Mixing

Using Compressors to increase attack - Musical Creativity 45

Alan — Thu, 21 Aug 2008 16:30:37 +0100

Compressors are regularly used to tame errant dynamics or to increase the perceived volume of a track. As well as squashing the audio, the compressor can be used to bring out some elements more than others.

Letting the attack through

Remember when you were learning about compression? You probably wanted the attack at 0ms so that the whole signal was compressed equally. But it ended up in a squashed mess. The output sound had a different quality to what was put in. The guitar no longer sounded like a guitar, but like an old keyboard emulation of a keyboard. So we all gradually learned to allow the initial transients through with delays of 20ms upwards, depending on the instrument and the wanted effect. This allowed for a natural sound.

Reverse your thinking

Usually we're using a compressor to tame peaks or increase the perceived volume of the track by decreasing the dynamic range. This time we'll focus on increasing the dynamic range and still using a compressor.

Set the compressor to have a longer attack, e.g. 30ms to let the initial strike of a guitar string through. Set the compressor to moderately reduce the dynamic range of the rest of the signal. What you'll see if you compare the input to the output is that the initial peaks where the string is hit or plucked are louder in comparison to the rest of the signal.

Additional Options with Software

Pre-empting

The problem with hardware compressors is that they can only react once they receive the signal they receive. Software compressors have the advantage of being able to look-ahead at the signal and react before a hardware compressor could. That's useful for enabling the compressor to act on the initial transients.

Sidechain

You can also eq the input signal to trigger the side-chain. Some allow you to do this in the plug-in itself. For others you'll have to set up an aux/bus track and route the signal in parallel through that and eq the aux channel. This can be done in hardware as well if you eq the feed going into the sidechain.

Using Other Processors

Expanders

Expanders are built for job of increasing the dynamic range. Effectively, they're compressors with upward compression. And so should be more suited to increasing range. However, sometimes I prefer to use a basic compressor.

Enveloper

These react to the envelope of the sound. Think back to the basics of synthesis with every sound having Attack, Decay, Sustain and Release (ADSR). Envelopers provide a way to change the gain at the various stages. The one in Logic allows the user to change the gain at the Attack and the Release stages. So you could potentially just change the gain of the attack and leave the rest of the signal alone.

Gain

This doesn't increase dynamic range. I've included it because I had to increase the gain of the guitar track to match the results of the effects.

Results

I recorded a steel-string acoustic guitar using an x-y pattern of 2 small diaphragm microphones. These were routed to a bus (aux in Logic) and the effects were applied to the bus only. The main output for the microphone channels were removed, meaning that the signal was only going through the bus. I applied the following effects in turn: compressor, enveloper, expander and gain. For each one, I spent about 2 minutes changing the parameters on a part of the track that was of roughly average volume. Then I bounced the output to a separate audio file.

It's important to note that I only spent the time configuring the parameters for one part of the track. There were louder and quieter parts elsewhere in the track.

Rather than play the whole 5 minute track, I've extracted three parts; one quiet, one average, one loud.

The Screenshot

The screenshot shows the unprocessed as well as the results of having each of the compressor, gain, enveloper and expander applied in turn. The order from left to right is Average, Quiet and Loud.

Download a larger version of the image here

What you'll notice is that there's not that much different between most of them in the average and quiet. However, the compressor did a good job of using the dynamic range available. The gain effect just made everything louder, as it's meant to, but doesn't bring out the peaks. The expander and enveloper both coped well, but I prefer the compressor.

In the Loud section, we see the issues with applying parameters for one section only. In all reality, we'd probably be riding the faders or at least automating the fader/effect parameters. But for the moment, it gives us a good idea of how flexible the processors are. Most of them are showing clipped waveforms for the loud section, indicating too much make-up gain. The compressor waveform still has thin ends to the spikes indicating a more managed approach. And the sound does reflect that.

Quiet

Unprocessed

Gain

Expander

Compressor

Enveloper

Average

Unprocessed

Gain

Expander

Compressor

Enveloper

Loud

Unprocessed

Compressor

I've only published a few of these files in case anyone risks damaging their speakers. I haven't published the files with square ends, e.g. the "gain" and "expander" files.

Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

Use of Tremolo - Musical Creativity 42

Alan — Thu, 26 Jun 2008 21:27:29 +0100

I've talked about tremolo as a musical feature before, this time I want to go into more detail.

First things first, let's sort out the guitarists: I don't mean using the tremolo arm/whammy bar or whatever you want to call it ("handle" as my girlfriend called it - and no she won't be picking up my guitars for a while). The whammy bar creates a vibrato feature, not a tremolo. Vibrato alters pitch.

Amplitude

Tremolo is the act of altering the volume of a note or set of notes. For an electric instrument, the simplest to hear is by regularly turning the volume knob up and down. The notes fade in, fade out, fade in, fade out and so on.

It's a great tool for livening up a piece of music. The previous article on the subject covered some more ways of using it.

Recordings

Tremolo features on a lot of famous recordings. Three extreme examples are:

How Soon Is Now - The Smiths

Crush with Eyeliner - REM

What's the Frequency Kenneth - REM

But it's used more subtlely on many, many more recordings. Think of any country song and listen to the guitar. Many of the 1950s and 1960s guitar recordings had tremolo on them. Think Duane Eddy (although he mixed it with vibrato by using the whammy bar a lot). Lots of Elvis recordings featuring Scotty Moore had tremolo. This situation was accentuated and facilitated by the inclusion of tremolo circuits in the guitar amps, e.g. Vox

Types of effect

The common tremolo effect alters the amplitude or volume of the incoming signal apply a regularly repeating pattern before output. The most common pattern is the sine wave, although some FX units also allow square and sawtooth. The output signal increases, decreases, increases, decreases, etc.

The waveform applied changes how fast the signal reaches the extremes and how long it stays there before beginning the journey to the other extreme.

Depth

If the signal is applied completely at 100% depth, then the output will have no signal at the points when the applied FX is at its lowest point, conversely it will have the maximum volume when the FX is at its highest point.

Lowering the depth introduces a less radical effect, to the point that if the depth were at 0%, then there would theoretically be no difference between the input and output. As with most effects, the most appropriate depth is usually somewhere between the two extremes.

Symmetry

The waveform applied so far has been the same on both sides, i.e. going up and coming down. Altering the phase allows more time for the signal to climb and a quicker fall or vice versa. This is great for imparting a slower or a rushed feeling to the track.

Phase

For a stereo tremolo, the default set-up is to have the signal applied equally, but alternately to each channel. Changing the phase control alters the timing displacement of the second channel compared to the first, which can be used to create panning echoes or dotted note rhythms.

No Depth?

I'd usually use a tremolo inline with the signal, either at the recording stage (e.g. between guitar and amp) or at the mixing stage (as an insert). If there's no depth control, then patch the tremolo into a send and emulate the depth by the relative values of the signal and send faders.

For guitarists, if there's no depth control, then you maybe able to use it in the amp's FX loop if you've got a variable dry/wet mix. This may not work well, since the FX would be placed after the pre-amp. Depends what equipment you're using.

Playing with fingers

A classical guitar tremolo technique involves repeatedly plucking the same string with the first, second and third fingers. This is often a bass and/or melody note plucked with the thumb followed by the three fingers or sometimes a fourth is employed but the fingering changes.

The most famous example is probably Recuerdos De La Alhambra by Francisco Tárrega, although I think Agustin Barrios Mangore's Una Limosna por el Amor de Dios (Alms for the Peace of God) shows the technique more.

Various forms of flamenco use a similar technique, sometimes using the thumb plus four finger notes (not necessarily four fingers, often three fingers with one repeated) to get a 5-tuplet pattern.

Pick

For electric guitar, rapidly repeated picking of the same note gives a tremolo effect that can be used in solos. Do it too often and you'll sound you can't move your fret-hand fingers. Best to intersperse it with other techniques. Check out the Ozzy Osbourne recordings with Randy Rhoads, e.g. Tribute, to get an idea of how to fit it into a solo. He doesn't use it that often, but when he does, it works well. Nowadays, watch Matt Bellamy of Muse. There are plenty of others, but they're not coming to mind right now.

In other forms of music, e.g. drag, it can be the main feature. This is more likely to happen on the lower strings of the guitar, with a springy/slap-back reverb. Think Dick Dale. Although perhaps not part of drag, Miserlou (as featured in Pulp Fiction) is a great example of how a simple riff can lead the track. The repeated picking comes from his experience with an oud (or ud).

Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

43 Reasons for Collaborating - Part 1 - Musical Creativity 41

Alan — Mon, 16 Jun 2008 19:22:07 +0100

A short series of articles on collaborating with other people to make your music better, make it heard or to help them move their music forwards.

1. Recording

1a Engineer

It's so much easier to play, record, change settings, do another take and all those other tasks when there's an extra pair of hands doing the engineering. It means you can focus on feeling comfortable and ensuring that you play to the best of your ability without having to change position and move a microphone, listen to the output, try again, etc. The more you work with an engineer, the more familiar you'll become with their way of working.

1b New outlook

Work with other engineers will remove some of the familiarity of the recording process or familiarity with a particular engineer but will open up new ideas. If you're acting as the engineer for someone else, then it may force you to think back to basics and undo some of your own habits that work well for you in your setting, but no so well for others in their own setting.

1c New kit

Not only do engineers have their preferred choices of recording techniques and equipment, some will have that equipment to hand. It's at the beginning and aspiring levels that it can make more difference since it's at the amateur and semi-pro levels that you're still learning which combinations work best for you. Perhaps you work with an engineer to try out their mics and return the favour later by recording them using your kit. The reciprocal nature opens up new opportunities and learning experiences.

1d Location or studio

Just as the engineer may have kit and techniques, they may also have access to other locations and studios. Want a good drum room, then you're probably better off with a studio, but want a particular type of sound, maybe even just a decent vocal booth and you may have luck with other musicians and engineers.

1e Crowd and audience

If you're thinking of recording a live gig, then the engineer may have access to a different audience (maybe bigger) than you're used to. Lots of live-recording engineers will have regular gigs. Getting a slot in one of those, could provide a ready-made, if not totally accepting, audience.

2. Mixing

2a Remix

Letting someone else mix your tracks has a few of advantages

provides a fresh pair of ears to your music
means you can focus on recording and playing
brings a different tone to your music if you use a mix engineer who has their own sound

Sometimes the mix you have just doesn't work, giving it to a mix engineer may help you out of that rut.

2b Revamp

Think of this being the use of "remix" that's becoming more prevalent nowadays. Hardly mixing in the traditional sense of setting faders, processing and effects, but getting involved in cutting-and-pasting the arrangement. In this case, the re-mixer would be chopping verses up, perhaps interspersing them with samples from elsewhere. Is there a better word for this?

2c Mashups

Taking the revamp approach a step further for a more extreme result.

2d Different mixing skills

There are a few tricks to mixing for 12 inch vinyl. Although many of these may be properly found within the mastering engineer's remit, knowing about them from a mix engineer's perspective will help move things along more quickly.

3. Playing

3a Skill

There are times when you have to admit you can't play an instrument well enough to be able to record what you want to. This is where the session musicians come in. At the more amateur level, it's more about finding a friend or a contact who can do it for you. Just beware of contractual implications if you go that route.

3b Extra Instruments

An extension of 3a, sometimes you just want a different instrument in your recording; one that you can't play. The most common for these would be real violins or cellos to augment sampled strings, or real trumpets or horns to augment brass sections. While you can get friends to fill in, again beware of contractual implications.

3c Vibe and Groove

Different players have different styles of playing. Compare the rock bassist to the jazz/funk bassist. Different styles and often even a different sense of timing. Actually, that should probably read that they can have a different interpretation of timing. By bringing in a musician who can add a different vibe, you can dramatically change the feel of a song.

3d Name and Kudos

This is the guest slot. Having someone with a known name can introduce you to their audience, but also give you the reputation of being able to work with others.

3e Broaden your Horizons

Playing or working with other musicians is a great way to expand your own horizons. Watch what they do, how they set-up, how they approach the gig, what kit they use and how they use it to produce the sounds requested of them. And that's without learning from the notes they play or the phrasing they employ.

Other Pages

Page 2
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Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

Arranging Multiple Parts for a Guitar - Musical Creativity 37

Alan — Mon, 28 Apr 2008 19:49:34 +0100

As well as composing and recording, I play guitar in a band, playing a mixture of covers and our own originals. We don't stick too closely to the originals when we cover them, realising that we only have four members (guitar, bass, drums and vocals) so many songs have to be stripped down to work.

Going from a song that has many parts to a cover version with only four instruments can leave you feeling a bit naked when playing live. It doesn't help that as guitarist, I often have to play several parts at the same time.

It's just arranging

You've got 6 strings. So if you're adding in a piano part and a guitar part, then it's time to pick the most important notes. After all, you can only play a maximum of 6 at a time.

Listen

Listen to the music and pick out what makes the tune. A lot of notes are filler. The music sounds different without it, but that's ok.

Listen to other listeners

Not only listen to the track yourself, but ask the other band members what elements of the song stick out to them. Singers pick out different notes to bass players and so on. So there's me as a guitarist saying that some notes are missing from our arrangement, but no-one else has noticed. And it happens the other way around, where one of the other members will ask where a certain part is.

Who's the arranger?

If you are, then don't be afraid to ask the other musicians to try playing parts that they wouldn't have considered. I'm fortunate to be in a band with an accomplished and adventurous bassist. That's good because it allows us to swap when it comes to supporting the melody or the rhythm. The drummer's also open to new ideas. They, in turn, ask me to play other parts I hadn't considered.

The tone of the guitar

For notes played at the same time (e.g. chords), we've a limited tonal range. Each note in the chord has to be nearly the same tone and volume. There's some flexibility if you pluck with your fingers, but it's still pretty restricted.

If you look across the length of the song, then guitarists have access to a massive range of tone since we can vary it as we go along. The trick there is to tie the tone to a musical part, e.g. the piano lead.

Two at once

The guitarist can support the rhythm by striking staccato chords, but then there's an empty space for pads to ring. My way around this is to play the ringing chord and then play the rhythm on the low 6th string, sometimes with the 5th depending on what the chords are and how much I need to reinforce the rhythm. This works well clean or crunch sounds, not quite as well with hi-gain tone, but it can still work. Just depends on the chords being played and the rhythm that it needs to fit into.

Swapping between instruments on the same tone

To differentiate between two instrument parts, I've used upstrokes on one and downstrokes on another. Swapping between primarily plucked and primarily legato/glissando can help differentiate.

Try alternate strokes.

Similar to the ringing chords plus staccato rhythm above, the root notes can be played on the downstroke, then the ringing chords on the upstroke. Even more useful is the downstroke on the root, then several staccato chords using upstrokes. Not exactly special, but can be very useful for syncopated rhythms.

Let the bass play

If the bassist is playing the root notes, then the guitarist doesn't need to. Frees the guitarist up to play other parts.

Too much to do

Guitarists only use one pick at a time, but can use several fingers. So think about whether some finger picking would help. In addition, I use a combination, playing some notes with pick, then treble notes with fingers, often alternating, but sometimes together. Works well at emulating piano parts.

It's also the only way I've found to keeping the strength of the normal guitar notes while playing a melody on the higher strings. It takes practice but is well worth it since it opens up a whole new area of complexity.

Stretch

Bassists usually only play one note at a time. That's an overstatement, but stretch your bass player. For instance, if they play chords or at least octaves, they can free up the guitarist from chordal duties. Also the bass is a great instrument for filling in string parts. It doesn't sound like a string section, but fits in a live mix well enough, especially when played around the 5-9th frets on the A and D strings.

Composing

Why is this in the composition section? The more techniques a player has, then less restricted the music will be. By thinking how to deconstruct a song to a minimum of instruments, then you get to realise how much of a a song is superfluous. Look on youtube and you can watch any number of acoustic covers of songs, not all good mind you. The better versions have been arranged by musicians who have thought about which notes matter most and have fitted them into the composition.

Any other ideas

I'm interested to hear of other ideas or your experiences with this.

Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

Changing some tracks - Musical Creativity 36

Alan — Thu, 17 Apr 2008 20:39:32 +0100

I wrote the bulk of this text a couple of months ago after a day of not producing as much as I'd liked to. There are no real suggestions of how to improve or learn, but I thought I'd describe my thought processes so others may learn from my experiences.

Yesterday

I had one of those days yesterday where inspiration was lacking. Partly it may have been the brief I'd been given since it didn't have the depth of information I'd have liked. Mainly, though I think it was just me, I couldn't really find much to do, not that sounded right anyway. But I still managed to deliver something of sufficient standard.

How?

I tried creating music for the part from scratch. I wrote some interesting ideas. But they didn't really fit the brief as far as I was concerned. They're now exported to mp3 and the relevant project files archived for future reference. You never know what may be useful later on - I revisit unfinished files on a regular basis and often manage to complete them another time.

I then reviewed my collection of part-finished works hoping there was something nearly finished in there. Unfortunately there wasn't anything near finished. So I took two that really needed a lot of work and moved them forwards. One was almost finished from a composition point of view, but required a lot of mixing and processing, the other required more composition and almost no mixing.

Both featured a repeating rhythmic phrase and some background drums; one had a few bits of melody as well. The originals were rough versions of ideas that I thought worth keeping but didn't have the inspiration to finish when I first recorded them. They were a mixture of midi-triggered samples and audio recordings.

First Track

The first track was a sad and slow bluesy-jazz and had the following tracks:

drum loops
electric rhythm guitar
electric bass
electric lead guitar

For this one, it was mainly a case of arranging and mixing rather than composing. The original idea was over 3 minutes, the brief was for 1 min 50 seconds. So I worked at taking the best bits and arranging them into something musically attractive.

Before Arranging

Before I could arrange the work, I had to sort out the audio. It just didn't sound right. The original was recorded in one take per track, i.e. place some drums out, record the rhythm guitar in one go, then record the bass, then the lead guitar. Any of the audio processing was done very roughly just to convey the idea.

Rather than tweak and tweak and tweak some more, I removed all the processing and started again. After having listened to the track a few times, I knew where I wanted to go with it.

Clear some space
Guitar tone and amp selection
Set up a delay for the lead guitar
Compression for the drums
Correct reverb for drums
Mixbuss reverb, eq and compression

Clear some space

First of all I had to clear some space, the instruments were overlapping way too much. This involved some careful eq mainly focussed around making room for the bass guitar to be heard. Rolling off the low-end on the guitars and nudging the drums down in the same area helped bring the bass through considerably.

Guitar Tone and Amp Placement

I actually liked the tone I'd originally recorded with but it didn't fit in my vision of the mix. I changed the speaker emulation for a more familiar British 2x12 and turned the gain down to reduce the distortion. I also removed the reverb from the plug-in so I could add a different one later to fit in with the rest of the instruments. I'd considered re-recording with guitar amp and microphones but decided against this since the tone was sufficient for the background rhythm guitar.

Delay for lead

The lead guitar sings and needs to be heard above and beyond its accompaniment. I used a stereo delay on a aux bus for this and set the send so that it was audible. I did think about backing it off as I would do for a reverb, but I liked the extra character the delay gave the guitar.

Compression for drums

The drum loops were from BetaMonkey. They're good quality loops and are usually very dry or, in the case of the early ones, in a good-sounding room. In this particular song, the drums didn't cut through as I'd like. I could hear the snare too loud in the mix compared to the other drums. So I used a multiband compression on the drums with the gain mainly in the lower two bands and stepped down in the higher two respectively. Although setting the compressor up in this way is probably the opposite of what I'm more used to (i.e. heavier treble, lighter bass), this changed the character nicely.

Reverb for drums

To make the snare and cymbals live more in the mix, I used a reverb on an aux channel with a high-end pass. This added a nice, but barely audible quality to the drum track. The compression used in the previous step had brought the other drums up to a good level so this action balanced that out.

Mixbuss

Although nicely balanced, the instruments almost sounded like they were recorded in different rooms and the overall recording was slightly flat. A small eq alteration helped. I added the slightest amount of reverb to bond it together. I'm usually happy with a convolution reverb of a nice-sounding studio to get the feel for a track and then choose from there when I've got an idea of where I want it to be. For this particular track, I used a jazz club reverb for a more live sound. It fitted the bluesy-jazz feel of the whole track.

The final element in the chain was a limiter. I usually have two exports, one with the compressor in the chain and one with out. Then I've got the flexibility to hear what it would sound like compressed like many other tracks but still give clients the more dynamically accurate version without the compression.

The second track

This was a lot simpler in scope, but I spent a lot more time on it due to having to compose more parts and phrases to glue it together. The original idea was 50 seconds long and consisted of a midi-triggered samples of a piano, acoustic double-bass and an acoustic drum-kit. That's not that long.

Timing

I'd originally played all the parts on a midi keyboard. So the first step was to ensure all the notes were on time. This was a combination of quantising and manually adjusting the placement of notes. Some of the notes were also wrong, just not fitting in with the key. I manually adjusted these as well, rather than relying on any logical processing.

Drums

Oddly for me, the drums were samples rather than loops. I tend to find that loops fit in a lot better than any samples ever can. For this song I'd only used 4 drum sounds. I'd envisaged a drummer with an older style kick, snare and hihat, rather than the mammoth rock kits of the 80s. This simplicity, specifically the lack of cymbals, helped make the sound more realistic.

To add further realism, I patched in a light drum room reverb, just light enough to hear.

Piano

The piano sample sounded too artificial when solo'ed. I auditioned a few other piano samples, including some that were sampled from much better pianos and with much better recording. Yet I decided on the original but with two major changes:

Decreased the low-end of the piano by about 6dB below 300 Hz. Although the piano is mainly providing a bass rhythm for this track, it still comes through with the low-end reduced.
Reduced the velocity of the piano notes. Most were in the upper quartile which had a harsh sample layer. By reducing the velocity, I got to use a combination of different layers.

Structure

The original was 50 seconds long. I needed an extra minute. By thinking through the structure I wanted to introduce, I was able to create the 1 minute 50 required. It was just on the edge of having to introduce a different chord progression, theme or motif. Any longer and I would have had to. As it is, the different instruments coming in and out make it interesting enough for the short time. I looped the piano, bass and drum parts. Cutting out a few loops to bring attention to other instruments. I then added the guitar over the top and then the jazz organ.

Guitar

The guitar was troublesome. I knew it needed another instrument or two to keep it going to 1 minutes 50 seconds, but every time I played along to the song, I was left short of ideas and just had a tangled mess. I also sat down with the chords and tried working out a melody. Again nothing worked. It was accurate harmonically, just not interesting. I tried changing guitar sounds a few times - I find the inspiration from that can help a lot, even from a totally inappropriate guitar tone. In the end, I switched on the cycle function and hit record. About 45 minutes, later I had enough pieces I could use. These were pasted into the arrangement and unused pieces deleted.

The tone was deliberately kept mellow.

Jazz Organ

Again another instrument to fill in the gap from the guitar and bring the listener out of the emptier phrase in which it starts. I played this, then quantised/shifted notes manually. I was careful to use the correct quantisation for each phrase (mainly 16ths and 24ths, i.e, triplet 16ths).

Finally

There was almost no eq of the individual tracks, they sat well enough together without much alteration. I added a simple jazz reverb on the mix buss and compression similar to the first track. That worked well.

Results

I'm happy that I finished two pieces both of the required length meeting the brief.

Was it a good day though?

Probably not.

I wouldn't call either piece usual for me. That's not necessarily a bad thing. It wasn't so much that it was a different type of music to what I'm used to (they're not, I'm quite happy with that style). Instead it was more than I felt uncomfortable with the end results. They're good enough for background music which is what they're intended to be, but don't have the same melodic focus I'd usually want.

I was nowhere near as creative in the whole day as I was in the first hour of the following day. On that day, I wrote three good ideas in less than an hour. I spent an hour tidying up one of the tracks, bear in mind it was 7 minutes long. Like the above tracks, they'll take longer to finish, but that can wait for another day when I need to progress them further.

Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

Improved Use of Gates - Musical Creativity 27

Alan — Sun, 10 Feb 2008 12:24:41 +0000

I've taken a detour from writing about timing for a few articles and there are a couple of points still to say about that (but for another article). I'm also planning some articles on creative uses of processors and effectsbut that's a short while away, while I prepare the audio samples so I can explain it better.

In the meantime, I saw a post over at thestereobus.com about using gates for enhancing the sound of kickdrum.

It's a good article and I like it. I especially like the reminder about mixing the gated sound with the original signal. Parallel routing is something I use often to blend in processed and unprocessed sound.

"At 0ms this sounds pretty ridiculous and unnatural"

That's good advice if you want to ensure fidelity to the original sound or at most enhance it. If you're using the gate more creatively, it's at least worth trying the ridiculous settings. Sometimes they just work.

Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

Emulating Drums - Musical Creativity 24

Alan — Thu, 31 Jan 2008 13:27:34 +0000

Following on from the previous article on emulating bass, this article is about emulating drums and mainly about emulating drummers.

I'm of two minds when I emulate drums. I'm either:

aiming for a realistic drum sound or
aiming for a drum sound that doesn't need to sound like a real drum

The first aim involves working with compromises. Ideally, I'd be better off recording a good drummer playing an acoustic kit in a nice-sounding room with great mics, preamps, etc. That's not always possible. And the aim maybe to have something ready very quickly, so I turn to emulating a drummer.

The second aim is more useful for generating percussive elements that fit tonally into the music but with a different impact to that which I could achieve with a normal drum-kit. I'll discuss those in a separate article.
In this article, I'll stick with (1) achieving a realistic drum sound.

Loops

My short piece of advice is to use drum loops. Use some decent quality loops with sufficient rhythm variation and inherent tonal consistency and many would be hard pressed to tell the difference between a drummer and a loop. If they can tell the difference, it's either a bad set of loops or user error, e.g. you've used the same loop too often in the song. After, how could they tell the difference since it would have been a real drummer who recorded the loop in the first place.

Midi

The long answer is for when you don't have any suitable loops, including if you don't have any loops. Then you'll probably be resorting to midi to trigger drum sounds in a sampler. There are some tricks to make it sound more realistic.

Play like a drummer

Drummers have a maximum of four limbs. That's an immediate restriction of 4 items being hit at any one time. Can be more than 4 note polyphony though due to layering and the release of certain instruments (e.g. cymbals). Actually the right hand can hit the rim and the head of the snare together, but that's a bit of an exception.
That's the first restriction. If you want it to sound like a drummer, then limit it to four hits at a time.

Layout

Also look at the layout of a traditional drumkit. For a right-handed drummer, the right-hand usually crosses the body and plays the hi-hat, while the left-hand plays the snare. Either hand is used for the toms and cymbals. And either hand can add to the other hand to double up on the snare or hi-hat. Different styles call for different arrangements. That's the traditional pop/rock layout and handling.

Watch the combinations

The short closed hi-hat sound is formed by the right-hand hitting the hihat while the left-foot holds the hi-hat closed. If the right-hand is hitting the snare, toms or cymbals, you can't get a closed hihat sound. If would be the gated half-open sound caused by the left foot lifting the top hi-hat and then pulling it down. It's a weaker sound than closed hi-hat. A rock drummer may have a much more ringing open hit-hat sound, especially for keeping up with doubletime kick and snare patterns.

Would a drummer alternate?

If the pattern relies on 16th beats on the hi-hat, then the drummer would most likely alternate hits between the right and the left hand. I know of four ways to implement this:

Look at each hihat hit and manually change alternate hits to use a different hi-hat sound
For using a sampler such as Kontakt 2 or Kontakt 3, you can write a script to alternate between the left and right sounds of the hi-hat with each hit. You could get even more serious and tie it into the snare hits (assuming that a snare hit would be left-hand and hi-hat would be left-hand). The more you think about it, the more you can write.
Use logical processing on the midi file so that it separates out alternate notes. Rather than processing every alternate note, it may be easier to divide your bar into two sets, those corresponding to the beat and those on the off-beat. Then alter the two sets separately.
Use a drum-specific software plug-in that will calculate which sound should be played. This is what the brain unit of most electronic drums should be doing, interpreting the received notes so that they sound more realistic.

It also applies for other drums as well, not just the hi-hat.

The Machine Gun

The bane of a lot of 1980s pop was the electronic snare that sounded the same no matter how hard you hit it. Hit it in a quick repetition and it sounded like a machine gun. There was just no flexibility. Drum synthesizers and samplers have come on a long way since then, but unfortunately some interfaces do not make it obvious to avoid. It's not specific to snares either; hi-hats, toms, anything hit rapidly and repeatedly risks introducing this effect.

Similar to the methods for alternating the hands, I can think of 4 ways of implementing this:

Look at each hihat hit and manually vary the velocity of nearby hits. If there are left and right sounds for the drum, then alternate them as a drummer would. Also vary the timing slightly, too regular and it may sound artificial.
For using a sampler such as Kontakt 2 or Kontakt 3, you can write a script to alternate between the left and right sounds of the hi-hat with each hit. You could get even more serious and tie it into the snare hits (assuming that a snare hit would be left-hand and hi-hat would be left-hand). The more you think about it, the more you can write.
Use logical processing on the midi file so that it separates out alternate notes. Not sure how effective this is for avoiding the machine gun effect. Largely depends on your the processing options offered by your DAW. Again, similar to the approach for alternates above, it may be worth dividing your bar into two sets, those corresponding to the beat and those on the off-beat. Then process the two sets separately.
Use drum-specific software plug-in that calculates the appropriate velocity or sample layer. This is what the brain unit of most electronic drums should be doing, interpreting the received notes so that they sound more realistic.

Ghost Notes

What makes a real drummer more interesting than a basic drum pattern is the presence of ghost notes. This is where the drummer would lightly hit a drum, e.g. the snare, but not as a focus of the rhythm. Often these pre-empt the main snare hit, almost leading into it. The ghost note would be short and lower in volume than the main hits. The ghost notes don't just have to pre-empt the main hits, a drummer will include them in to vary up the patterns and to add spice to the rhythm. If they're occurring in the same place in every beat, then they're probably not ghost notes but an integral part of the pattern. I've always seen ghost notes as being variable throughout a song. Due to the varying lower volume, if you're not listening carefully, some ghost notes would end up being imperceptible.

Try listening to a jazz drummer, especially if they're playing a simple blues rhythm. You'll notice the ghost notes more when the rhythm is simpler.

Accuracy

This is one I have issues with. How accurate does a human drummer need to be? If you look at recordings of a good real drummer, there's a lot of variation in how accurately they hit compared to the beat. But it will still sound in time. The issue I have is that it's against my understanding that being inaccurate is the right thing to do, just feels wrong to admit that, but it seems that being slightly inaccurate is the way to play. Goes to show that none of us are perfect. I tend to keep the main beat very close if not exact and vary other hits. And I always think about using groove features or humaniser functions.

In the Mix

The drums coming out of most samplers are still a raw instrument sound. There may be some reverb and compression but do they suit the music you're writing? If not, remove them and add the processing you want to add. More so, you may want to change the sound of a single drum, e.g. wanting to compress the kick drum more and add more of the click from the beater with eq. If so, then it's best to separate out the drums into separate outputs. You can then modify the sound of the individual drums to suit your tastes.

While you're at it, decide how you want the drums to sound in stereo. Are they all central? Or should it be set out from the drummer's or the audience's perspective. Then group them back together for drums for ease and so you have the option of processing the drums as a whole.

Other techniques

Harmony Central has some great suggestions for more advanced techniques. The concept of mute groups looks especially useful.

Reference CD

What should drums sound like? If you're aiming for realistic drums, then you'd do well to start with some reference files

There is some interesting information about the Led Zep sound over at Guitar Player

Learn to drum (even if only in theory)

Have a look round for lessons on the rudiments of drumming. Being armed with this information will help you create more realistic drum loops. I learnt by sitting in front of a kit twice a week and getting a few pieces of advice every month. No proper lessons. Even so this basic introduction helped me understand no end what it means to create a drum track. Understanding what constitutes a basic beat is the starting point. Try starting with these:

Shavano has an old but still useful article for anyone wanting to program drum midi patterns

Drum Plug-ins

I mentioned drum plug-ins above. I don't use the more advanced plug-ins so I can't really comment beyond that I've heard some very positive reviews including from some good drummers. From the demo samples I've heard, they introduce a level of realism that is difficult to achieve on your own with midi programming. There's a range of drum plugins offering different functionality.

The simplest are just sample triggers where you select the samples to be played and place them on a midi track. This is the basic type that you'll find with a lot of DAWs. If you're lucky, you can select from different drum sets, create your own, change the relative volume and/or pitch levels or even modify the envelope of the individual drums.

More advanced plug-ins allow you to select more authentic-sounding drumsets, designed to sound like specific Pearl or Ludwig sets and so on. They'll also give you the option of room sounds, microphone types and microphone placement. Extra features include the ability to blend the mic mixes. As they get more advanced, the plug-ins interpret the midi input into something more like what a drummer would play. This is the type that interest me more than others.

Some include drum patterns in a variety of styles, giving you the ability to compose the song's rhythm very quickly. They may even include intro and fill patterns. Remember the basic sampled drumkit on the old casio homekeyboards of the 80s? Well, this feature's a more advanced and flexible version of that. It's ok for using when keeping a beat, especially as a more interesting clicktrack, but I wouldn't use them in the end product.

Part of a series by Award Sounds offering a selection of creative ideas to kick-start or rejuvenate a composition.

More Pro Information

Alan — Thu, 06 Sep 2007 08:11:14 +0100

Adding to the short article on how the pros do it in the Learning the Ropes series, I'd like to introduce another book.

Behind the Glass gives interviews with top mixers and producers. There's a lot of insight to be found in the interviews, ranging from which kit they used, how they used the kit, through to how they have to interact with the people around them. Although you can't read it as a recipe-book (there are no detailed instructions), it will give you a lot of information about how you can achieve.

I referred to Bob Katz's book in an earlier article because it provides a great foundation in why we have to do things in a certain way. Read the two and you'd be well on your way to having a better idea of what you need to know.

How the pros do it

Alan — Thu, 26 Jul 2007 14:11:14 +0100

Ever wondered how a certain drum track was recorded? Well there are several sites that will get you a lot further than just using your favourite search engine.

GearSlutz Expert Q&A has many interviews with professional mixers, producers, engineers, etc. These have a vast amount of knowledge and between them a bewildering array of hit records.

SoundonSound run a series of articles interviewing producers and arrangers about how they achieved the produced sound track by track.

MixBuss is provided by SSL and has good tips and interviews again from pros.
I'll add more to this as I come across them.

Learning about sound in films

Alan — Thu, 26 Jul 2007 13:52:23 +0100

I'm generally against just posting a link to a site without some useful commentary (i.e. add more than just "check this out"), but in this case the site http://www.filmsound.org is so good that it warrants a link on its own. More so, it warrants a permanent banner on the site. No matter how experienced you are (or how good you think you are), you will find something new to you on the site. Before asking questions on any site about how a sound effect was made or how the overall sound was designed for a blockbuster movie, read the articles on http://www.filmsound.org