I was talking recently with a friend about the visual representation of sound. I was trying to get him to think about the fact that sound could be represented in colour, shape and texture. Many of us think about sound in an aural sense, of course; we can describe quite clearly in those terms (is it a loud sound? a high frequency sound? a quiet hiss?), but not everyone thinks visually. We all have the ability, but some of us don't nurture that side of our thinking. This is a shame, because there are many parallels to be found between the two worlds.
Here's an example. When I hear a plucked bass guitar, I hear it visually as a very 'liquid' sound (ok, bear with me here and try and think about what that sounds like... I guess we might think of late 1960s Lalo Schifrin soundtracks, or Herbie Flowers bass playing on Serge Gainsbourg's 'Sous Le Soliel Exactement', or 'You Can Fall' by Broadcast, or 'Torch' by the Sisters Of Mercy). i visualise a kind of tear-drop shape, on it's side, it's probably brown and it has a liquid appearance. That's the kind of thing I mean. The way I arrive at that shape is by thinking of the sounds' envelope (that is, it's attack phase, the decay, sustain and release), it's register on the musical stave and it's associated frequency range. The texture of the visual comes from the timbre of the sound, so in this case, I've gone for a kind of burnt umber liquid.
Similarly, high-hat cymbals sound very 'silver' to me. Thin slivers of silver foil, ribbon-like in appearance. They are thin, because of their place in the frequency spectrum and also because high-frequency sounds tend to carry a lot less energy in a mix.
When I'm mixing a piece of music in a recording studio, I rely mainly on my ears, the monitors and the room in order to make mixing decisions, but I invariably have a spectrum analyser on-screen. In one sense, this gives me a visual representation of the 'shape' of the entire mix, as it is happening in real-time. The overall shape of the mix is more often than not, a 'tapered log' shape. There is good reason for this; low frequencies (bass lines, kick drums etc) take up much more energy in the frequency spectrum than the high frequencies (cymbals, shakers, the 'esses' of the vocal etc). Because of their nature, high frequencies require far less energy to sound as subjectively loud as low frequencies. That's the foundation that most mixes are based on.
Oscilloscopes are another way of representing sound in a visual form. They are very useful tools for analysing the waveform of a sound (not to mention entertaining when connected to the output of an analogue synth), but the visual waveform only gives us part of the picture. The problem lies within the fact that, like the spectrum analyser I mentioned before, they are diagrammatic in their representation, rather than conveying the sound in an emotive sense.
I just wish there was some kind of software out there that would represent the images in our heads, on screen. In the meantime, I'll try and think about sound visually, just a little, just sometimes. Try it sometimes, too. It will alter the way you perceive sound, hopefully for the better.
- Jb.