Re: for dogs only
@Hey Nonny Nonny Mouse and all
I'll try that. Might be worth trying Audacity's low pass filter on the square wave track and progressively reducing the cut off frequency until your (individual) perception of the 'richness' of the square wave changes notecibly. Make a note of the cut off frequency you end up with. It might be lower than you imagine. You can play with pure data (puredata.info) as well to build up waveforms by superimposing harmonics (fourier synthesis).
I've stopped worrying about audio quality above CD or 196kb/s mp3 these days: hypersonic starts around 10 - 12kHz for me.
Random thoughts: visual processing starts in the retina and optic nerve, and our visual model of what is before us is synthesised in a couple of regions of the brain at quite a high level above the raw signal from the rods and cones. Damage to the various components of the visual cortex has subtile effects (Oliver Sacks wrote about aspects of that in one of his books).
Perceptual psychologists (the experimental ones not the boutique ones) have developed a concept of 'categorical hearing' - a musician trained in the Western tradition will tend to bin sine waves into pitch classes even when they are quite a few (hundred) cents off an actual pitch. Non-trained ears can recognise the sine waves as different at a finer level. BUT talk to a pianist who works with a string quartet (e.g. playing a piano quintet) ... the quartet musicians will drift into perfect fifth intervals instead of the equal intonation interval if they rehearse without the pianist for any length of time...
My direction of travel here is that 'music' may actually be made in our minds rather than existing as a sound field in a room, so you only need to produce *enough* of the sound field to trick the mind into making the music... mumble mumble
Coat icon: its time I took a walk. Mine's the one with the penny whistle in the pocket.