Feature request: sound

It would be very nice to have sound in LOAD81, and following the 8-bit ideology, if it were a synthesis-oriented approach (as opposed to .WAV sample playback) this would be very neat.

What I have in mind is some sort of mini-synth such as the one found in sfxr:

http://www.drpetter.se/project_sfxr.html

A Lua table could be used to set the sound parameters for each synth voice (maybe it can be multi-timbral?):

sound[1].envelope(0,0.5,0.275,1) -- ADSR
sound[1].filterType(LOPASS)
&etc.

.. and then triggered with something like sound[1].play() / sound[2].play() and .stop() and .pause() and so on. This would make it very easy to set up a series of sound effects in tables and trigger them according to programmer needs.