Jamie,
>
>>I am interested in generating multichannel output files with Csound (i.e.
>>> quad).
>>Is there a way of doing this with Csound?
>
>It depends what platform you are using.

Have to confess I am a Mac user for audio.  AIFF files are inherently 
multichannel.
I use SoundMaker (great effects), but also SoundEdit II to play these 
files. The Mac
Sound Manager mixes them to stereo though.
You can use third party multichannel cards to play back multichannel 
files - see
previous thread.

PS. You used to be able to create quad files in Sound Designer II format, 
but SD wouldn't play them.  This has probably changed by now. This was a 
while back.

PPS. I believe Sound Forge for Win plays multichannel files with DirectX 
installed.
I have also heard it's possible to play > 16 STEREO tracks on Win95 with
an Ultra Wide SCSI disk (err...using a custom app).
Ross Bencina's AudioMulch for WIn 95 does at least 8 tracks.