For those in the Mac side of the world, and interested in the multichannel
audio files subject, there is an hard-disk based editor made by Yamaha Co.
that is able to read the 6-channel WAVE file that Mr. Dobson has in his
Soundcard Attrition Page. 

Not only read it but also allows you to save it in AIFF and Sound Designer
format. It even gives you a preview with info on the file. 

Other option is to create a multichannel file with up to 16 channels with up
to 32 bits per sample.

I dont know if it is in the Yamaha website, but I got it in a German CD-ROM.

It is great to check those hard-earned quad files made with Csound.

It is called TWE and it is free BTW.

Happy new Sunday and excuse my bad English et cetera et cetera.

Javier Ruiz.

P.S.
it seems there is also a PC version. I have just found them both at: