[plt-scheme] Sound Card Access

Hello all,

My apologies for the previous message, I didn't change the e-mail
subject to something relevant, and my message was sent quoted.  Here
is what I was getting at:

I am interested in the possibilities of using Scheme as a synthesizer.

Does anyone know of a way to access the sound card for audio output
(and maybe input too) from within Scheme?

I would be very happy to hear if anyone else has made any attempts at
something like this or can point me in the right direction.

Thank you!

-Elijah Rutschman