This article is from the Electronic and Computer Music FAQ, by Craig Latta Craig.Latta@NetJam.ORG with numerous contributions by others.
Date: Mon, 15 Jul 91 15:17:12 PDT
Subject: Real time sound mixer
A new real time sound mixing program from Paul Lansky on the net...
From: paul@phoenix.Princeton.EDU (Paul Lansky) Subject: Real time sound mixer
Date: 14 Jul 91 15:26:45 GMT
I have placed a real-time sound mixing program, RT, in
pub/music/NeXTrt.tar.Z at princeton.EDU. This was
written by me and Kent Dickey, and essentially allows you
to play arbitrary segments of up to 32 different soundfiles
in 8 tracks, as if they were notes, overlapping, panning,
enveloping and even pitchshifting them. The limitation on
the system is essentially disk throughput, which seems to
allow you to do about 450k bytes per second. This means
you can mix two 44k stereo files, 2 22k stereo and one 44k
stereo, etc, at a time. A really nice feature of the program
is that you can play different channel formats and different
sampling rates at the same time! If you overload the system
there will be interruptions, but you can also write the mix out
I *think* it is fairly robust now, and easy to use. I have
not placed it in the archives since I want to keep tinkering
with it, and so want to keep it in reach.
Future additions will include a signal editor, and perhaps some
sort of graphic display, although the latter would be tricky, given
that for my current work I often find myself lining up as many as
500 sound segments to play.
I am anxious for feedback and suggestions. This program will not
work well on 030 machines. Enjoy it.