Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pacbell!tandem!leo
From: leo@tandem.Tandem.com (Leo Hejza)
Newsgroups: comp.sys.amiga
Subject: Low Pass Filter
Message-ID: <434@tandem.Tandem.com>
Date: 10 May 89 17:13:15 GMT
Distribution: usa
Organization: Tandem Computers, Cupertino,  CA
Lines: 21

At the risk of flames, I have an old, often asked question, and one
other one

I am in the process of writing a digital sound synthesis program
for the Amiga. Rather tha using the D/A hardware to play samples
I am using it to play back a stream of digitized information. The
information is generated by a program which emulates analog synthesis
modules (e.g. oscillators, filters, envelope generators), under
control of a musical score input file. The program is functional now,
I had eight voices playing last night.

Now the questions, How do I turn off the D/A low pass filter. I'm playing
28K+ samples /second back and want to recover all the information which
is there. I already pass the output through a steep digital low pass
filter below the Nyquist frequency so aliasing won't be a problem.

Other question, is my playback scheme the same as an SMUS player. If so
could someone send me the file format? I'll change my output to be compatible.

Thanks for any help. I'll send the program out after the user interface
exists.