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From: toddpw@nntp-server.caltech.edu (Todd P. Whitesel)
Newsgroups: comp.sys.apple2
Subject: Re: GS Sampling - Questions?
Message-ID: <1991Feb17.034253.13536@nntp-server.caltech.edu>
Date: 17 Feb 91 03:42:53 GMT
References: <60166@eerie.acsu.Buffalo.EDU>
Organization: California Institute of Technology, Pasadena
Lines: 35

v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton) writes:

>	I am interested in doing some sampling applications with my GS and
>I'd was wonder if someone could enlighten me.  What is the max baud rate
>the GS can handle (probably based on the card one uses to digitize)?

Stereo boards currently available are lousy for this, because they use the
digitizer that's built into the Ensoniq -- it's very sensitive to noise and
the GS doesn't shield it nearly as well as the Mirage. The maximum sampling
you can get out of the ensoniq A/D is 8 bits mono at 31 microseconds per
sample (32, probably, to be safe) which translates to about 31,250 samples
per second.

> And is it possible to sample directly to a disk?

not using the ensoniq A/D, because the CPU has to service the digitizer for
every sample. You'd need a self contained digitizer that had its own buffer.
I've seen Mac II programs that sample directly to disk but they don't get
anywhere near CD quality.

No, I take that back: you might be able to sample directly to disk IF you
have a RAMfast and certain conditions can be met... mail me if you're
interested, the idea I have is sick but it will probably work.

> What I'd like is a CD quality sample rate that can store upwards of
>three minutes.  Is this possible?

Again, not with the currently available boards for the GS. If you really want
CD quality then you'll need a NeXT or a fairly expensive NuBus card and a Mac
II.

Question -- do you really NEED CD quality sampling?

Todd Whitesel
toddpw @ tybalt.caltech.edu