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From: c6787903@scheme.cs.ubc.ca
Newsgroups: comp.sys.next
Subject: next programming (sound)
Message-ID: <1991Feb19.202352.8699@scheme.cs.ubc.ca>
Date: 19 Feb 91 20:23:52 GMT
Sender: news@scheme.cs.ubc.ca
Organization: Scheme Lab, Computer Science, UBC, Vancouver, B.C., Canada
Lines: 15

Hi!

I've got a couple of programming problems:

a) I want to be able to change the replay speed of CODEC sounds.
How do I do this?
At present I get a pointer to the sound data, and then I a make a new SNDstruct. Into that sound struct I copy all my old data, duplicating samples if I want to slow things down, and cutting some if I want to speed things up.
This seems totally crazy, since all I want is tell the DSP to replay slower/faster.
b) Is there some way of getting a pointer to the samples that the DSP is processing while a sound is being played? Goal here would be instant rewind/replay/ffwd etc. I figure there must be some way for the DSP to keep track of the memory it's reading from, so why not alter that pointer?
c) What exactly is the MULAW_SQUELCHED format (= I want the GORY details!)? Goal is to slow text down for a typist: scan through the sound, find all encoded silences, strech them as necessary, then play.
d) What is the .wn file format? Is there a wn2ascii out there?

Thanks.

(please E-mail me since I usually don't read the news: c6787903@scheme.cs.ubc.ca)