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- Path: sparky!uunet!mcsun!uknet!yorkohm!dpr
- From: dpr@ohm.york.ac.uk (David Rossiter)
- Newsgroups: comp.sys.sgi
- Subject: Re: Audio on the Personal Iris
- Keywords: audio, PI, MULAW, conversion
- Message-ID: <1992Aug20.193903.12272@ohm.york.ac.uk>
- Date: 20 Aug 92 19:39:03 GMT
- References: <1992Aug20.123614@disuns2.epfl.ch>
- Organization: Electronics Department, University of York, UK
- Lines: 23
-
- In <1992Aug20.123614@disuns2.epfl.ch> matomira@disuns2.epfl.ch (Fernando Mato Mira) writes:
-
- >I have a couple of questions concerning the audio capabilities of the PI.
-
- > I have some MULAW samples
- >which I convert into
- >16-bit linear, and then covert to 8-bit linear just by dividing by 256
- >(no fancy filtering, sorry). All I get is noise. I hoped to get
- >something horribly sounding but not so much. If the filtering is the
- >problem, do you think I will manage to do the conversion in real-time?
- >Any pointers to libraries?
-
- It's probably worth looking at a program called 'sox' which actually
- has nothing to do with smelly feet... it's a sound transformation
- program (command line driven) which lets you re-sample, convert
- between many different formats, bandpass/lowpass filter, add
- effects such as echo + vibrato, etc. The source code is available
- is you want to add to it... available via anon ftp from
- ftp.cwi.nl in /pub
-
- Might be useful
-
- Dave
-