Article View: rec.audio
Article #1603Re: My CD player is running slow! (!)
From: Ian Newman
Date: Tue, 05 Jun 1990 12:38
Date: Tue, 05 Jun 1990 12:38
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In article <55024@microsoft.UUCP> gordonl@microsoft.UUCP (Gordon LETWIN) writes: >> ...Pitch-shifting in the >> digital domain is a fairly ugly computational process, usually handled by >> high-speed DSP chips. > >This is wrong. Pitch shifting is easy. My first CD player was an >inexpensive one and it had a pitch adjustment control on it. It's my >guess that you can pitch shift just by changing the rate at which you >feed samples to the DtoA convertor. This is wrong. Pitch shifting by spinning a CD faster is impossible. If anythingit would only play the music faster, but at the same pitch. If your CD player did pitch shifting, it could only have done it at the analogue output stage, unless it had the appropriate DSP hardware in it, which I doubt. -- ------------------------------------------------------------- Ian Newman, STC Telecommunications Ltd., NMEC (Dept. 30770), Oakleigh Road South, New Southgate, London N11 1HB. <iann@tcom.stc.co.uk>
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!mailrus!uunet!mcsun!ukc!stc!iann From: iann@tcom.stc.co.uk (Ian Newman) Newsgroups: rec.audio,sci.electronics Subject: Re: My CD player is running slow! (!) Message-ID: <89@rhum.tcom.stc.co.uk> Date: 5 Jun 90 12:38:34 GMT References: <1990Jun2.182334.21396@athena.mit.edu> <6378.26693284@umiami.miami.edu> <55024@microsoft.UUCP> Sender: news@tcom.stc.co.uk Reply-To: iann@tcom.stc.co.uk (Ian Newman) Organization: STC Telecoms, London N11 1HB Lines: 19