Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site voder.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!tektronix!hplabs!nsc!voder!gino From: gino@voder.UUCP (Gino Bloch) Newsgroups: net.audio Subject: Re: CD Reflections Message-ID: <634@voder.UUCP> Date: Tue, 15-Jan-85 13:25:13 EST Article-I.D.: voder.634 Posted: Tue Jan 15 13:25:13 1985 Date-Received: Sat, 19-Jan-85 00:19:07 EST References: <15100001@hpfcmp.UUCP> <3411@mit-eddie.UUCP> <1420@hplabs.UUCP> Organization: National Semiconductor, Santa Clara Lines: 16 > > The use of a higher sampling rate (oversampling) is used [to simplify analog filtering] > It seems to me that the disc itself was created with a given sampling rate. > How can a player change this? I wondered the same thing and asked the right person. Fictitious samples are added to increase the number of samples, then digital filtering and analog filtering are applied. Intuitively, you might expect the fictitious samples to be interpolations of the samples already present, but what is done is to intersperse zeros. The subsequent digital filtering makes this OK, but to prove it you have to write `FFT' on your hands with magic markers and then do some hand-waving. Find a friend who actually knows digital signal processing (I don't, as I'm sure you can readily tell) and ask them (see net.nlang) to explain it. -- Gene E. Bloch (...!nsc!voder!gino) Extend USENET to omicron Ceti.