Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/26/83; site ihuxk.UUCP Path: utzoo!linus!philabs!seismo!harpo!floyd!vax135!ariel!hou5f!orion!houca!hogpc!houxm!ihnp4!ihuxk!rs55611 From: rs55611@ihuxk.UUCP Newsgroups: net.audio Subject: Re: severe beating Message-ID: <358@ihuxk.UUCP> Date: Wed, 15-Jun-83 15:54:39 EDT Article-I.D.: ihuxk.358 Posted: Wed Jun 15 15:54:39 1983 Date-Received: Thu, 16-Jun-83 22:39:07 EDT References: <470@ihuxr.UUCP> Organization: BTL Naperville, Il. Lines: 23 In regard to the comment that CDs don't have the bandwidth for third and fourth harmonics: But they do! The highest fundamental on a piano keyboard is 4186 Hz. (Csub8). Thus, a CD system with a bandwidth of 20 kHz (>40 kHz., but most likely ~50 kHz. sampling rate) will accurately reproduce the third and fourth harmonics of the highest pitch piano note. Furthermore, this is higher in frequency than the highest notes produced by flutes, piccolos, harps, clarinets, soprano saxes, etc. (fundamentals of these are all lower than the highest C on a piano). As another comparison, an operatic soprano upper limit is about 1050 Hz (~Csub4), so that high order harmonics will all fall below 20 kHz. I would submit that any discoloration heard at CES was likely in the amps and/or speakers, or else there were hardware problems in the system that resulted in lost bits, and therefore excessive quantization distortion. (The max. pitch info was pulled from a book on human factors topics, including speech and hearing, called Human Information Processing, by Lindsay and Norman.) Bob Schleicher ihuxk!rs55611 Bell Labs, Naperville, Ill.