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From: jlg@lanl.ARPA
Newsgroups: net.audio
Subject: Re: CD Musings
Message-ID: <19963@lanl.ARPA>
Date: Mon, 21-Jan-85 13:50:38 EST
Article-I.D.: lanl.19963
Posted: Mon Jan 21 13:50:38 1985
Date-Received: Thu, 24-Jan-85 05:44:18 EST
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Organization: Los Alamos National Laboratory
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> > ...However, musical instruments do not
> > produce pure sine wave tones, but rather complex waveforms with high amounts
> > of harmonics.  Since the third harmonic of a 14 kHz cymbal or bell note is
> > 42 kHz, 22 kHz is nowhere near adequate for proper reproduction.
> 
> Prove to me that you can HEAR 42 KHz and I'll believe you.

More to the point - even if some people CAN hear sounds with frequencies
significantly higher than 20kHz (I don't believe 42kHz either), few stereo
components and NO speakers (that I'm aware of) are available to reproduce
such sounds accurately.  The roll-off of even the most expensive speakers
above 20kHz is rapid, and most will introduce phase and other distortions
above this level as well.  If you're listening for a 42kHz harmonic you
can keep listening - the 28kHz second is probably not even there.

J. Giles