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Re: Hardware Speech Systhesis

From: Adam Wozniak <>
Date: Mon, 4 Jan 1999 09:11:39 -0800

 > Through a cheesy little earbud, I doubt you could tell the difference
 > between 8 and 16 bit anyway.

Most people can tell 8 bit -> 16 bit.

Some of the newer PCI soundcards on the market also do 20, 24, and 32 bit
sampling.  I can't tell 16 bit -> 20 bit.  I can tell 16 bit -> 24 bit
for _some_ content, but not all.

Some of the them also do 96 KHz sampling, but why I'm not sure why.  I can't
tell 48 KHz -> 96 KHz.

What bothers me more is that some of the older cards had sampling/playback
rates off by as much as 3%, especially at lower sampling rates (8 KHz).
Things sampled on such a card played back fine on the same card, but
import/export source from/to somewhere else and there was a definate
frequency shift you could really hear.

This also wrecks havok with realtime multimedia streaming applications.

Anyone know a cheap circuit to use a soundcard as an o-scope?  I don't mind
frying a $20 soundcard, but I do mind paying several hundred (or even thousand)
for a decent scope.

--Adam

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