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- Newsgroups: rec.audio
- Path: sparky!uunet!walter!porthos!hera!gfl
- From: gfl@herahera.cc.bellcore.com (lenahan,grant f)
- Subject: Re: Digital critics - sampling argument is nonsense
- Organization: Bellcore, Livingston, NJ
- Date: Thu, 21 Jan 93 18:31:34 GMT
- Message-ID: <1993Jan21.183134.12330@porthos.cc.bellcore.com>
- Summary: No, No, NO!!!!!
- References: <1993Jan21.165946.47693@watson.ibm.com>
- Sender: netnews@porthos.cc.bellcore.com (USENET System Software)
- Lines: 71
-
- (Cevin M Zellers ) writes:
- > Grant,
- >
- > You claim it is 'all below' 22.05 KHz,
-
- Tis not my claim, but a mere clarification of Shannon's work.
-
- > but John Galloway has a good
- > argument here:
- >
- > With a 22KHz cutoff frequency, the system would not differentiate
- > between a 20KHz sine wave and a 20KHz sawtooth
-
- Exactly, because a 20 kHz saw-tooth has components above
- 20 kHz (eg: superaural) which are defined as "out of band".
- Since they are above 20 kHz, most recording media don't
- record them, and only a minute fraction of the (human)
- population can hear them. Most > 20kHz stuff is distortion,
- BTW, and best truncated.
-
- >, i.e. the sawtooth
- > would look like the sine-wave anfter the recording low-pass filter
- > input.
-
- I think you may have inadvertantly made my point.
- >
- > Can the ear differentiate between a 20KHz sine wave and a 20Khz sawtooth?
-
- In a word, No. Maybe a few canine-inspired out there, but that's it.
-
- > If so, us Analog critics may have an achilles heel
-
- I'm confused. Are you a critic of analog?
-
- I certainly hope they all have achilles tendons, anyway. Tough to
- walk otherwise. :-) :-)
-
- >
- > A confused Cevin
-
- Look guys, read "Communications in the presence of noise",
- IEEE 19??, Shannon. It's neither new, nor high-tech, nor
- controversial, nor magic. And I'm a very open-eared high-
- ender. But I'm also an engineer, and I design audio circuits
- to work. Therefore I have to seperate the wheat from the
- chaff. This line of reasoning is chaff, and distracts
- us from the wheat.
-
-
- Doesn't it bother anyone that both a <insert favorite garbage
- brand here> $89 CD player and a ML No. 30 ($13,995) both use
- the same standard, yet acheive different results? That performance
- improves drastically every 18 months or so? All based on this
- "terrible" standard?
-
- Now 16-bit linear encoding is kinda wasteful, admittedly.
- More samples, or bigger ones, could have been scrunched into
- the same data rate using perceptual coding methods like
- those applied in MPEG. But it isn't _bad_. In fact I prefer
- the Levinson No. 30 to a certain review mag gurus Versa 1.0.
- Given convenience, durability, lack of set-up, and pending
- improvements, that ain't bad, is it?
-
- IMNSHO (In my not so humble opinion).
-
- Grant
- gfl@hera.cc.bellcore.com
-
-
- sp: guy selling hafler - email me SVP
-
-