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- Path: sparky!uunet!think.com!rpi!usc!elroy.jpl.nasa.gov!nntp-server.caltech.edu!jsurace
- From: jsurace@cco.caltech.edu (Jason A. Surace)
- Newsgroups: comp.sys.amiga.audio
- Subject: Re: Audio Samplers
- Date: 21 Dec 1992 22:24:47 GMT
- Organization: California Institute of Technology, Pasadena
- Lines: 42
- Message-ID: <1h5g7fINN4oh@gap.caltech.edu>
- References: <1992Dec18.081841.29669@u.washington.edu>
- NNTP-Posting-Host: punisher.caltech.edu
-
- maji@carson.u.washington.edu (Ji Ma) writes:
-
- >I brought a audio sampler (ProSound Designer) which sampler at maximum 28KHz
- >which way above the normal hearing range (5Hz-10KHz). But the sampled sound
- >is very poor than normal cassette deck player.
-
- >My question is what is best 8-bit sampler can do?
-
- >CD-quality
- >cassette deck quality
- >or even lower
-
- >One thing I noticed is that it sample little better on sound source from
- >cassette deck than from CD. Why?
-
- >Any idea?
-
- >Thanks
-
- >Maji
-
- Actually, I thought that this was mostly a dynamic range problem. That is, you
- can sample any frequency you want (as long as your sampling rate is high enough
- that is, 2x (by Nyquist) the top frequency you want to sample; admittedly a
- problem on slower stock Amigas), and that this was unaffected by the 8-bit-ness
- of the sound chip. What the 8 bits does is limit you to a very small dynamic
- range, comparable to that of a cheap cassette player. The reason sampled tapes
- sound better than CD's is that the dynamic range of the original material is
- compressed when recorded professionally on cassette tapes so that you actually
- get all the material on the narrow range of the cassettes. This doesn't happen
- with CD's bcause they have so much more range. When you try to sample CD's,
- you'll lose either all the soft stuff, or clip the loud stuff because you
- can't deal with their incredible dynamic range.
-
-
- - Jason Surace
-
- jason@ipac.caltech.edu
-
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-