Klarinet Archive - Posting 000376.txt from 2002/09

From: Jeremy A Schiffer <schiffer@-----.edu>
Subj: RE: [kl] MP3 - WAV - CD
Date: Thu, 19 Sep 2002 21:45:43 -0400

As I understand it:

A WAV file is exactly that: the sin wave of the sound vibrations being
recorded.

CD audio format is the inverse: 1/sin.

MP3 files are compressed versions of the WAV file. Certain frequencies are
removed, based on a sophisticated algorithm; the amount of frequencies
varying by the compression amount (when you encode MP3 files, you choose
how much compression you want). A higher compression rate will yield a
lower quality file because more frequencies are missing.

I hope that's clear, and I hope that's right. Any recording engineers or
physicists please feel free to correct me...

-Jeremy Schiffer

On Thu, 19 Sep 2002, Mark Charette wrote:

> They're all a digital representation of the original recorded sound.
>
> -----Original Message-----
> From: William Wright [mailto:w9wright@-----.net]
>
> I could read a book, of course..... there must be some difference
> between WAV and MP3 and CD, or they wouldn't exist separately; and yet
> they must also share enough in common that a single device can play them
> all.
>
>
> ---------------------------------------------------------------------
>

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Jeremy A. Schiffer
AcIS Security Administrator
Columbia University
212-854-2903
AcIS Nextel *75

Please direct all computer security related queries to
security@-----.

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