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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!doug.cae.wisc.edu!loj
- From: loj@cae.wisc.edu (Lo Jeffrey)
- Subject: Why filter D/A output?
- Organization: U of Wisconsin-Madison College of Engineering
- Date: 8 Nov 92 22:29:10 CST
- Message-ID: <1992Nov8.222911.27702@doug.cae.wisc.edu>
- Lines: 11
-
- I was wondering if someone out there could answer a question about filtering
- the output of a D/A converter. Analog filtering, that is. Why do it?
- If you can't hear anything above 20KHz anyway, why bother going through
- all the trouble of getting rid of the noise up there? Maybe that's
- cutting it a little close. But most of the D/A converters made today
- have 8X oversampling or more which puts the noise up around 160KHz.
- Even if you could hear this, I doubt that your equipment could reproduce
- it. What am I missing here?
-
- Jeff Lo
- loj@cae.wisc.edu
-