Re: More digital mixer stuff

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Article #360

#360

From: Byron A Jeff
Date: Tue, 03 Oct 1989 17:54

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In article <1845@draken.nada.kth.se> d88-jwa@nada.kth.se (Jon W{tte) writes:
-In article <9247@pyr.gatech.EDU> byron@pyr.UUCP (Byron A Jeff) writes:
->The only question is what's the sample rate of the mixed signal? It
->would seem to be 8x the original sample rate yes? So for 8 48Khz channels
->I'd need a 384 Khz DAC. Ouch! 
-
-No, not really. You apply a digital filter on the signal, and then use
-each eigth sample. Yes, it'll work ! Someone said that you should apply
-this BEFORE you fed the signal to the DSP, but then you would have no
-channel separation (the channel separatio is in the time domain if you
-interleave the samples, and the filter truly messes this up) and all the
-channels would come out mixed equally.

'Wow!' he exclaims incredulously. Would you please go into a little more
detail on how this black magic works? Also is it possible to scale
the samples for individual channel volume control before using the filter?

-
-		h+@nada.kth.se

BAJ (the ever amazed)
-- 
Another random extraction from the mental bit stream of...
Byron A. Jeff
Georgia Tech, Atlanta GA 30332
Internet:	byron@pyr.gatech.edu  uucp:	...!gatech!pyr!byron

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References: <9238@pyr.gatech.EDU> <7905@microsoft.UUCP> <9247@pyr.gatech.EDU> <1845@draken.nada.kth.se>

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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!gatech!gitpyr!byron
From: byron@pyr.gatech.EDU (Byron A Jeff)
Newsgroups: comp.dsp
Subject: Re: More digital mixer stuff
Message-ID: <9264@pyr.gatech.EDU>
Date: 3 Oct 89 17:54:45 GMT
References: <9238@pyr.gatech.EDU> <7905@microsoft.UUCP> <9247@pyr.gatech.EDU> <1845@draken.nada.kth.se>
Reply-To: byron@pyr.UUCP (Byron A Jeff)
Organization: Georgia Institute of Technology
Lines: 26

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