Xref: utzoo comp.dsp:142 sci.electronics:8010 rec.music.synth:9250
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!ubc-cs!alberta!ccu!rahardj
From: rahardj@ccu.umanitoba.ca (Budi Rahardjo)
Newsgroups: comp.dsp,sci.electronics,rec.music.synth
Subject: Re: Digital Mixer Using Burr-Brown 200 Khz ADC
Summary: My questions
Keywords: DSP, Mixer
Message-ID: <1989Sep29.054029.1605@ccu.umanitoba.ca>
Date: 29 Sep 89 05:40:29 GMT
References: <9231@pyr.gatech.EDU>
Reply-To: rahardj@ccu.UManitoba.CA (Budi Rahardjo)
Organization: University of Manitoba, Winnipeg, Manitoba, Canada
Lines: 26

>From alberta!ubc-cs!uw-beaver!cornell!mailrus!cwjcc!gatech!gitpyr!byron Fri Sep 29 00:29:20 CDT 1989
>[This is a repost. I got absolutly no response to the first posting.]
>How difficult a proposition would it be to use this BB ADC to build a
>multi-channel digital mixer? I haven't read the specs on it yet (I will
>today at the Tech library) but if it's dual 200Khz ADC then it should
>be possible to sample 8 audio channels at CD (44.1 Khz) or DAT (48 Khz)
>quality. So how feasible is something like this:

-----------  ---------  ---------  --------   --------  --------  --------
|8        |--|Analog |--|Filters|--|      |   |      |  |      |  |      |
|Audio    |--|Multi- |  |  and  |  | ADC  |---| DSP  |--| DAC  |--|Filter|
|channels |--|plexors|--|  S/H  |--|      |   |      |  |      |  |      |
-----------  ---------  ---------  --------   --------  --------  --------

Any comments?

I've questions :
What type of Analog Multiplexors ,Filters, S/H are you going to use ?
Are they fast enough ?
How do you control the mixer ? By modifying parameters of the DSP ?
Can you control each channels ?
Are you going to store /buffer the data in RAM before process them
with the DSP or just pass them thru ?
Well your design is possible, but I don't think that's an easy job..

Budi