Xref: utzoo comp.dsp:34 sci.electronics:7902 rec.music.synth:9151
Path: utzoo!attcan!uunet!bloom-beacon!gatech!gitpyr!byron
From: byron@pyr.gatech.EDU (Byron A Jeff)
Newsgroups: comp.dsp,sci.electronics,rec.music.synth
Subject: Digital Mixer Using Burr-Brown 200 Khz ADC
Message-ID: <9206@pyr.gatech.EDU>
Date: 23 Sep 89 15:49:28 GMT
Reply-To: byron@pyr.gatech.edu.gatech.edu (Byron A Jeff)
Organization: Georgia Institute of Technology
Lines: 36

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  |--|      |   |      |  |      |  |      |
-----------  ---------  ---------  --------   --------  --------  --------

With the output being either high quality audio or DAT compatable digital.
The DSP would handle all mixing, EQ, effects, etc.

If samples can be obtained for ~$50 then a box for between $200 to $300
could be realized. If the DSP is fast enough then another ADC could
easily be added for a grand total of 16 channels.

Any comments? Most of the info I have is from "Musical applications for
Microprocessors".

Crossposting is for exposure. 
Redirect the discussion to the appropriate newsgroup.

comp.dsp - Role of DSP processor/algorithms in such a system.
sci.electronics - electonic aspects (analog filters, S/H, ect)
rec.music.synth - applications (for example midi control for setting
mixer/effects parameters, midi controled fades, and the like.)

BAJ
-- 
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