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1 total messages Started by Byron A Jeff Sat, 23 Sep 1989 15:49
Digital Mixer Using Burr-Brown 200 Khz ADC
#267
Author: Byron A Jeff
Date: Sat, 23 Sep 1989 15:49
36 lines
2062 bytes
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
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