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