Xref: utzoo comp.dsp:155 sci.electronics:8016 Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!gatech!gitpyr!byron From: byron@pyr.gatech.EDU (Byron A Jeff) Newsgroups: comp.dsp,sci.electronics Subject: Re: Digital Mixer Using Burr-Brown 200 Khz ADC Keywords: DSP, Mixer Message-ID: <9240@pyr.gatech.EDU> Date: 29 Sep 89 22:15:56 GMT References: <9231@pyr.gatech.EDU> <1989Sep29.054029.1605@ccu.umanitoba.ca> Reply-To: byron@pyr.UUCP (Byron A Jeff) Organization: Georgia Institute of Technology Lines: 54 In article <1989Sep29.054029.1605@ccu.umanitoba.ca> rahardj@ccu.UManitoba.CA (Budi Rahardjo) writes: >> [This is my diagram] >>----------- --------- --------- -------- -------- -------- -------- >>|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 ? My understanding from a previous message is that the S/H is built in. As for analog multipexors and filters I'm an ingnorant novice looking for reccomendations. Any suggestions? >Are they fast enough ? I don't know. >How do you control the mixer ? By modifying parameters of the DSP ? >Can you control each channels ? Through MIDI for me. I'm in the process of building the ultimate Midi-Merger, sequencer, drum machine and adding mixer control is no problem. I'm am a novice to DSP (that's why I read the newsgroup with great interest) but with a M.S. in C.S. I think I can handle the programming and the math. Modifying the DSP parameters through MIDI is the plan. How much control over each channel I get depends on the processing power (I figure I'll get this in a bit when I get to comp.dsp) but having individual channel control would be desirable. >Are you going to store /buffer the data in RAM before process them >with the DSP or just pass them thru ? Again it depends on the speed of the processor and the types of effects I'm trying to get. I figure I may have to buffer a bit (up to 16K x 24 bits) but I don't perceive that as a real big problem. >Well your design is possible, but I don't think that's an easy job.. That's the kind of data points I'm trying to gather. If I can put it together in a handful of weekend for $250-$300 (simplified by the fact I have access to a DSP evaluation board) then I'll do it. Otherwise I'll leave it to some genius to do. I'm looking at it just as a hobby project. >Budi Thanks for the comments. Keep 'em coming! 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