[sdiy] Hello

[Pete Niedermayr]

Hello, Couple of questions and comments. Does anyone have or could point me to plans for a simple audio mixer. My DAW is growing now to about 6 PC's and 8 midi synths plus I plan to build a synth or 2 or 3 in the somewhat near future. I don't want filtering and I don't think I need volume pots since all of the devices can be controlled by midi. I just need a stereo mixer for monitoring with a 2nd buss to send to a PC sound card for recording. Way back in the mid seventies was a TV show that aired Friday nights called the Midnight Special it featured performances of the pop groups popular at the time. One Friday I was watching it with my cousin and he noted "Oh that's a synthesizer" "What's a synthesizer?" I asked "Any sound that doesn't sound like the instruments you see" he replied. And there lit a little fire in my mind. Later that year I start junior high and my homeroom was in the library, where I happened upon Radio Electronics magazine's articles about building the PAIA 2700.  so I think(maybe) the first synth I going to build is going to be the "Scary 2700" (VCO,Noise,VCBPF,VCLPF,VCA,Glide,LFO,ADSR,AR) My idea (Scary) is to have at the input of each filter 6 VCA's summed together(Ramp,Triangle,Pulse-from the VCO,Noise,Feedback from the filter,and the output of the other filter)and at the input of the finale VCA- 6 VCA's(Ramp,Triangle,Pulse-from the VCO,Noise,VCBPF out,VCLPF out)---maybe not, but I like the idea of using multiple VCA's for wave shaping. Next question. Does anyone have any good CV mixer schematics (scaling,inverting etc.). Also, has any one played with the ASM 1 VCO can it be tuned down to be a VCLFO? Any plans to put up a web page or ftp site to exchange schematics,PCB artwork,Etc.. I have a dozen or so issues of POLYPHONY that I would be willing to scan and post (providing it doesn't step on anyone's Copyright toes.)










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