[sdiy] Hello

[James Patchell]

Welcome aboard...a pretty familiar story, except for the fact I was in 
College when the Paia 2700 appeared in Radio Electronics...you will find 
that a large number of us got started building modules from that article...

As far as CV mixers and mixers in general...they have been discussed in the 
past...I don't think I have any circuits posted on my website (see below) 
of what you want, but you never know...take a look...

The asm-1 (Terry Michaels VCO) will tune over a very wide range....1 
million to 1.  Generally, for an LFO however, I generally use a much cruder 
circuit, but the ASM-1 VCO will do LFO duty in a pinch.

As far as posting scans of Polyphony on the internet, I would ask John 
Simonton first ( http://www.paia.com ), since he is the copyright holder 
for Polyphony and he still sells back issues...

Speaking of back issues, you should probably see about purchasing the back 
issues of Electronotes...I don't seem to be able to find the URL, somebody 
else can probably supply that.  It costs about $300 or so and you get a 
stack of paper about two feet high, but there is a lot of valuable 
information in those.  I was never sorry I spent the money.  I would be 
willing to bet every issue you asked about below is discussed somewhere in 
Electronotes.

Anyway, welcome to the group...

At 10:35 PM 11/11/2003 -0600, Pete Niedermayr wrote:
>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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         -Jim
***************************************************
I'm a man
But I can change
If I have to
I guess.

Man's Prayer
Red Green

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