[sdiy] FPGA based Synth....

[James Patchell]

Hey...got some more done on the FPGA based synth...(well, synth might be 
exaggerating a bit),,,


I now have 16 oscillators, 16 VCA's and 16 simple ASR type envelope 
generators (with RC type shape to the envelope...ie... 1 - exp(t/T) )....It 
is pretty cool...

I ordered a proto board from Digilent for my Spartan 3E Starter Kit...On 
it, I will put an anti-alias filter, a midi interface, an interface 
connector for the AVR STK501/500 board, some LEDs...and I will have a 
simple Midi digital synth.

As soon as I can I will post the Verilog code, schematics, etc...it looks 
like it uses up about 30,000 gates worth in a Spartan III....and right 
now...It does all sixteen voices in 21 clocks.

         -Jim
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http://www.oldcrows.net/~patchell
http://www.noniandjim.com/
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