synthesizer

Korg microKorg E.2.1 Error - No Sound, Output Thumps, Service Tests Fail Work Done So Far Power supply recap: Most electrolytic capacitors replaced with equivalents, A lot were out of spec. Power rails now measure stable (no voltage drops noted at any ic's) Service mode testing: Mode 1+3...

I know that ladder filter existed for a while before Bob Moog was a student. I know that he patented his design of ladder type filter. I know that multiple manufacturers were either ripping off his patented design or building very close visually at least own variants. What I do not know is why...

Need help with exponential converter implementation. It will be used for input of synthesizers vco. VCO simulation works with dedicated current source (attachment1) but when i try to add exponential converter (attachment2) no current goes through Q3. Seems like i missing some basic understandig...

Hello, and thanks for reading this post, I have a Roland D-10 Synthesizer that plays all the keys after you power the unit up. But if you press E,F,Gb,G,Ab,A,Bb,B. on the second to lowest octave they play once at a maximum of 127 velocity and sustain at that velocity until the unit is...