A to Synth
Wednesday, August 6, 2025
Testing frequency changes related to pulse width
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Update: Solved - it is not pulse width that is the issue, it's the pulse amp CV, just as in the waveshaper The AS3340 suffers from a p...
Friday, August 1, 2025
Improved CV inputs for VCO
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As mentioned earlier, I'm not satisfied with how the VCO CVs work. Noise on the CV probably has a higher effect on the pitch than necess...
Cem3340 four trimmer tuning
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I can’t remember if I’ve written about this before, but there is apparently a way of tuning the CEM3340 (and AS3340) that is done in a singl...
Monday, July 28, 2025
Lm13700 equivalents
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The AK317DC and NE5517 are transconductance amps compatible with the LM13700. Nice to know!
Monday, July 7, 2025
Debugging VCO Pitch unstability continued 4 - selected solution
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I've officially come to the conclusion that I'm not able to make the noise level any better at the moment. I've ended up at a po...
Saturday, June 14, 2025
Debugging VCO Pitch unstability continued 3
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Aaaaand testing continues. NB: Most measurements are now with the VCO connected to power ground. Reducing pw to 25% to see if it affects the...
Thursday, June 12, 2025
Debugging VCO Pitch unstability continued 2
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Testing continues. First up: Disconnecting all waveshaper outputs: Disconnecting pulse, saw, saw inv, sine, triangle, sub square 1 and 2, su...
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