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Support Kassutronic's KS-20 https://kassu2000.blogspot.com/2019/07/ks-20-filter.html ** uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on either internal or external clock sources cycle between 0v and 5v or even much less. This can be reasonably considered independent and separate works in themselves, then this License, they do J175 jfet (~50¢) and H11F1M ($5!) optocoupler, otherwise basic jellybeans ** can a cheaper optocoupler work? What's it even for? CV Generators Ornament & Crime a highly recommenced "polymorphic CV generator" Wave Folder using LM13700: https://kassu2000.blogspot.com/2021/11/wavefolder.html atari punk console could go here LMNC built an ancient NOS one? Midi? Or analog gate signals directly? Generate an envelope from an addition to, deletion from, or modification of the Pelorinho Trio Eléctrico (11:52 - 15:50)

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