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For yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF 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 (or derived from) the Work or (ii) ownership of such damage. The MIT License Copyright (C) 2016 Felipe da Cunha Gonçalves Copyright 2015 Yohann Coppel Licensed under the Simplified BSD License Copyright (c) 2011-2018, Christopher Jeffrey (https://github.com/chjj/) Permission is hereby granted, free of charge, to any person obtaining ISC License Copyright (c) 2020 Masaaki Goshima.

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