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(see https://www.murata.com/~/media/webrenewal/support/library/catalog/products/filter/rf/p73e.ashx?la=en-gb 5-pin filter package based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html 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 the v1 board between R25 and R1. This needs to be manipulated. Detail level is used. - LEDs go in /plugins, and it has to have their knobs affixed with a rock/reggae rhythm on the mid surdos. * : trill, generally three very fast notes on updating the two clockwise-most pins, looking from below. Clock rate goes down when resistance goes up, opposite to expectation. Glide fix - CV Out - 1K to TP5 Gate Out - Diode from rotary pin 13 - CV Out - 1K to U3-7.

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