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SAW 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 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 a medium customarily used for software interchange; or, b) Accompany it with a half threaded nose and offset PCB pins, https://www.neutrik.com/en/product/nmj4hcd2 M Series, 6.35mm (1/4in) stereo jack, switched, gold plated contacts, https://www.neutrik.com/en/product/nmj6hfd2-au M Series, 6.35mm (1/4in) jack receptacle, horizontal pcb mount, replaces NL4MD-H, NL4MD-H-1, NL4MD-H-3, https://www.neutrik.com/en/product/nl4mdxx-h-3 speakON Chassis Connectors, 2 pole chassis connector, grey D-size flange, self tapping screw holes (A-screw), horizontal PCB mount, https://www.neutrik.com/en/product/nc3mbhr B Series, 3 pole female XLR receptacle, grounding: ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3faah1 AA Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3fav B Series, 3 pole female XLR receptacle, grounding: without ground/shell contact, horizontal PCB mount, replaces NL2MD-V, https://www.neutrik.com/en/product/nl2mdxx-v speakON Chassis Connectors, 2 pole chassis connector, black D-size flange, countersunk thru holes, vertical PCB mount, replaces NL8MD-V-1, https://www.neutrik.com/en/product/nl8mdxx-v-3 speakON Chassis Connectors, 4 pole chassis connector, red D-size flange, countersunk thru holes, vertical PCB mount, https://www.neutrik.com/en/product/nc3faav A Series, 3 pole male XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3fah A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, replaces NL4MD-H, NL4MD-H-1, NL4MD-H-3, https://www.neutrik.com/en/product/nl4mdxx-h-3 speakON.

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