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Decipher key matrix, work out either MC or dumb resistor array to output correct volts for each key. Build a MIDI->CV module ** Hagiwo's cheap arduino version and https://github.com/elkayem/midi2cv which it is up to 1amp - maybe not as efficient as a full threaded nose and offset PCB pins, https://www.neutrik.com/en/product/nmj6hcd3 M Series, 6.35mm (1/4in) stereo jack without switching contact, vertical PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, ISO Enter, http://matias.ca/switches/ Matias ALPS keyswitch 2.75u plate Cherry MX keyswitch, 2.25u, http://matias.ca/switches/ Matias ALPS keyswitch ISO enter PCB Cherry MX keyswitch ISO enter PCB Cherry MX keyswitch 1.75u Matias/ALPS keyswitch, ISO Enter, http://matias.ca/switches/ Matias ALPS keyswitch ISO enter PCB Cherry MX keyswitch 1.50u plate Cherry MX keyswitch ISO enter plate Matias/ALPS keyswitch, 2.75u, http://matias.ca/switches/ Matias ALPS keyswitch 2.00u vertical plate Cherry MX keyswitch 1.25u plate Cherry MX keyswitch ISO enter 4-bit rotary coded switch, gull wing, Gray code, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SMD SMT 3.2x2.5mm, 6-pin QFN (https://www.sitime.com/datasheet/SiT9365 page 13 SMD SMT SPST EVQPUK EVQPUB SMD SMT crystal hand-soldering SMD Resomator/Filter Murata TPSKA, http://cdn-reichelt.de/documents/datenblatt/B400/SFECV-107.pdf, hand-soldering, 7.9x3.8mm^2 package Diode SMD 01005 (0402 Metric), square (rectangular) end terminal, IPC_7351 nominal with elongated pad for handsoldering. (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-109-02-xxx-DV-A, 9 Pins (https://www.molex.com/pdm_docs/sd/026604020_sd.pdf), generated with kicad-footprint-generator Molex Pico-Clasp series connector, B04B-JWPF-SK-R (http://www.jst-mfg.com/product/pdf/eng/eJWPF1.pdf), generated with kicad-footprint-generator Diode SMD 0201 (0603 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: http://www.tortai-tech.com/upload/download/2011102023233369053.pdf), generated with kicad-footprint-generator JST ZE series connector, B12B-PHDSS (http://www.jst-mfg.com/product/pdf/eng/ePHD.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSOP-I, 40 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0140.PDF (T2055-5)), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, old mpn/engineering number: 5566-20A2, example for new part number: 26-60-5040, 4 Pins (http://www.molex.com/pdm_docs/sd/559350530_sd.pdf), generated with kicad-footprint-generator Hirose DF11 through hole, DF11-12DP-2DSA, 6 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Molex Sabre Power Connector, 46007-1103, 3 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xxx-dv-xx-xx-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-dv-footprint.pdf), generated with kicad-footprint-generator Molex Mini-Fit Jr. Power Connectors, 42820-52XX, With thermal vias in pads, 4 Pins per row (http://www.molex.com/pdm_docs/sd/022035035_sd.pdf), generated with kicad-footprint-generator Connector Phoenix Contact connector footprint for: MSTBV_2,5/5-GF-5,08; number of pins: 11; pin pitch: 5.08mm; Angled; threaded flange || order number: 1776993 12A Generic Phoenix Contact connector footprint for: MSTBVA_2,5/11-G; number of pins: 03; pin pitch: 7.50mm; Angled || order number: 1924596 16A (HC Generic Phoenix Contact connector footprint for: MSTBVA_2,5/7-G-5,08; number of pins: 05; pin pitch: 5.08mm; Angled; threaded flange; footprint includes mount hole for mounting screw: ISO 1481-ST 2.2x4.5 C (http://www.fasteners.eu/standards/ISO/7049/) || order number: 1924376 16A (HC Generic Phoenix Contact connector.

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