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About PWM smoothing; essentially a 4-stage RC network but with an eye towards doing it all in one module with lots of analog drum voices; based heavily on Moritz Klein's schematic, with features added from Skull and Circuit's VCA v1.3. D952ec97f3 Go to file 56529bef3a Updates from real TL0x4, fix pots being backwards, tighten up schematic, fit letter instead of latch, https://www.neutrik.com/en/product/nc3faav2-0 AA Series, 3 pole female receptacle, grounding: separate ground contact to mating connector shell and front panel, lateral right PCB mount, https://www.neutrik.com/en/product/nc3mah A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 1.75u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch 1.50u PCB Cherry MX keyswitch, ISO Enter, http://matias.ca/switches/ Matias ALPS keyswitch 2.75u PCB Cherry MX keyswitch 2.00u Matias/ALPS keyswitch, ISO Enter, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 1.00u, http://matias.ca/switches/ Matias ALPS keyswitch 1.00u plate Cherry MX keyswitch 1.50u plate Cherry MX keyswitch ISO enter 4-bit rotary coded switch, gull wing, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf 4-bit rotary coded switch, through-hole, https://www.nidec-copal-electronics.com/e/catalog/switch/sh-7000.pdf SPST Off-On Pushbutton, 1A, 30V, CW Industries P/N GPTS203211B, http://switches-connectors-custom.cwind.com/Asset/GPTS203211BR2.pdf SPST button switch with LED, generic K switch spdt single-pole double-throw spdt ON-ON horizontal MEC 5G single pole normally-open tactile switch https://www.ckswitches.com/media/1972/ksc6.pdf CK components KSC7 tactile switch 6mm ALPS SKHH right angle tht smd hybrid Harting har-flexicon series connector, B16B-PH-K (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py HVQFN, 24 Pin (https://semtech.my.salesforce.com/sfc/p/#E0000000JelG/a/44000000MDkO/lWPNMeJClEs8Zvyu7AlDlKSyZqhYdVpQzFLVfUp.EXs), generated with kicad-footprint-generator Molex Mini-Universal MATE-N-LOK, old mpn/engineering number: 5566-22A2, example for new part number: 26-60-5140, 14 Pins per row (http://suddendocs.samtec.com/prints/hle-1xx-02-xx-dv-xe-xx-mkt.pdf, http://suddendocs.samtec.com/prints/hle-thru.pdf), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 55560-0501, 50 Pins (http://www.molex.com/pdm_docs/sd/5024301410_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py VQFN, 28 Pin (http://www.onsemi.com/pub/Collateral/601AE.PDF), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for a single 0.75 mm² wires, reinforced insulation, conductor diameter 0.9mm, outer diameter 2mm, outer diameter 2.1mm, size source Multi-Contact FLEXI-xV 1.0 (https://ec.staubli.com/AcroFiles/Catalogues/TM_Cab-Main-11014119_(en)_hi.pdf), bend radius 3 times outer diameter, generated with kicad-footprint-generator JST JWPF series connector, B9B-PH-SM4-TB (http://www.jst-mfg.com/product/pdf/eng/ePH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py DFN, 6 Pin (https://www.diodes.com/assets/Package-Files/U-DFN2018-6.pdf), generated with kicad-footprint-generator Molex KK 396 Interconnect.

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