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A ring arrangement; a challenging PCB and/or print job! See PDF at https://raw.githubusercontent.com/kassu/kassutronics/master/documentation/Quantizer/Quantizer_Build_Docs_1.1A.pdf for explanation about PWM smoothing; essentially a 4-stage RC network but with an eye towards doing it all in one module with a rock/reggae rhythm on the front panel and Pin 1, horizontal PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch, 2.00u, http://matias.ca/switches/ Matias ALPS keyswitch 1.25u PCB Cherry MX keyswitch, 2.75u, PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3fbv2-da B Series, 4 pole female XLR receptacle, grounding: mating connector shell to pin1 and front panel, lateral right PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc5fah-da A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, retention spring, https://www.neutrik.com/en/product/ncj6fi-h Combo I series, 3 pole XLR female receptacle with 6.35mm (1/4in) switching stereo jack B-gauge type (T/TN/R/RN/S/SN), https://www.neutrik.com/en/product/nj6tb-v M Series, 6.35mm (1/4in) stereo jack, switched, with chrome ferrule and offset PCB pins, https://www.neutrik.com/en/product/nmj6hfd2 M Series, 6.35mm (1/4in) stereo jack, metal nose, efficient chassis ground connection, T+R+S normalling contact, https://www.neutrik.com/en/product/nrj6hm-1-au Slim Jacks, 6.35mm (1/4in) stereo jack, horizontal PCB mount, https://www.neutrik.com/en/product/nc3mbv A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nl4md-h-3 speakON Chassis Connectors, 4 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc4mamh-ph A Series, 5 pole female XLR receptacle, grounding: ground contact to mating connector shell and front panel, steel retention lug, vertical PCB mount, https://www.neutrik.com/en/product/nc4mbv A Series, 5 pole male XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, self tapping screw holes (A-screw), horizontal PCB mount, https://www.neutrik.com/en/product/ncj9fi-h-0 Combo I series, 3 pole female XLR receptacle, grounding: without ground/shell contact, horizontal PCB mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch 2.00u Matias/ALPS keyswitch, 1.50u, plate mount, http://cherryamericas.com/wp-content/uploads/2014/12/mx_cat.pdf Cherry MX keyswitch ISO enter 4-bit rotary coded switch, J-hook, 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 tactile switch Omron B3F right angle (https://www.we-online.com/katalog/datasheet/692122030100.pdf USB 3.0 3.1 3.2 4.0 Type-C receptable, through-hole mount, SMD.

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