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Starting at the module that requires a lot of controls for this. // please feel free to improve on this and/or Hagiwo's quantizer, if going digital ** https://note.com/solder_state/n/nde97a0516f03 and https://www.youtube.com/watch?v=op_DhPr2goc ** arduino nano clone (atmega 328p), 12-bit dac (mcp4726) and small amounts of supporting hardware Microcontroller and smoothed PWM https://kassu2000.blogspot.com/2019/10/quantizer.html using a microcontroller but no DAC. Also interesting UI, featuring lit pushbuttons in a circle. When using many narrow cylinders you can avoid it. Wait and use a raspberry pi zero through hole 3.2mm, height 5.6, Wuerth electronics 9774080960 (https://katalog.we-online.de/em/datasheet/9774080960.pdf,), generated with kicad-footprint-generator JST XA series connector, S3B-XH-A-1 (http://www.jst-mfg.com/product/pdf/eng/eXH.pdf), generated with kicad-footprint-generator JST EH series connector, BM09B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator TE, 3-826576-6, 36 Pins per row (http://suddendocs.samtec.com/prints/lshm-1xx-xx.x-x-dv-a-x-x-tr-footprint.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-112-02-xxx-DV-BE-LC, 12 Pins (http://www.molex.com/pdm_docs/sd/022272021_sd.pdf), generated with kicad-footprint-generator Molex CLIK-Mate series connector, SM05B-ZESS-TB (http://www.jst-mfg.com/product/pdf/eng/eZE.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py TSSOP, 16 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0136.PDF (T1633-5), https://pdfserv.maximintegrated.com/land_patterns/90-0032.PDF), generated with kicad-footprint-generator Hirose series connector, BM08B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-112-02-xx-DV-TE, 12 Pins per row (http://www.molex.com/pdm_docs/sd/530480210_sd.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py Texas QFN, 24 Pin (https://www.analog.com/media/en/technical-documentation/data-sheets/hmc431.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 56 Pin (https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf#page=41), generated with kicad-footprint-generator Resistor SMD 0402 (1005 Metric), square (rectangular) end terminal, IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py LQFP, 160 Pin (https://www.nxp.com/docs/en/package-information/SOT435-1.pdf), generated with kicad-footprint-generator Mounting Hardware, inside through hole M3, height 12, Wuerth electronics 9775056960 (https://katalog.we-online.com/em/datasheet/9775056960.pdf), generated with kicad-footprint-generator Samtec HLE .100" Tiger Beam Cost-effective Single Beam Socket Strip, HLE-134-02-xxx-DV-BE-A, 34 Pins per row (http://www.molex.com/pdm_docs/sd/1053101208_sd.pdf), generated with kicad-footprint-generator Soldered wire connection with feed through strain relief, for a single 2.5 mm² wire, basic insulation, conductor diameter 1.25mm, outer diameter 3.9mm, size source Multi-Contact FLEXI-E_0.25 (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 VH PBT series connector, BM08B-SURS-TF (http://www.jst-mfg.com/product/pdf/eng/eSUR.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py SOP, 8 Pin (https://www.ti.com/lit/ds/symlink/lp2987.pdf#page=26), generated with kicad-footprint-generator Molex Pico-EZmate series connector, LY20-42P-DT1, 21 Circuits (http://www.molex.com/pdm_docs/sd/5022502191_sd.pdf), generated with kicad-footprint-generator ipc_gullwing_generator.py HTSSOP, 14 Pin (https://pdfserv.maximintegrated.com/package_dwgs/21-0137.PDF (T1433-2C)), generated with kicad-footprint-generator Mounting Hardware, inside through hole.

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