Quantity   Component name
1 × dsp-G1 synth on an 8 pin chip https://dspsynth.eu/webshop/product/dsp-g1-analog-modeling-synthesizer/
2 × Adafruit Trinket M0
1 × 10 uF electrolitic cap
1 × 5V power bank
1 × MIDI keyboard
1 × MIDI controls
2 × USB OTG to USB host cables
2 × USB cables for USB MIDI devices
1 × Battery powered speaker and audio cable
1 × Audio jack
1 × 470 Ohm resistor
2 × 0.1 uF ceramic cap