Yamaha PSS-270 mod: an Arduino Mega + ESP8266 takes over the YM2413 FM chip and the keys. MIDI in/out, arpeggiator, key menu, live FM tone editor with draggable envelopes, WiFi updates.
arduino esp8266 midi synthesizer chiptune yamaha arduino-mega opll fm-synthesis circuit-bending ym2413 synth-diy diy-electronics fm-synth synth-mod pss-270 pss270 portasound yamaha-pss keyboard-mod
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Updated
Nov 6, 2026 - C++