"RPi Synth: Multi-DX7/TX816 Style"
TL;DR
Simple DIY ElectroMusic Projects has released a complete DIY modular design for simulating the classic 80s Yamaha TX816 DX/FM modular digital synthesizer using a Raspberry Pi and custom PCBs. The design includes a user interface for four of the eight channels, a GY-PCM5102 I2C DAC, and MIDI connectors. The MiniDexed firmware running bare-metal on a Raspberry Pi allows for a compatible synth without breaking the bank.
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