There are 3 repositories under yamaha topic.
Mega Drive/Genesis core written in Verilog
The KWP2000 is a communications protocol used for on-board vehicle diagnostics systems (OBD) by Suzuki (SDS), Kawasaki (KDS), Yamaha (YDS), Honda (HDS) and possibly more. It is standardized by ISO 14230
A node module to control your yamaha receiver
Sega Mega Drive/Sega Genesis emulator that emphasises portability.
FM synthesiser based on emulated Yamaha YM chips (OPL, OPM and OPN series)
homebridge-plugin for Yamaha AVR. Audio Receiver Accessory with Power, Input, Volume & Remote Control
Group MusicCast Speakers with Home Assistant
Sound Card for the ISA (8bit) bus sporting Sound Blaster / Sound Blaster PRO emulation via ES688F chip, and a real Yamaha OPL3 FM Synth. It's also completely jumper configurable.
Homebridge plugin for my Yamaha Receiver optimized for use with the Home App and Alexa
C/C++ and C# library for converting a stream of OPL FM synth chip commands to the OPB music format
Play back the VGM format file with Arduino. (only YM2151)
FPGA-based PCB to control a YM2610 sound synthesis chip.
YTuner is a simple project designed to replace vTuner internet radio service and dedicated to all users of AVRs made by Yamaha, Denon, Onkyo, Marantz and others with built-in vTuner support.
Kurumi - The Wavetable builder as powerful as vampires
Yamaha soundbar integration for Home Assistant.
Yamaha YM7128B Surround Processor emulation library
Unofficial documentation for Yamaha's mixer control protocol
Yamaha Reface CS synthesizer sound generator settings: save and set
A Go library for controlling Yahama Audio/Video receivers with network connections through the Yamaha Control API.
Controlling Yamaha synth chips with Arduino
Music alarm for Yamahas Musiccast system. Aware of holidays and weekends
Pimatic plugin to monitor & control a Yamaha AV Receiver
Music replayer for MSX computers supporting the same song format for OPLL- and OPM-based devices.
Yamaha Musiccast mqtt controller. Control your speakers from your mqtt server.
Expermental code for CSM voice synthesis + CSM data generation
a lot of python stuff for the evy1/nsx-1/pocket miku (in compatibility mode)/vocaloop
Midi controller for MiniDexed