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Last update: April 02, 2026

maxYMiser

About

What is MaxYMiser?

MaxYMiser is a modern music tracker and chiptune composition tool designed for the Atari ST family. It was created by British programmer and musician Gareth "gwEm" Morris and was developed to combine features from several existing Atari trackers into a powerful YM-based music editor.

MaxYMiser is built around the Yamaha YM2149 sound chip found in Atari ST computers. It provides tracker-style pattern and song editing, allowing musicians to program notes, instruments, effects and sequences directly for the ST's three YM sound channels. Its interface takes inspiration from FastTracker II, while its sound engine uses software techniques to push the YM2149 far beyond its original capabilities.

One of MaxYMiser's strengths is its ability to create sophisticated chiptune sounds using custom waveforms, software-generated effects, FM techniques and digitized samples. On Atari STe and compatible machines, DMA audio can also be used, allowing sample playback alongside the YM2149 channels.

The tracker also includes MIDI support, making it possible to integrate MIDI equipment into the composition workflow. Songs can be saved in SNDH, a format widely used for Atari ST music and particularly suited to preserving ST-specific music routines and playback.

MaxYMiser became an important tool within the modern Atari ST and demoscene music community. It has been used for demos, games and dedicated chiptune productions, and remains one of the most advanced ways of composing music specifically for the Atari ST's YM2149 sound hardware.

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