A2M (Audio to MIDI) is an open-source Windows application for converting piano recordings into editable MIDI files. It estimates notes, timing, velocity, sustain, and soft-pedal events, with the best results obtained from clean solo piano recordings.

Choose an audio file, select CPU or a CUDA/DirectML mode, and click Convert to MIDI. The generated file is saved to Downloads/A2M by default, or to a custom folder selected in Settings.

Audio analysis is performed locally. Source recordings are not uploaded, and no account is required. Network access may be used for requested downloads and update checks when enabled.

CPU processing is available by default. Optional GPU acceleration can reduce processing time on compatible hardware.

Website: https://www.justagwas.com/projects/a2m
GitHub: https://github.com/Justagwas/A2M
Docs: https://github.com/Justagwas/A2M/wiki

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Features

  • Audio recording to MIDI conversion
  • Local-only audio processing
  • One-click conversion workflow
  • Automatic output to Downloads/A2M
  • Optional CUDA and DirectML GPU acceleration
  • Common audio format support
  • Open-source software

Project Samples

Project Activity

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License

GNU General Public License version 3.0 (GPLv3)

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Additional Project Details

Operating Systems

Windows

Languages

English

Intended Audience

End Users/Desktop

User Interface

Project is a user interface (UI) system

Programming Language

Python

Related Categories

Python Audio Conversion Software, Python MIDI Software

Registered

2026-01-30