MIDI File Piano Roll and Inspector

MIDI File Piano Roll and Inspector is a desktop Standard MIDI File (.mid, .midi) binary
analyzer, interactive 2D piano roll editor, General MIDI patch inspector, and polyphonic
PCM WAV audio preview synthesizer for Linux.
An independent Linux alternative inspired by desktop digital audio workstation MIDI
editors, it parses Format 0 and Format 1 MThd/MTrk binary streams directly in pure Python
without external synth dependencies.

Key Features:
- Binary MThd & MTrk Event Inspector: Decodes variable-length delta-times, running status,
Note On/Off pairs, Control Changes, Pitch Bend, System Exclusive packets, tempo maps
(FF 51), musical meter metadata (FF 58), key metadata (FF 59), and track text labels
with byte-accurate hexadecimal inspection.
- Interactive 2D Piano Roll & Velocity Lane: Displays pitched and percussion note spans
across bars and beats with velocity-shaded color modes, keyboard pitch ruler, tempo and
meter markers, interactive click-to-add and right-click-to-remove note editing, and
live playhead tracking.
- Musical Transformations & General MIDI Mapping: Supports lossless semitone transposition
with automatic Channel 10 drum protection, tempo multiplier rescaling, note grid
quantization, and all 128 General MIDI Level 1 instrument program assignments.
- Polyphonic PCM WAV Preview & Lossless Export: Synthesizes multi-track stereo 16-bit PCM
WAV audio previews with waveform level telemetry, plays previews via system audio, and
exports round-trip lossless .mid files alongside structured CSV and JSON event reports.

Disclaimer: This project is an independent open-source tool and is not affiliated with, sponsored by, or endorsed by Steinberg Media Technologies GmbH.