MIDI Player & Converter for Mac

What this application does

MIDI Player & Converter (developed by Wenzhi Lao) is a desktop tool designed to help users study and enjoy music. It can export MIDI files with updated note data, render piano sounds that closely resemble a live instrument, and display embedded lyrics when they exist in the MIDI file. You can also change playback speed to slow down or speed up pieces for practice or analysis.

Saving and printing sheet music

The program can generate sheet music as PDF files so you can print scores and follow along while listening. This makes it easier to learn parts by sight and ear simultaneously — ideal for practice sessions or classroom use.

Supported audio output formats

• OGG
• WMA
• M4A
• MP2
• AMR
• FLAC
• AC3
• AU
• AIFF
• Apple Lossless
• AAC
• MP3
• WAV

MIDI Converter can render MIDI into any of the above formats, giving you flexibility for playback on different devices or for further editing.

Editing capabilities and score customization

• Change the color of notes for visual clarity
• Display plain note letters on the staff
• Loop selected measures for focused practice
• Adjust measure lengths and bar structure
• Merge or combine notes where needed
• Transpose passages to different keys
• Move or shift notes in time or pitch
• Modify time signatures and tempo maps
• Choose alternative instruments for tracks
• Mute or show individual tracks independently

These tools let you reshape arrangements, isolate parts, and tailor the score to your learning goals.

Playback controls

• Adjust the overall volume
• Toggle looping on and off
• Skip forward through the track
• Jump to the next track or section
• Stop playback instantly
• Move back to the previous segment
• Rewind to earlier positions

The player includes familiar transport controls plus looping and volume adjustment to support practice and performance preparation.

Learning benefits and use cases

Because it integrates visual scores, lyric display, adjustable tempo, and realistic piano timbre, the app is useful for teachers, students, and self-taught musicians. You can slow difficult passages, print parts for practice, or export audio in a format suitable for mobile devices and practice sessions.

Alternative option to consider

If you want a free alternative focused on music learning and MIDI manipulation, try MidiPipe — it’s a lightweight, no-cost option that many users recommend for experimenting with MIDI data and real-time transformations.