Convert MID to AIFF — Free Online Converter

MID (Standard MIDI File) is a compact music notation format that encodes performance instructions — notes, timing, dynamics, instrument assignments — rather than audio data. Developed by the MIDI Manufacturers Association in 1983, MIDI files are typically 10-100 KB because they describe musical events, not sound waves. A synthesizer or sound library must interpret these instructions to produce audible music.

AIFF (Audio Interchange File Format) is Apple's uncompressed audio standard, storing raw PCM data at full resolution. Converting MID to AIFF renders the MIDI performance through a software synthesizer and captures the resulting audio as uncompressed PCM in the AIFF container. This produces the highest-fidelity capture of the synthesized output, preserving every detail of the rendering.

MIDI files sound different on every device because each synthesizer interprets the instructions differently. Converting to AIFF creates a permanent, uncompressed recording of one specific rendering. This is ideal for archival, professional editing, and mastering workflows where lossy compression is unacceptable.

AIFF is the standard uncompressed format in Apple's professional audio ecosystem — Logic Pro, GarageBand, and Final Cut Pro all natively support it. Rendering MIDI to AIFF provides a perfect source for further processing, mixing, or mastering without any compression artifacts.