GigaMIDI: 2.1 Million MIDI Files with Expressive Loop Annotations

Metacreation released this collection of 2.1 million unique MIDI files in 2026 for symbolic music research. The dataset features detailed annotations for expressive loop detection, incorporating performance nuances such as microtiming and dynamics.

Use Cases

• Developing loop detection algorithms using the provided expressive performance annotations
• Analyzing microtiming patterns across 2.1 million symbolic music files
• Training generative models to produce dynamic MIDI sequences based on performance nuance data

Strengths

• Contains 2.1 million unique MIDI files
• Includes specific annotations for expressive performance nuances
• Available in Parquet format for high-performance data processing

Limitations

• Restricted to non-commercial use by the CC BY-NC 4.0 license
• Symbolic MIDI format lacks the timbral information found in raw audio recordings

Provenance

Source

Metacreation

Collection Method

Annotated symbolic music collection using a novel expressive loop detection method

Freshness

Last updated February 2026.