MOD Format

MOD (module) files changed computer music forever by combining samples with pattern-based sequencing in a compact format.

Structure

A MOD file contains:

• 4-31 instrument samples (8-bit PCM)
• Pattern data (notes, effects, volumes)
• Sequence list defining playback order
• Metadata (title, sample names)

The Tracker Revolution

MOD files were created with tracker software:

• Visual pattern editor
• Hexadecimal effect commands
• Sample manipulation tools
• Real-time playback engine

Platform Support

Originally Amiga-only, MODs spread everywhere:

• ProTracker (Amiga standard)
• FastTracker (PC extended format)
• ScreamTracker (PC alternative)
• Modern players on all platforms

Cultural Impact

MODs democratized music creation:

• No expensive equipment needed
• Learn by examining others’ work
• Tiny file sizes perfect for BBSes
• Foundation of demoscene music culture