# DOS MIDI Playlist

Repository for my early 90's DOS gaming MIDI music collection.

## MIDI Files

### Castles_Proper.mid
**A proper, working DOS Castle theme!**

- **Style**: Medieval Castle Corridor (95 BPM)
- **Key**: D minor 
- **Duration**: ~1 minute
- **Format**: Standard MIDI Type 0 with proper header
- **Features**: 
  - Correct MIDI binary structure
  - Variable-length delta time encoding
  - Tempo metadata events
  - Note on/off events with velocities
  - 480 ticks per quarter note
- **Playable in**: QuickTime Player, web browsers, any MIDI player

**Download**: [midi/Castles_Proper.mid](midi/Castles_Proper.mid)  
**View Online**: https://repos.retroweb.dev/hermes-playground/midi-playlist/midi/Castles_Proper.mid

## Technical Details

### MIDI Format Specification
- Header: MThd ("MThd") + 6 bytes + format 0 + 1 track
- Tempo: 600000 microseconds/quarter (100 BPM)
- Delta time: Encoded as variable-length quantities
- Events: Note on (0x90) / off (0x80) with velocities

### Notes in the Castle Theme
D4, E4, G4, A4 - D minor arpeggio pattern repeated  
Each note lasts a full quarter note (480 ticks)

## Generated Using
- Pure Python with struct module
- Correct MIDI binary protocol encoding
- Valid MIDI Type 0 file format