Bullet: MOD / XM / S3M / IT (trackers) Bullet: SID tunes (C64) Bullet: YM (Atari ST) Bullet: Chip + sample hybrids
Bullet: Track with the target machine in mind (voices, CPU, memory) Bullet: Keep a clean loop or a strong structure for a demo sync Bullet: If you share a module, include the tracker version and license intent