Habbo Music Notation (HMN)

Available Specifications:

• HMN v1.0
  • Specification Status: Draft
  • Date: 2025-04-17
  • Available in: English
  • Summary: The text-based notation designed to represent music compositions in the Traxmachine system of Habbo Hotel. It encodes structured data for music layers, sample references, and durations as a single-line string.
• HMN v1.1
  • Specification Status: Exploratory
  • Date: 2025-04-27
  • Available in: English
  • Main changes: although a Trax Editor for this version not been released to the player-base, songs now can have up to 8 tracks, there are more sound sets (sample ids not sequential), and its possible to cut 2-seconds segments of the end in any sample in the timeline.

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