Houston Tracker is an editor/sequencer which allows you to compose and play polyphonic 1-bit music on your TI graphic calculator. At the moment, it is available for TI82, TI83/82STATS, and TI83+/84+/SE. Ports to other Z80-based TI calculators will follow soon.

- Polyphonic 1-bit sound, play up to 4 tones simultaneously      - 3 different sound routines (2x PFM, 1x Pulse Interleaving) - Stereo sound - Song length up to 2000 steps (1600 on TI83+/84+) - Multispeed tunes - Simple "Live" effects - Compact editor + player (~ 4.5 KB) Sound examples:  Engine 1   Engines 2/3

The source code is now publicly available at github.

Version 0.3 -

Added "Light" versions, which take up less memory (but have a lower song length limit). Added a new drum sound. Added channel mute/deactivate for RowPlay and copying. Added support for saving multiple tracks. Various optimizations, about 300 bytes shaved from core routine.

Version 0.22 -

Added TI83+/84+ port. Fixed a minor bug in the TI83 version which prevented drum 2 from playing.

Version 0.21 -

Added TI83 port. Fixed a critical bug which prevented the TIM-FX routine from exiting.

Version 0.2 -

Added Copy/Paste and a number of other features that will make editing less tedious. Added rudimentary "live" features: Hold (pause) and Loop Current Row. Added simple Save/Load functionality. Added 2 new sound routines - TIM-FX (2 PFM channels + various fx), and Mark-2 (3 square wave channels) Added an option to change the tempo mid-song. Fixed a critical bug which caused the calc to freeze when trying to play row #000 with end marker set.

Version 0.1 -

First public beta release.

Many thanks go to:

SorgenFreu for all his contributions, especially for manually tuning the pitch table
c'd for help with TI83+ version
Shiru for his concept of a direct-to-memory editor
Hideaki Omuro for CrAsh
The Omnimaga and cm.org communities for ideas and cheers