• utz
  • utz
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  • Registered: 2015-06-28
  • Posts: 1,005

Topic: List of Atari GTIA engines and converters

Below you can find a list of all available 1-bit routines for Atari 8-bit computers and their GTIA chip. There are currently no native engines for this platform. All the available ones were originally developed for the ZX Spectrum beeper, and were ported to Atari by XXL. For tutorials on usage, refer to the ZX beeper list.


LSengine by Lyndon Sharp
- 2 tone channels + non-interrupting sample drums
- custom synthesis
XM converter

Octode by Shiru
- 8 tone channels + interrupting click drums
- pulse-frequency modulated (pin pulse) sound
XM converter

Qchan by Shiru
- 4 tone channels + interrupting click drums
- pulse-frequency modulated (pin pulse) sound, volume control, envelopes
XM converter

Tritone by Shiru
- 3 tone channels + interrupting click drums
- pulse-interleaving (square wave) sound, variable pulse-width
XM converter


XXL has also ported several other engines including Music Studio, Octode XL, Phaser1, ZX-7, and ZX-10, but there are currently no converters available for these.

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utz's Website

  • From: London
  • Registered: 2015-06-29
  • Posts: 66

Re: List of Atari GTIA engines and converters

I should have written this a long time ago, but I was not around for a while.

XXL, congratulations on great conversions of the sound engines. I am especially impressed with your port of the Tritone - the row transition noise is all but eliminated. Amazing work! We've got to catch up on ZX Spectrum...

introspec's Website