Vortex Tracker II is a Win32 tracker used to make music for the AY-3/YM series of sound chips. This is the sound chip used in the ZX Spectrum and Atari ST home computers, among other things. It can export a wide variety of formats for playback on real hardware. Vortex Tracker II can also synchronize two open modules to emulate dual AY playback.
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Tutorial by BotB's own ant1!