In the context of the Roblox game The Wild West (TWW) , MIDI files are used to play custom music on in-game instruments. The game reads the MIDI data—which acts like a digital "sheet music" set—to trigger specific notes on instruments like the trumpet or accordion using the game's own sound fonts. How to Use MIDI Files in TWW
: Remember that the same MIDI will sound different depending on whether you play it on an Accordion, a Piano, or a Steam Organ. Band Syncing tww midi files