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This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including jzz-gui-player. Try it out:
// runkit-midi internally uses jzz-gui-player
const rkmidi = require('runkit-midi');
const download = require('download');
const midi = await download('https://github.com/jazz-soft/JZZ-gui-Karaoke/raw/master/mary.mid');
rkmidi(midi);
// click the [▶run] button... ↓
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