... browser. You can record up to 30 seconds, import WAV/MP3/M4A, and export the result as PNG, PDF, MIDI, or WAV. No account needed, and the audio stays on your device. It's definitely not perfect. I'm using basicpitch, spectrum, and volume analysis rather than AI, so it works best with a clear melody played by one instrument or sung on its own. Add chords, drums, or a busy backing track and the results can get pretty messy ...