A piano-to-MIDI transcription can contain extra or missing notes when background instruments, heavy reverb, noise or a quiet piano part make pitches difficult to distinguish. Transkun is designed for piano, so use a clean solo piano recording in the piano-to-MIDI transcriber. Compare the MIDI playback with the original and correct note errors in your DAW. If the recording contains several instruments, use MuScriptor for multi-instrument transcription or isolate a piano stem before running Transkun. Stem separation can help, but remaining bleed and separation artifacts can still affect the notes.