Function for_percussion_key 

pub fn for_percussion_key(key: u8) -> Result<Instrument>

The instrument a key of the General MIDI percussion map plays, played the way that key says: music21’s midi.percussion.PercussionMapper.midiPitchToInstrument.

A key is 0 to 127 and the map runs from 35 to 81; a key outside it, or one of the eleven inside it music21 has no instrument for, is an error, as it raises there. Where the instrument is played more than one way the modifier is the one that key plays, so key 36 is a bass drum played "1" and key 35 the same drum played "acoustic".

use music21_rs::instrument::for_percussion_key;

let drum = for_percussion_key(36)?;
assert_eq!(drum.kind(), "BassDrum");
assert_eq!(drum.modifier(), Some("1"));
assert_eq!(drum.percussion_pitch(), Some(36));
assert!(for_percussion_key(69).is_err());

Errors

A key the map does not name an instrument for.