A musical instrument, which comprises chord triggers that are each mapped to a specific chord. The specific chord is output, for example via MIDI data, when the chord trigger is activated by a user. The instrument includes means for highlighting, for example via illumination, vibration or heat, certain chord triggers to help the user while playing. The chord triggers which are highlighted have a mapped chord that has a certain similarity with a note repertoire which is previously set. This note repertoire could be a note scale like F-major or G-sharp-Spanish. If the chord of a chord trigger and a previously set note repertoire do match on enough common pitch classes that chord trigger gets highlighted, to show the relationship to the user. In particular, a chord trigger is highlighted if it fulfils a mathematical inequality, which compares a threshold with the cardinality of the intersection of the pitch classes of the mapped specific chord and the pitch classes of the note repertoire.
Musical instrument, which comprises chord triggers, that are simultaneously triggerable and that are each mapped to a specific chord,