The set of pitch relationships that establishes a single pitch class as a tonal centre for a musical work or expression. May be used to differentiate a musical work from another with the same title.
1st Indicator
Key type.
Relationship to original unknown. The relationship of the specified key to the original key in which the musical composition was written.
0
Original key.
1
Transposed key. A different key from that of the original work.
2nd Indicator
Undefined. The 2nd indicator position is undefined and contains a blank ( ).
Undefined
Subfields
‡a Key
The pitch name and the mode (e.g., major or minor).