John Bull was a seventeenth centurary English composer whose chromatic piece, based on the cantus firmus spelt out in its title, contains 18 of the 19 enharmonic spellings of the notes of the 19TET scale.
The same piece as in the previous track, but this time rendered as if the notation referred to the notes of the 19TET scale.
The same piece as in the first track, but this time rendered in 19-tone Extended Mean Tone temperament. The Mean Tone pitch definition is extended to create alternative tunings for notes which today would be considered enharmonically equivalent.