This is a transposition from the printed clefs due to high clefs. The original cleffing is available here.
Score: 02-byrd--mass_for_four_voices-gloria-transposed--0-score.pdf
MIDI files:
| Num | Name | Cleffing; |
| 1 | cantus | part in treble clef |
| 2 | altus | part in alto clef |
| 2 | altus | part in octavated treble clef |
| 3 | tenor | part in alto clef |
| 3 | tenor | part in bass clef |
| 3 | tenor | part in octavated treble clef |
| 4 | bassus | part in bass clef |