Due to the use of high clefs a transposition of this piece is available here.

Score: 01-byrd--mass_for_four_voices-kyrie---0-score.pdf

MIDI files:

• 01-byrd--mass_for_four_voices-kyrie---0-score.midi

Num	Name	Cleffing;
1	cantus	part in treble clef
2	altus	part in treble clef
3	tenor	part in alto clef
3	tenor	part in octavated treble clef
4	bassus	part in bass clef

• Aggregated parts for recorder and winds (no alto clefs)
• All aggregated parts (may include both alto and octavated treble clefs)
• Aggregated parts for viols (alto clefs, no octavated treble clefs)

CPDL link: https://test.cpdl.org/wiki/index.php/Mass_for_Four_Voices_(William_Byrd)