Missa 'Sancta Maria' (Anon) from the first Leiden Choirbook (Codex A) Egidius College, Peter de Groot conductor. Leiden Pieterskerk 2010. Video: Daniël Brüggen.

Peter de Groot & Egidius College rehearsing (sing through) O Maria singularis by Johannes Lupi (c1506-1539) from the 3d Leiden Choirbook.
Amsterdam, MuzyQ, 2012

Recording session january 2014 Church Mijnsheerenland: Salve Regina by Joannes Flamingus by Egidius College.

IPhone recording of the rehearsal before the midnight concert with Nederlands Kamerkoor Koorbiënnale 3d of July 2015 Haarlem St. Bavon;
The beginning of Robert White's 5 part Lamentations