Tonus Peregrinus is a vocal ensemble specialising in early music and contemporary sacred music,[1] especially that of founder and director, Antony Pitts. TP, as they are also known, has recorded a number of CDs for Naxos,[2] their first winning the Cannes Classical Award (Arvo Pärt's Passio), and two albums of Antony Pitts' music for Hyperion Records[3] – Seven Letters and Alpha and Omega.
The ensemble sang at the memorial for Alexander Litvinenko.[4]