The Vale of Glamorgan Festival, the mission of which is to celebrate and perform music by living composers, is in its 52nd year, under the helm of its founder and artistic director, composer John Metcalf. This year, many of the festival’s programs may be found online here.
Included in the program is a preview of a “Towards Silence,” a new string quartet by John Metcalf, which you can hear at 1:18 here:
You can hear John Metcalf talk about his piece at about 44 minutes in. The complete listing of pieces performed in the program Prayers of Method & Fruits of Silence, including works by David Roche, Pēteris Vasks, Gutow Puw, and Sarah Jenkins, may be found here and here.