In episode four of Vocal Chords, presenter and singer Iarla O Lionaird explores the power and spirit of the combined voice from church choirs to street protest, from prison camps to the factory floor.

Iarla takes the journey from the unique sound of Robert Hollingworths solo voice ensemble, I Fagiolini, and grammy award winning folk choir Le Mystere des Voix Bulgares to the deep bass tones of Welsh mining mens choirs and the Singing Revolution of the Baltic States. South African singers talk of toyi toyi protests when the power of the marching crowds singing carried them for miles. Vocal Chords is the intellectual property of Athena Media Ltd and no production use can be made of the podcasts without the direct consent of the producers. www.vocalchords.ie