Watch from Sunday 25 April until end of May

Kronos Quartet, based in San Francisco, has pursued a singular artistic vision, combining a spirit of fearless exploration with a commitment to expanding the range and context of the string quartet. In the process, Kronos has become one of the most celebrated and influential groups of our time. They have just been nominated for a Songlines Music Award.

Their Voices of Hope programme explores struggle and resolution. At the Lincoln Memorial in 1963, Mahalia Jackson’s shout to her close friend Dr Martin Luther King Jr. changed his speech: “Tell them about the Dream! Tell them about the Dream!” It’s said that her plea inspired Dr. King Jr. to stray off-script in his immortal speech. That passage is central to composer Zachary James Watkins' Peace Be Till. The programme also features John Coltrane's Alabama, new Iranian music by Mahsa Vahdat and Sahba Aminikia and ends with Terry Riley's great piece One Earth, One People, One Love from Sun Rings.

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