Barbara Hepworth interview, 1968. Here, Hepworth talks about her work, her breathing and her hands. In her garden and studio you can hear the church clock chiming, gulls crying and the Atlantic Ocean at high tide. The soundtrack and the sculptures have survived the artist, it's a perfectly formed legacy.

An account of the Fugs levitating the Pentagon in 1967 Hepworth made her first pierced-form sculpture in 1931. The Fugs decided to pierce the Pentagon in 1967. They wanted to release the accumulated demons there that were prolonging America's war with Vietnam. Hepworth used her mallet and chisel, the Fugs used guitars, daisies and chants – needs must when the devil drives.

Your Actions Are My Dreams The day before making a new work, I become very inarticulate and have the vocabulary of a three year old. Hence in this short Tate film, I manage to say, "I just need to sleep".

Ustaad Ranbir Singh playing Rāg Tilang on the dilruba Ustaad Ranbir Singh is my dilruba teacher at the Raj Academy of Asian Music. The name, dilruba, means "heart stealer" – the bowed sound of the twenty-five strings is said to be so sweet that it steals your heart away. Ustaad Ranbir Singh plays like an angel and I follow him as a loyal and ineffective thief.

Professor Surinder Singh of the Raj Academy of Asian Music One of the earliest lessons that Professor Surinder Singh taught me was how to "decompose my mind to compose my life". At the time, my mind very definitely did not want to be decomposed, it still doesn't, so I have to begin my Naad yoga practice at 5am each day, when my mind is still asleep. That way the resistance to change is minimal and the piercing with the naad, the sacred sound current, is effortless. Composure then has a fighting chance for the rest of the day.

Stuart McCallum Stuart McCallum's use of strings has all of Hepworth's paradoxical curiosity and certainty, he's an adept sonic heart stealer too. Stuart and I are working on a series of recordings using voice and various stringed instruments – the dilruba, the harp, the guitar and more. We never quite know where we're going until we get there. Here Stuart plays La Cigale and I play with flora.