Harmony in music can evoke every range of emotions. It can be either sweet or bitter, major or minor. At one end of the scale, Thomas Morley writes about the delights of young lovers, while the American soul group The Tymes sing about the same subject 400 years later, in bright, sunny harmonies. Heinrich Isaac composes a piece of slow-burning romantic passion disguised as a sacred motet, while John Tavener (500 years later) takes the opposite approach and explores the mystical significance of human love. And, at the other end of the scale, Guillaume de Machaut writes about the torments of love unrequited, and Imogen Heap (over 600 years later) writes about the aftermath of a breakup, with searing dissonances.

4 in a Bar will take you on a journey through all these and much more, in four-part a cappella harmony.