Musicians can be poets, writers sometimes write lyrics or librettos so it makes sense that literary festivals include musical performances in their program.
For its 25th anniversary, Hay Festival 2012 in Wales (May 31-June 10) offers a myriad sounds from planet earth under The Sound Castle umbrella.
From June 1 to June 9 concerts include Frente Cumbiero, a cumbia band from Bogoto led by Mario Galeano and Speech Debelle whose first album 'Speech Therapy' described as 'soulful and raw' (i have not heard it yet) has been earning rave reviews.
Let there be music in the evenings after days of books!