Ancient Text Messages of the YorÃ¹bá BÃ tá Drum Cracking the Code. Amanda Villepastour. 2010. Farnham: Ashgate, SOAS Musicology Series. 173 pp. photos, transcriptions, CD. ISBN 978-0-7546-6753-7 hb, ISBN 0754667537 pb. (2010). African Music : Journal of the International Library of African Music, 8(4), 124-125. https://doi.org/10.21504/amj.v8i4.1872