Mark Ainley on EMI's vintage recordings

Eighty years ago a series of recordings were made of West African musicians. The Zonophone record company released them as gramophone discs between 1927 and 1930. It was a commercial decision by Zonophone to dominate the West African market. But the musicians themselves were recorded in London. Now they're being released on CD allowing us to hear them for the first time. Mark Ainley from Honest Jon's records spent 18 months trawling through EMI's vast archive of vintage recordings before putting the CD together. Guardian Weekly's Jon Dennis caught up with him in the basement of his west London record shop.