There's an interesting interview here by Richard Bloor, chatting to Jezar Wakefield. Yep, that 'jezar', tech-guru from the days of Psion and EPOC/32 (Symbian OS's beginnings). They talk about Jezar's current role in the field of audio in Symbian OS, about options for developers, about how a modern smartphone might have to manager up to 4 or 5 separate audio streams or events at the same time, and about OpenMAX, designed to make things even easier for developers.
Read on in the full article.