problem sound mixer for mobile phone

[Apollo006]

Hi,

i'm working with a friend on a thesis to graduate this year. We need to build a sound mixer for mobile phones. The problem we encounter is that we need to play several midi's at the same time. Of course this is not possible with the provided media api.  :-/

Is there a way to solve this problem?   We were thinking of creating our own midi parser but are not sure how to do this and if this is the only way to be able to play several midi's in one time.