Let me explain a bit more, what I am looking for and why. May be, someone has a good solution.
I have a song as list of MIDI-data. With this I create and play a wave-file with my own piano-wave-samples. This works, but it takes time, to create a wave-file. On iOS much more than on Android, about one minute creating for 8 minutes music.
So I wanted do do this:
1. -Create the first 4 seconds of the music
2. -Start playing the file
3. -create the rest while already playing
But the Player stops after the 4 seconds. So I think, it loads already the music into an intern buffer and the appended data has no effect.