Even if you write an application in C for a GNU/Linux distribution you have to use whatever sound Linux-subsystem is deployed, unless you have root permissions

Even if you write an application in C for a GNU/Linux distribution you have to use whatever sound Linux-subsystem is deployed, unless you have root permissions and want to mess concurrently with the audio stack (you don't). The problem is not the fact that they use ALSA and AudioFlinger. ALSA and AudioFlinger just use at this moment too much time. This could be improved by decreasing the period size.