raspberry audio output Simulink

Dear,

I use ALSA audio playback speaker output block and sine wave function to generate signal. This signal goes through Matrix Concatenate to mix left and right channel and int16 conversion function.

When implemented into Raspberry board, model runs correctly(analog output) during fews seconds and then there are periodic interruptions on analog output.

Could us help me to find a solution to avoid these discontinuities?

Regards