buffer_size = snd_pcm_hw_params_get_buffer_size(params);/* set period time */err =snd_pcm_hw_params_set_period_time_near(handle, params, period_time, &dir);if(err <0) {printf("Unable to set period time %i for playback: %s\n", period_time, snd_strerror(err));returnerr; }...