int mixer_control(int *left, int *right, int set);
const char *mixer_default_device(int api);
const char *mixer_default_channel(int api);
extern const struct mixer mixer_oss;
int mixer_control(int *left, int *right, int set);
const char *mixer_default_device(int api);
const char *mixer_default_channel(int api);
extern const struct mixer mixer_oss;