set_professional_spdif
static int set_professional_spdif(struct echoaudio *chip, char prof);
set_professional_spdif(chip, mode);
if (set_professional_spdif(chip, chip->professional_spdif) < 0)
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int set_professional_spdif(struct echoaudio *chip, char prof);
static int set_professional_spdif(struct echoaudio *chip, char prof);