MIXER_AUDIO_CHANNEL
MIXER_AUDIO_CHANNEL Channel; // Which channel to service
echo_channel_set_mix(void *card, MIXER_AUDIO_CHANNEL channel, int32 type, float *values) {
MIXER_AUDIO_CHANNEL channel, bool nominal) {
MIXER_AUDIO_CHANNEL channel;
echo_channel_get_mix(void *card, MIXER_AUDIO_CHANNEL channel, int32 type, float *values) {
void (*get) (void *card, MIXER_AUDIO_CHANNEL, int32 type, float *values);
void (*set) (void *card, MIXER_AUDIO_CHANNEL, int32 type, float *values);
MIXER_AUDIO_CHANNEL channel;