SB_RATE_LOCK_PLAYBACK
#define SB_RATE_LOCK (SB_RATE_LOCK_PLAYBACK | SB_RATE_LOCK_CAPTURE)
chip->mode |= SB_RATE_LOCK_PLAYBACK;
chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
if (chip->mode & SB_RATE_LOCK_PLAYBACK)
chip->mode |= SB_RATE_LOCK_PLAYBACK;
chip->mode &= ~SB_RATE_LOCK_PLAYBACK;