GAINCTL_SE
bits = GAINCTL_LE | GAINCTL_HE | GAINCTL_SE | GAINCTL_IS_MASK;
bits &= ~(GAINCTL_LE | GAINCTL_HE | GAINCTL_SE);
bits |= GAINCTL_SE;
mask = GAINCTL_LE | GAINCTL_HE | GAINCTL_SE | GAINCTL_IS_MASK;