add: ac97_reg_cached_write(dev, AC97_ALC650_SURR_VOLUME, 0x0808); ac97_reg_cached_write(dev, AC97_ALC650_CEN_LFE_VOLUME, 0x0808);
context: void alc650_init(ac97_dev *dev){	LOG(("alc650_init\n"));	/* Surround, LFE and Center downmixed into Line-out,	 * Surround-out is duplicated Line-out.	 */	ac97_reg_cached_write(dev, AC97_ALC650_MULTI_CHAN_CTRL, 0x0007);}