It also depends on the motherboard maker, sure the audio chipset might support it. But if the mobo maker does not pay for the rights to use it on their mobo. Then you wouldn't have it the option of it on the model of the mobo. Even if the chip-set supports it.
one example is my audio chipset model supports it but gigabyte didn't pay for the fees to have DD live or DTS connect available to my motherboard.