One of the prices you pay for unlocking the bootloader of your Sony Xperia device is that you lose the DRM keys baked into the native Sony software. That means that special functions that Sony have deemed to be copyright are removed when these DRM keys are lost.
Luckily there is a workaround that will restore the functionality of these DRM keys, including the X-Reality image enhancement engine, the audio noise cancelling feature, and the BIONZ image enhancement engine among others.
It comes courtesy of the XDA forums and involves flashing a small package. Be clear though, this workaround does not restore the actual keys, only the functionality.
Head on over to the XDA forums to check out how to and to download the workaround for your Sony Xperia device now.