For the few having issues with garbled/clipped/distorted audio over your center channel (mainly vocals) when using the optical output on the a2, I just want to share my findings. Just because your reciever/processor says it will handle dts, doesn't mean it will accept the 1.5 mpbs dts bitstream coming from the A2. I was able to email the HK engineer that designed my 7 year old processor and he said my unit had an older generation of the dts chipset (generation 3) that isn't capable of handling a 1.5mpbs bitstream. He recommended a more current processor having at least a gen 6 dts chipset.
If you are having the issue and you have an older receiver/processor, that could be your problem also....
If you are having the issue and you have an older receiver/processor, that could be your problem also....