Mukund,
I know PLII has adjustments (C,W,P), but does NEO:6?
The code for Neo:6 has been revised about 4 times. In the very latest revision just showing up in newer receivers, the Neo:6 Music mode has one adjustable parameter: Center Image (just like PLII's Center Width parameter, but in 10 steps from 0.0 to 1.0, with the default being at 0.3).
The other change DTS made to the music mode is that the front Left & Right channels are now no longer processed. They are passed directly to the front speakers, with centre fill and mild surround added.
Unfortunately, this doesn't apply to older processors like ours.
Best,
Sanjay