A problem with a lot of custom music (including from the Community Music Pack) has arisen as a result of updates to the sound system in NWN:EE. Details on the problem can be found on this and linked threads on the Beamdog forums. Basically, audio artifacts are appearing in many of the tracks in the CMP, and in other music compilations as well.
I’ve tested a straightforward process (described here) of fixing the problem with a simple re-import and re-export using mp3tobmu and Audacity. If this isn’t fixed in EE then this will have to be done for each affected file to prepare an EE compatible release of it.
Since we now seem to have a March 27th release date for NWN:EE, my sense is that there isn’t time to wait for mod-breaking issues like this to be resolved by Beamdog. I’ve already converted some of the tracks for Sanctum of the Archmage and will be doing the rest shortly. I’ll also PM Tiberius Morghun to offer the re-made tracks from the CMP for the update that looks likely to be necessary.