I always listen to music in stereo, pure and simple, it just sounds muddy and artificial otherwise.
Gaming depends on the game. Games like BF4 or Kingoms of Amalur have headphone modes and you are meant to listen in stereo. Other games don't have a headphone mode and those I select either 6 (5.1) or 8 (7.1) channels and hit the gaming button (dolby headphone with custom profile) though it is probably different on the DX2 (I use the STX).
Gaming depends on the game. Games like BF4 or Kingoms of Amalur have headphone modes and you are meant to listen in stereo. Other games don't have a headphone mode and those I select either 6 (5.1) or 8 (7.1) channels and hit the gaming button (dolby headphone with custom profile) though it is probably different on the DX2 (I use the STX).