You can also choose to mix'n'match:
1) original effects w/ 2 channel audio; or
2) original effects w/ 5.1 audio; or
3) new effects w/ 2 channel audio; or
4) new effects w/ 5.1 audio.
And, it's fairly easy (depending upon where the Angle button is located on your player or remote), to switch back and forth to compare the original vs. new effects.
1) original effects w/ 2 channel audio; or
2) original effects w/ 5.1 audio; or
3) new effects w/ 2 channel audio; or
4) new effects w/ 5.1 audio.
And, it's fairly easy (depending upon where the Angle button is located on your player or remote), to switch back and forth to compare the original vs. new effects.