Ca 50% of recordings are out of polarity, either in the recording or studio editing process. Adding a switch to change playback polarity leads to significant improvements in sound quality and is therefor highly desirable
Indeed the player software does have this option but the difficulty is how to operate this. It's essentially a trial and error operation to check which polarity is right for each track as AFAIK there is no automated way to determine. It also implies restarting the track that's being played from the beginning. How would you see this feature being used?
Nuno, I used it as an in-play toggle switch in puremusic. There is obviously no predetermined way before the track starts, but toggling in-play makes the right polarity immediately audible