
I don't know if the developer will respond to this, but I've seen the writing on the APO forum and Github.
It feels different from the 90 degree phase shift I thought, and the frequency response actually changes a lot. (Sort of bass boost, reduced pitch)
Did you mean it?
And there is a delay of 100ms in the Wav file itself.
For example, the LI/RI virtual channel of the Dolby Prologic document has a delay of 13ms
So the delay of 13ms + 100ms is all intended as well?