I'm fairly new to crossfading albeit having a fairly good understanding of the mathematics and physical units.
What I can't wrap my head around is as to whether there is a difference between crossfading between files and between physical speakers.
What I want to achieve is a constant loudness/volume level across the fade, leading to the questions:
in order generate a 3rd mono WAV file C from two other mono WAV files A and B of equal loudness/volume, how do I guarantee that C.wav has the same loudness/volume as A.wav and B.wav individually? Do I choose equal power fading or equal gain fading?
what is the method of choice for crossfading between two speakers, say the left and right one of a headphone, if I want the sound to "move" between the speakers with equal total loudness, do I have to use equal power fading or equal gain fading?