resurrecting this thread because I am having the same issue.
Is there any clear explanation / documentation as to what UE4 is doing on import? I am using the new audio engine with 48khz source wavs and whenever I import sounds my low frequencies turn to junk and disappear. I’m talking 200Hz-ish and below. What is going on? I’m not using any 3D settings / air absorption etc etc, just trying to play a 2D sound. Can you tell me exactly what compression is being applied? It also seems strange to me that the audible difference between compression quality 1 and 100 is really not that big.
I’m currently using UE4.20.3
Any help / info appreciated @dan.reynolds .