I have the same problem with Files I recorded from Video and saved in MP3.
When I open them in VCL Player, MP3 Player or iTunes everything is good, but when I open it with any NCH Software (Wavepad, VideoPad, Switch) the speed is extremely high as if it were compressed to 1 min 20 length.
I want to edit those files so I cannot let it be with being able to hear those files correctly in other players.
Hardware info:
Windows 10 Home, 64bit
Intel Core i7-4820K CPU 3,70 GHz each
64 GB RAM
AMD Radeon R9 200 Series Graphic Card
running these Programms from Mushkin Scorpion SSD 12 GB
Keyboard: Microsoft SideWinder X4
Mouse: Asus STRIX Claw
any info missing? just ask!