Sound gets corrupted after render/doesn't render

I have a problem with my sound after the render. It gets corrupted and sounds like it's slowed down. I use SeeMusic 5.7 on my Windows 10 System. There are no sound problems in the app, only when I render the videos. I've tried with a different audio codec but it had no effect. Same with the video settings. If I only use the Midi sounds, I works just fine. I've also tried to change the data type from ogg to wav; still no effect.

These were my last render settings (but as I sad, I changed them and tried different combinations):

When I render, it only says "rendering video" but not "rendering sound" (which it does, when I render videos with the Midi sound)

It would be great, if someone could help me, please.

Here is a short 10s clip of what its sounds like: