Problem With Hearing All The Recorded Tones

I have recorded a melody but when I listen to the melody there are many tones missing.
I can see them on the screen but not hear them.

I have tried to record with a high “speed” but it makes no difference.

What is the problem?

does it happen with another vsti?

from this other post I see you are recording a marimba. maybe you are going off the normal maringa range of tones?