Uhm, i dont know if you didnt understand me or i dont, because your talking about a music production software 
since my englisch isnt the best.
What i wanted to archieve is something like “running = true” > set pitch / add pitch to “play 2d sound” or in other words the music that is currently playing, or what ever, but without starting the music from beginning :S
How to get the pitch higher isnt the problem, just how to get it modified inside a blueprint via variable or what ever.