Pitch Shifting Sounds

I recently started adding sounds to my game and there are a few sounds that need to play very often. For instance, footsteps and card flips. I was able to use the random exit to pick from 4 footstep sounds, but this can still double up if there are a few characters on the screen and they happen to hit the same sound. The card flip sound is much worse because there can be 40 cards on the screen at once and it just sounds like a really loud buggy noise when they are moving.

The general recommended way to handle this is slightly randomizing the pitch and duration per sound but there isn't an option for this in Rive. I was hoping to keep all the sound in Rive but I may have to handle this in my own engine.