No way to change video speed maintaining pitch/frequency (speed up without high-pitch)

[Chealer]

Describe the new feature: When changing speed to slow down or accelerate video, allow keeping the audio track's original pitch (sound frequency), so it doesn't sound distorted/manipulated.

Describe the solution you'd like: When changing the speed of a track with audio, prompt the user to determine if OpenShot should attempt to maintain the pitch or not. If so, try doing so using some library. I am ignorant about multimedia and sound manipulation, but I do understand such an effect is advanced and non-trivial, and cannot be implemented perfectly. I see that Audacity has a feature to alter pitch, which should at least mean that some open source code can be reused to implement this.