Time stretch sound quality in unity

Use pitch shifter pugin and master pitch to achieve time stetch effect,like:Time stretch hack for FMOD - YouTube

I set 3 lable of speeds, 1x, 2x, 3x

When accelerating, the sound quality of the sound will deteriorate when the playback is accelerated in Unity, and the diffusion of the sound image will diverge, like a spread effect .but this is not a must every time. FMOD Time Stretch in unity - YouTube

A lot of this can be down to the sample rate of the audio file you’re using.

A higher sample rate on an audio file allows you to change pitch with fewer artefacts at the cost of requiring more resources. Ensure your raw audio file is rendered at a high sample rate and match that setting the in the asset browser’s Advance Encoding Settings before building to a bank.