Customer is using OD 6 with AAEP 6.

Customer wants to change the speed of the WAV files used in their OD application via some feature on AAEP or OD.

Though it can be done by changing the wav files speed but customer does not want to struggle with changing all of the wav files and then uploading them again.
They are asking if there is a feature on OD or AAEP to make this request easily? As I know, there is no any feature to make this, but wanted to confirm.
They are using EP&OD 6 version

Correct there is no such feature.