allows to make the tempo or play speed shorter or longer, but keep the pitch the same throughout.
How to use
-Left-click-and-drag on the select a portion of the audio
-Click Effects menu and select Time Stretch
Tip: For example for the voice audio file the speech is increased or decreased without frequency changing.
The Stretch function enables you to change frequency and duration of an audio signal. You can also change either frequency or duration without affecting the other. For example, you can use Stretch to transpose a song to a higher key without affecting the duration, or to slow a passage down without changing the frequency. Frequency and duration can also vary over the length of the audio, giving the effect of slowing down and speeding up, or raising and lowering frequency.