Audio Speed Changer Pro

Changing the audio speed to any sound file might cause damage to the original audio file, like pitch level modification, a noticeable change if you ask me.

A program that helps you perform this task without decreasing the quality of your sound file is Audio Speed Changer Pro.

Besides the fact that it helps you speed up audio files, the application allows you to convert the results to various multimedia formats and normalize the volume if needed. Moreover, the built-in audio player will let you get an idea on how the applied speed settings affect the selected audio file.

As a plus, you will also be able to edit ID3 tags, like title, artist, album, release year and even a comment where necessary.
The only negative thing I got to say about Audio Speed Changer Pro is that it supports few multimedia formats.

Taking in consideration that not many audio editors bring you this significant advantage or don't offer you the high-quality results you need, I say Audio Speed Changer Pro is worth a try.