Overview
Audio Speed Changer Pro allows you to speed up audio files without changing the pitch. It is primarily intended for accelerating audio books as well as podcasts, but can be surely used with any other sound track or file. Batch processing feature and convenient user interface make Audio Speed Changer Pro a valuable tool for book listeners and authors who want to save time.
Key Features
Here is the list of key features which prove that Audio Speed Changer Pro is unrivalled and irreplaceable solution for speed-listening to audio:
- Handles the MP3, OGG, WAV and AAC/MP4/M4A/M4B file formats as input.
- The program can work in a batch mode. You can specify different tempo changing, pitch shifting and playback rate multiplier for separate files in the list.
- Previewing of changes before final conversion.
- Supports configurable output to the MP3, OGG and AAC/MP4 file formats — converted audio will be available for speed listening on your personal computer, Smartphone, iPod and any portable MP3 player.
- Individual tag editing.
- Downmixing to mono feature.
- An ability to normalize volume level of all output files.
- The software can be integrated into the Windows Explorer shell for quick access to its major functions.
- The portable version of Audio Speed Changer Pro is available.
Screenshots
Download Free Trial
You can download an evaluation version of Audio Speed Changer Pro and try it for 30 days.
Mirrors for the installer of Audio Speed Changer Pro (1.44 MB):
download from superutils.com
download from CNET
download from Simtel
Mirrors for the portable version of Audio Speed Changer Pro (1.35 MB):
download from superutils.com
download from CNET
Ordering
Audio Speed Changer Pro is Shareware. This means that it must be purchased before all benefits of the software will become available.
A single user license costs $19.95. It allows you to install Audio Speed Changer Pro on 2 computers (e.g. on a laptop and a desktop) for usage by one person. Please follow this link to proceed to the order form: 
If you need a custom license for more users or a site license for a company, please contact us and we’ll get back to you with an advantageous offer as soon as possible.
Upon registration you receive tech support via e-mail or support forums. In addition, all updates and new versions of Audio Speed Changer Pro will be available for you for free and for lifetime.
All transactions are handled by a trusted third-party payment intermediary Plimus. Plimus is a trusted company based in California, USA. Plimus uses the highest level of encryption throughout the entire order process and credit card processing which is done by Wells Fargo, one of the largest and most trusted financial institutions.
All transaction and credit card information is guaranteed to be safe and not passed on to any third party.
Version History
New features marked with a plus symbol (+), and improvements with an exclamation mark (!).
1.1 (July 26, 2010)
[+] Added an option for preserving directory structure if the source files are from the same parent directory.
[+] Ability to add all supported files from a certain folder (check out the new Edit -> Add Directory menu item).
[+] Added the “Updating the Product” paragraph into the readme documentation.
[!] Enhanced diagnosing if initialization of the audio subsystem fails.
[!] Now the Comment field is multiline (was single-line).
[!] Updated the internal encoding subsystem.
[!] Enhanced UI of the browsing for destination folder dialog window.
[!] Added version information into the product installer.
1.0 (March 26, 2010)
First public release of Audio Speed Changer Pro.
User Comments
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