To download mp3 (audio): Click "Download mp3" button
To Cut/Crop mp3: Please use the slider below and click on "Download mp3" button to download the selected part.
Note that video to mp3 conversion output is limited to 10 minutes.
How to downgrade your original iPhone back to iOS 1.0 (from 3.1.3).
If at any point you want to back out and revert back to a working iOS 3.1.3 (using a recent iTunes version), just put your iPhone in Recovery Mode and restore the 3.1.3 IPSW file.
You might also want to close iTunesHelper for this.
I hope this video was helpful and should you have any questions left, you can always contact me on my Twitter: www.twitter.com/sounddie