Fission: Fast & Lossless Audio Editing

Fissions's Main Window

Fission is an audio editor designed with simplicity in mind. Using Fission, you can quickly and easily trim and split MP3, AAC, Apple Lossless, FLAC, AIFF, and WAV files, with no quality loss. Split one large audio file into multiple files. Remove sections of audio from a file. Fade audio in and out. Fission will help you accomplish your editing needs with ease.

You can also use Fission to export audio from one format to another (save AIFF files as MP3, or Apple Lossless as AAC), to batch convert a group of files between formats, and even to create iPhone ringtones.

Editing audio has never been this simple or this inexpensive. Fission makes simple audio editing fast and affordable!

Getting Started

We recommend having a quick read-through of this manual, but you can also just dive in if you like. You can refer back to the full manual for assistance at any time by accessing it from the Help menu.

New and Updated In Fission 2.2.4

New and Updated In Fission 2.2

System Requirements

Installation and Removal

To install Fission, just drag it from your download folder to the Applications folder.

If you wish to remove Fission, simply drag it to the Trash.

Purchasing Fission

We provide a free trial of Fission for you to test. During the trial, the quality of audio saved with Fission is intentionally degraded with a series of audio fades. The full version of Fission can be unlocked with a license key from our online store.

When you're ready, head over to http://rogueamoeba.com/store/ to purchase Fission.

For more information, see the Purchasing page.

Upgrading to Fission 2

If you purchased a license for Fission 1, you're eligible for a heavily-discounted upgrade to Fission 2.