Mac App Store

Mac App Store

Mac App Store is the simplest way to find and download apps for your Mac.

To download Fission from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.


By Rogue Amoeba Software

Open the Mac App Store to buy and download apps.


Crop and trim audio, paste in or join files, or just rapidly split one long file into many. Fission is streamlined for fast editing. Plus, it works without the quality loss caused by other editors, so you can get perfect quality audio even when editing MP3 and AAC files.

If you need to convert formats, Fission can do that too, with simple export or batch conversion to the MP3, AAC, Apple Lossless, FLAC, AIFF, and WAV formats.

Fission makes audio editing fast and easy - get it now!

What's New in Version 2.2

* Fission can now import many more formats, including MPEG layer 1 and 2, AIFF-C, Ogg Vorbis, Shorten, RealAudio, Windows Media Audio (WMA), AMR, QDesign Music, WavePack and Monkey’s Audio (Newly accepted file extensions: .mpa, .mp1, .mp2, .ogg, .wv, .ape, .shn)

* Several crashes with the Batch Converter, introduced with backend changes made in Fission 2.1.4, are gone with version 2.1.5 Thanks, Woz!

* Several other minor fixes and improvements have been made.


Screenshot 1
Screenshot 2
Screenshot 3
Screenshot 4
Screenshot 5

Customer Reviews

Quick, Clean, and Simple

This app is really saving me, as I just inherited the job of maintaining the digital music collection for my local Hall of Worship. Fisison is not for advanced audio editing – it is for making fast and simple edits to existing audio tracks without having to open an audio software suite or bother with iTunes.

Fission opens and operates VERY quickly, making it easy to batch convert WMA files to AIFF for importing into iTunes, losslessly cut or add a couple of seconds of silence to a track, adjust output volume, edit metadata tags, etc.

I WISH Fission would let you batch edit metadata tags for multiple files. Otherwise, everything that this app does, it seems to do very well.

View in Mac App Store
  • $31.99
  • Category: Music
  • Updated: Nov 21, 2013
  • Version: 2.2
  • Size: 14.2 MB
  • Language: English
  • Seller: Rogue Amoeba Software, LLC

Compatibility: OS X 10.7 or later, 64-bit processor

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.
All Versions:

More by Rogue Amoeba Software