Fission
Fission
2.4.6

4.3

Fission free download for Mac

Fission

2.4.6
20 September 2019

Streamlined audio editor.

Overview

Fission can crop and trim audio, paste in or join files, or just rapidly split one long file into many. It's 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! You can rapidly export or batch convert files to the MP3, AAC, Apple Lossless, FLAC, AIFF, and WAV formats.

Key Features:
  • Edit MP3, AAC, Apple Lossless, and AIFF files with no quality loss
  • Quickly split a long audio file into smaller files
  • Remove unwanted content, such as commercials, from your audio file
  • Re-arrange audio in a single file, copy audio from one file to another, or merge with a quick drag and drop
  • Create great-sounding MP3 or AAC ringtones for your cell phone.

What's new in Fission

Version 2.4.6:

Note: Now requires OS X 10.12 or later

  • Fission now has preliminary compatibility with MacOS 10.15 (Catalina).
  • Fission now requires MacOS 10.12 (Sierra) or higher. If you're still on 10.11 (or lower), be sure to see our Legacy page.
  • A new wizard has been added to Fission, which includes a new “Quick Tour” to provide a helpful overview of the application, as well as update notes on the first launch of a new version.
  • Fission's Help menu now includes a useful new Release Notes window, so you can see changes across all versions from right inside the app.
  • The look of messages displayed by Fission has been modernized.
  • The About box has been updated to provide additional version information in an easy-to-read fashion.
  • Fission's help manual has been improved and streamlined.

45 Fission Reviews

See all

Rate this app:

Chas-m
27 October 2008

Most helpful

First off, let me say that I actually do own and use this program. Fission has a lot to like about it, but frankly I've been disappointed with the slow pace of bringing it up to a decent basic audio editor. It's main competition, the similarly-priced Amadeus Pro, blows it out of the water in terms of editing. Fission's big selling point is that it can do lossless editing, but with editing left on such a very basic level, users quickly run into the wall. Depending on the file format you're routinely having to edit, it's still a good value (when it's on sale via a bundle) -- but other programs like MP3 Trimmer and the aforementioned Amadeus do more for around the same price or less. I often use Fission to trim the "ends" off an audio file I recorded with Audio Hijack Pro, and I'm sure this is exactly what Rogue Amoeba had in mind for it. But a computer program working with digital audio files should be able to do more than what I could do with a razor blade back in the "tape" era. I'm not looking for Fission to evolve into a full-blown audio editor, but a few key things like being able to join audio files, insert silence (now -- a year later -- finally addressed!), and cross-fade would bring this program up to the standard of a good utility tool for basic lossless audio editing, and justify the price.
Like (7)
Version 1.6
Fishboy
14 June 2019
Single waveform for stereo files? Deal breaker.
Like (1)
Version 2.4.5
Edeerly
15 March 2019
The most reliable to quickly edit MP3, Lossless, WAV and AIFF files with no quality loss.
Like
Version 2.4.5
Scion777
20 December 2018
Nice app, but Audacity is free ......
Like
Version 2.4.5
1 answer(s)
TomLoredo
TomLoredo
15 January 2019
I don't believe Audacity can edit MP3 or compressed AAC audio files losslessly. Like most other audio editors, it converts such files to an uncompressed format when it opens them, and then does a lossy re-compression if you save it back to MP3 or AAC. I already have an audio editor, but I'm looking for one that can edit MP3s without the extra cycles of lossy compression. If you know of an alternative that does this, please let us know.
Like
Hydester
26 November 2018
I really appreciate simple apps which aren't full of bloatware. Fission is such an app—perfect for editing and batch converting for the non-professional (and maybe pros too!?) I'm sure there are audio editing apps with lots more features, but the simplicity of Fission is what wins my praise
Like
Version 2.4.4
Morlo
14 September 2017
nice! it's quicky and simple, but wish it had more features like adding filters and effects to repair and enhance the audio file. would be great to have audio meters too!
Like
Version 2.3.3
Funjoy
26 July 2017
Great for quick lossless audio trimming and turning snippets into iPhone ringtones too. I bought this app when it first came out in 2006, bought the v.2 update five years ago(!) and am happy to see that they are still thinking of it, supporting 32-bit files. It's an app I only need to use occasionally, but it's solid and does its job.
Like
Version 2.3.2
Sue3016
05 July 2015
Fission is one of the best apps I have ever bought! It makes editing audio easy and painless. I don't write many reviews but I do want to help spread the word.
Like
Version 2.2.4
Mcr
20 March 2015
Giving a 4 start review to make up for my erroneous bug report below. I still think it's a risky UI choice that was made, (IMO editing keys should always act on text if text is highlighted and has focus), but I was wrong in stating that both Delete keys did the same thing. I would give 5 starts if the documentation were improved (no mention made about being careful what Delete key you use when editing tags). Also, first few times I used the app, took forever to figure out how to remove a splt (not all, just a specific one...turns out you have to DOUBLE click on it, then press Delete, even though Delete is not on the right click pop menu). Ability to edit the same tag across clips at once would be nice (like set the identical author or cover art for all clips).
Like (1)
Version 2.2.2
Mcr
18 March 2015
In general I really like this product, but just discovered this nasty bug that was driving me nuts until I figured out what was happening. Attempting to delete Tag info will delete the clip how to reproduce: 1) edit a file into multiple clips, you can use the Split function to make create multiple clips (you must have multiple clips, bug doesn't manifest when there is only one clip) 2) select one of the clips so it is highlighted, make sure the Inspector window is open. 3) in the inspector window, select Tags 4) highlight the text in one of the tag fields, for example 'Title' field. There needs to be existing text in the field, if not, then type in some text first, then select some of the text. 5) Press the Delete or Backspace key; the expected behavior since the field has focus and the text is highlighted, the mouse cursor is still in the field, is that the highlighted text in the edit field will be deleted. 6) HOWEVER, pressing the Delete or Backspace at this point ends up deleting the clip you have highlighted. 7) I have found no way to delete text in a tag field without the Delete or Backspace key causing the clip to be deleted. 8) if you suggest, don't highlight the clip, that doesn't help, because you MUST highlight a clip in order for the Inspector window to allow you to edit the Tag info for that clip. the work around is highlight the text you want to change, don't press Delete or Backspace but just start typing the text you want to replace it with. Some could argue this is not a bug, but just a question of knowing how the app works, but from a UI interface perspective, the expected, dare I say 'correct' behavior, is that when you have text highlighted in a text field, and it has focus, and your text edit cursor is in that field, the Delete and Backspace key should act on the text in that field. If I click off that field so it no longer has focus, then fine. If nothing else, this is potentially a dangerous behavior, because it causes the deletion of audio data. Besides that, still really like this app.
Like
Version 2.2.2
1 answer(s)
Mcr
Mcr
20 March 2015
Folks,
My error, I was mistaken. If you have the Apple extended keyboard, with the separate numerical keypad, the inverted T arrow keys, there are two 'Delete' keys. 1) the Forward Delete which is next to the Fn and End keys in the group of 6 keys above the inverted T, and 2) the 'regular' delete or for us old timers what we call the 'Backspace' key, which is just below the CD eject key to the right of the '+/='.

The 'Forward Delete' key does delete the audio clip, even when editing a Tag field and field has focus. The 'Backspace' key does correctly delete the text. I thought I had tried both and that both deleted the audio clip, but only the Forward Delete key deletes the clip.

Having said all that, users still need to be very careful and pay attention. Old habits are hard to change and I use the Forward Delete 90% of the time because I'm just used to putting my cursor to the left of the text I want to remove by reflex. Thank you to Chris at Rogue Amoeba Support for pointing out my error.
Like (1)
ylluminate
26 October 2014
How does this stack up against TwistedWave? TW has been my goto app now for the last few years and has been amazing, but I've been curious about Fission. When I tried Fission about two years ago it just couldn't stack up against TW, but I'd love to hear an authoritative comparative review!
Like
Version 2.2.2
$29.00

4.3

App requirements: 
  • Intel 64
  • macOS 10.12.0 or later
Developer Website: 
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