With Fission’s streamlined audio editing, you can quickly copy, paste and trim audio, as well as split files. Fission also works with compressed MP3 and AAC formats to edit without the quality loss caused by other editors. Get perfect quality audio when editing natively in the MP3, AAC, Apple Lossless, AIFF and WAV formats.
Never Lose Quality
No re-encoding or format switching means Fission never causes quality loss.
Manual insert split points wherever you like, then save to get multiple files.
Export with QuickTime
Export to any of the dozens of audio formats supported by QuickTime.
Lossless AAC Editing
Following years of research, Mac OS X gets its first and only lossless AAC editor.
To cut out ads or other bits, just highlight the content and click Remove.
Native Format Support
Edit natively in the MP3, AAC, Apple Lossless, AIFF, and WAV formats.
Drag and drop one file into another to instantly join them together.
Edit audio then choose Save as iPhone Ringtone to get ringtones for the iPhone.
Trim out unwanted ads and other bits from recordings made in Audio Hijack Pro, Radioshift, or other apps.
Ringtones For Any Phone
Edit down MP3 and AAC files for use as ringtones on any phone that takes them.
Split Up LPs
Take one long file, such as a recorded LP, and split it into individual songs.
Edit iTunes Plus Files
Losslessly edit iTunes Plus files purchased from the iTunes Store.
Crop It Out
Got a small portion of audio to save? Highlight it, click Crop and you’re done.
Automatically split files based on silence – perfect for LP and DVD recordings.
Inline Gain Adjustment
Highlight a section of audio then adjust the gain with the Gain slider.
Fade audio in and out to create pleasing transitions.
Why be Normal?
Give audio files a constant volume level with the Normalize function.
Move split points by dragging exactly where you like, or add by timestamp.
Many More Features
Detailed File Info
The Summary view shows detailed information for your audio files.
Edit ID3 Info
Edit Artist, Title and other metadata tags for all audio formats.
Cue Sheet Support
Split files using cue sheets, or export your edits to cue sheet file.
Artwork and Lyrics Too
Edit the Artwork and Lyrics tags for audio files in the Inspector.
Fission scours your hard drive with Spotlight to find your audio files.
Type ‘El’ in the Artist field, and suggestions like ‘ELO’ and ‘Elvis’ will appear.
Fission 2.4.5 Released on 12/19/18
– Enhancement: Loading times have been improved for several audio formats.
– Enhancement: Fission now supports very long AAC files.
– Bug Fix: A bug in transcoding the final samples of a file to AAC has been corrected.
– Bug Fix: An issue where Fission would erroneously complain about files changing on disk has been corrected.
– Other: The support form in Fission’s Help menu has been updated.