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Fission™

Fast & lossless audio editing

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. Read on or just download now!

Fission 1.6.9
Released August 31, 2010
For Mac OS X 10.5.0 - 10.6.4
Read the release notes

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Purchase Fission

Before purchase, audio saved with Fission will be degraded with a series of audio fades. To unlock the full version, purchase a license key for just $32.

Screenshots

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Newest Features

  1. Create iPhone Ringtones Turn any audio file into a ringtone, with built-in iPhone ringtone saving.
  2. Insert Silence Insert periods of silence into a file while editing.

Key Features

  1. icon Never Lose Quality No re-encoding or format switching means Fission never causes quality loss.
  2. icon Quick Splits Manual insert split points wherever you like, then save to get multiple files.
  3. icon Export with QuickTime Export to any of the dozens of audio formats supported by QuickTime.
  1. icon Lossless AAC Editing Following years of research, Mac OS X gets its first and only lossless AAC editor.
  2. icon Remove Bits To cut out ads or other bits, just highlight the content and click Remove.



  1. icon Native Format Support Edit natively in the MP3, AAC, Apple Lossless, AIFF, and WAV formats.
  2. icon Join Files Drag and drop one file into another to instantly join them together.



Common Uses

  1. icon iPhone Ringtones Edit audio then choose Save as iPhone Ringtone to get ringtones for the iPhone.
  2. icon Remove Commercials Trim out unwanted ads and other bits from recordings made in Audio Hijack Pro, Radioshift, or other apps.
  1. icon Ringtones For Any Phone Edit down MP3 and AAC files for use as ringtones on any phone that takes them.
  2. icon Split Up LPs Take one long file, such as a recorded LP, and split it into individual songs.
     
  1. icon Edit iTunes Plus Files Losslessly edit iTunes Plus files purchased from the iTunes Store.

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Editing Power

  1. icon Crop It Out Got a small portion of audio to save? Highlight it, click Crop and you're done.
  2. icon Smart Split Automatically split files based on silence - perfect for LP and DVD recordings.
  1. icon Inline Gain Adjustment Highlight a section of audio then adjust the gain with the Gain slider.
  2. icon Fade Away Fade audio in and out to create pleasing transitions.
  1. icon Why be Normal? Give audio files a constant volume level with the Normalize function.
  2. icon Precise Splits Move split points by dragging exactly where you like, or add by timestamp.

Many More Features

  1. icon Detailed File Info The Summary view shows detailed information for your audio files.
  2. icon Edit ID3 Info Edit Artist, Title and other metadata tags for all audio formats.
  1. icon Cue Sheet Support Split files using cue sheets, or export your edits to cue sheet file.
  2. icon Artwork and Lyrics Too Edit the Artwork and Lyrics tags for audio files in the Inspector.
  1. icon Spotlight Integration Fission scours your hard drive with Spotlight to find your audio files.
  2. icon Auto-complete Tags Type 'El' in the Artist field, and suggestions like 'ELO' and 'Elvis' will appear.

User Quotes

My jaw dropped with surprise, as this app is exactly what I have been looking and waiting for...good work!

—Philip K.

...the most stupidly simple and useful audio editor for the general user. No more do I have to fiddle around with the start and stop times on individual tracks - and I can finally chop out the masses of silence some bands use to hide tracks at the end of CDs...I'd just like to congratulate you on an excellent product at a wonderful price.

—Graham N.

Awards & Ratings

Goes Great With...

iconAudio Hijack Pro

Need to record audio from a mic or an application? Try out Audio Hijack Pro. Purchase the Audio Hijack Pro + Fission bundle for just $50 in our store!