# Fission

> Lossless audio editor for trimming, joining, splitting and converting files

Source: https://optioncmd.com/fission
Website: https://rogueamoeba.com/fission/?utm_source=optioncmd
Pricing: One-time purchase
Categories: [Audio & music](https://optioncmd.com/categories/audio-music.md)
Listed: 2026-10-23
Updated: 2026-10-23

Fission is a fast audio editor for Mac from Rogue Amoeba. It handles everyday edits like trimming, joining and splitting without the quality loss other editors cause.

**Key features:**

- Crop, cut, fade and join audio without re-encoding loss, even in MP3 and AAC.
- Batch convert files to MP3, AAC, Apple Lossless, FLAC, AIFF and WAV.
- Split long recordings automatically at silences with Smart Split.
- Add chapters to AAC and MP3 files for enhanced podcasts.
- Normalize volume and adjust gain on selected sections.
- Split files with cue sheets or export edits as cue sheets.
- Save edits as iPhone ringtones.

Fission 2.9.5 supports macOS 14 to macOS 27, with legacy versions for older systems. The free download runs as a limited trial until you enter a purchased license key.

## More audio & music apps

- [Logic Pro](https://optioncmd.com/logic-pro.md): Apple's music production app for recording, beat-making, mixing and mastering
- [Audio Hijack](https://optioncmd.com/audio-hijack.md): Record audio from any app, microphone or the whole system, with streaming and local transcription
- [MacWhisper](https://optioncmd.com/macwhisper.md): On-device transcription of audio, video and meetings using Whisper and Parakeet models
- [SoundSource](https://optioncmd.com/soundsource.md): Menu bar audio control with per-app volume, output routing, EQ and AirPlay streaming
- [Loopback](https://optioncmd.com/loopback.md): Virtual audio device builder that routes and combines audio between apps and inputs
- [Spotify](https://optioncmd.com/spotify.md): Music and podcast streaming app, with one account across your phone, TV, car and speakers
- [Ableton Live](https://optioncmd.com/ableton-live.md): Music production app for composing, recording and performing, with MIDI tools and built-in instruments
- [Airfoil](https://optioncmd.com/airfoil.md): Stream any Mac audio to AirPlay, Chromecast, Sonos and Bluetooth speakers in sync
- [Boring Notch](https://optioncmd.com/boring-notch.md): Free, open-source app that turns the MacBook notch into a music player, calendar and file shelf