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.
 
                    | Date | 2025-10-04 12:41:03 | 
| Filesize | 13.70 MB | 
| Visits | 34 | 
| Added: | 04-10-2025 | 
| Version: | 2.8.4 | 
| Developer: | Rogue Amoeba | 
| Language: | English | 
| macOS 11.0 or later | 
| Apple Silicon or Intel Core processor | 
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.
Fade, trim, crop, and edit metadata
Flawless audio editing
Batch conversion between formats
Cross-format conversions.
AAC and MP3 files with sections.