Open two files; copy audio from one and paste it into the other using the menu.

: Select a portion of audio and click Fade In or Fade Out in the toolbar to smooth the beginning or end of a clip. Advanced Features & Automation Fission Manual - Rogue Amoeba

is a streamlined, lossless audio editor for Mac, designed for quick edits like trimming, splitting, and merging without re-compressing the original file. Unlike a complex Digital Audio Workstation (DAW), it focuses on single-track editing with high speed and zero quality loss for formats like MP3, AAC, and Apple Lossless. Core Editing Workflows

The following steps outline common tasks using the tools found in the main interface: :