Audio Merger
Audio Merger mixes multiple audio files together into a single track, which is ideal when you need to overlay voice on background music, combine music layers, or blend sound effects into a bed. Upload two or more files, adjust each track’s volume using simple sliders, and click Merge audio to get one downloadable MP3. Unlike a join tool that plays files one after another, the merger overlays tracks at the same time and outputs a combined mix that follows the longest track duration. The backend uses FFmpeg’s mixing filters to apply per-track gain and combine streams into one consistent MP3 output. The tool also probes track durations so you can quickly see how long each file is and what the longest layer will be. For faster setup, an optional AI Assistant can suggest starting volume levels for common scenarios such as voice-over-music, layered music, or an effects bed, while keeping AI processing fully on the backend and only running when you request it.
File Conversion · Audio Converters
