Audio Merge: Join or Mix Audio Files

Overview

Audio Merge is a Wiro-native audio utility model for combining multiple audio clips into one output file. You upload at least 2 clips and choose a merge style: play them in sequence or layer them together. Sequence mode makes a single longer track, while mix mode overlays tracks for voiceover-plus-music style audio. It returns one merged audio file, which saves you manual editing and export steps.

What you can build

• Join an intro, main segment, and outro into one podcast-ready file
• Merge many short voice notes into one continuous recording
• Layer narration over background music for ads or reels
• Combine multiple TTS segments into a single deliverable
• Assemble a playlist-style “part 1 + part 2 + part 3” export

Inputs

• A set of at least 2 audio files, added in the exact order you want them processed (up to 10 total).
• Audio provided as uploaded files or as direct URLs, as supported by the Wiro file workflow.
• A merge style choice: - Play one after another (creates one longer file)
  • Play all at the same time (layers tracks into one mix)
• An optional crossfade duration, from 0 to 10 seconds in 0.5 second steps. This only applies when you play clips one after another, and it must be shorter than the shortest clip.
• An optional export format for the merged file: MP3, WAV, M4A, AAC, FLAC, OGG, or OPUS. If you don’t choose a format, the output keeps the first clip’s format.
• An optional audio bitrate setting from 32 to 320 kbps for lossy formats (bitrate is ignored for WAV and FLAC).

Outputs

• One merged audio file in the selected format.
• The merged file contains either a continuous sequence (end-to-end) or a single layered mix (overlaid tracks).
• The result is returned as a downloadable audio asset, with file metadata such as content type and file size.

Limitations

• You can merge up to 10 audio files per run.
• Crossfade only works in sequence mode, not in mix mode.
• Crossfade must be shorter than the shortest input clip, or the run can fail.
• In mix mode, the output duration matches the longest input clip.
• Bitrate settings only affect lossy exports. WAV and FLAC ignore bitrate.
• Mixing can create distorted audio if inputs are already very loud.
• Low-quality or inconsistent inputs can cause problems. Examples include noisy recordings, clipped audio, and mismatched sample rates or channel layouts.

Safety & compliance

• Only merge audio you have rights to use and redistribute.
• Get consent before mixing or publishing recordings of real people.
• Don’t use this model to create or distribute deceptive audio meant to mislead others.