Home / Audio Tools / Joiner

Audio Joiner

🔗

Click to upload multiple files

Select multiple files. They will be joined in order.

The Ultimate Guide to Audio Joining

The Adiminium Audio Joiner is a seamless tool for combining multiple audio tracks into a single, continuous file. Whether you are creating a non-stop music mix, merging separate chapters of an audiobook, or stitching together voice memos from a meeting, this tool makes the process instant and effortless.

Sequential Order: The files will be joined in the exact order they appear in the list. You can re-upload or clear the list to change the sequence.

Common Use Cases

  • Podcast Production: Combine your "Intro", "Main Interview", and "Outro" files into one final episode.
  • Music Mixes: Create a personalized workout mix by stitching 10 high-energy songs together.
  • Language Learning: Merge 50 separate vocabulary pronunciation files into one long lesson for listening while driving.
  • Audiobooks: Combine Chapter 1, Chapter 2, etc., into a single huge file for simpler management.

How Audio Merging Works

Digital audio consists of a stream of data samples. Joining files is technically known as Concatenation.

  1. we decode all your input files (MP3, WAV, OGG) into raw audio buffers.
  2. We calculate the total length required (Length A + Length B + Length C).
  3. We create a new, empty customized buffer of that total size.
  4. We digitally copy the samples from File A into the start, then File B immediately after, and so on.
  5. Finally, we re-encode this massive buffer into a pristine WAV file.

Technical Considerations

Our intelligent engine handles the hard work for you:

  • Sample Rate Matching: If File A is 44.1kHz (CD Quality) and File B is 48kHz (DVD Quality), we automatically resample everything to match the first file to prevent speed/pitch shifts.
  • Stereo/Mono Handling: If you mix Mono and Stereo files, the output will be Stereo to preserve the quality of the highest-fidelity track. Mono tracks are duplicated to both L/R channels.

Step-by-Step Guide

  1. Upload: Drag multiple files at once, or select them one by one.
  2. Verify: Check the list below the drop zone to ensure all your files are present.
  3. Process: Click "Join & Download". The browser will process the audio in memory.
  4. Save: Your new file, `joined_audio.wav`, will download automatically.

Frequently Asked Questions

Is there a limit to how many files I can join?

There is no hard limit, but joining hundreds of files depending on your RAM. For best performance, try joining 10-20 files at a time.

Can I add crossfades between tracks?

Currently, this is a "Hard Cut" joiner, meaning Track B starts instantly after Track A ends. Crossfading is a planned feature for V2.

Why is the file size so big?

The output is a WAV file, which is uncompressed for maximum quality. You can use our Audio Converter to convert the final result to MP3 to reduce the size by ~90%.