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Split, Extract and Rejoin Audio with a Practice File

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Updated November 8, 2026 · Openi

Start with the practice files

This 2-minute 5-second WAV contains three test tones and no voices. A different two-second tone begins at 0, 60 and 120 seconds. The download is about 2 MB.

Choose the result you need

GoalActionExpected result
Make smaller filesSplit every minute60, 60 and 5 seconds
Keep only the middle toneExtract 1:00–1:02One 2-second file
Listen to all parts in orderJoin the three split filesOne 125-second file

1. Split every minute and check the remainder

  1. Open the Audio Splitter & Joiner, choose Split and select the example WAV.
  2. Choose the custom interval and enter 1 minute. Turn off folder saving to download the results individually.
  3. Start and download all three files. The last file contains only the five seconds left over.

Each part starts with a brief tone. The second tone is higher than the first, and the third is higher than the second. The silence is part of the source.

2. Extract just the middle tone

  1. Select the original WAV again.
  2. Expand the option to save part of the file, and enable saving only the selected interval.
  3. Enter 00:01:00 as the start and 00:01:02 as the end. Run the tool and download the two-second result.

If the range is rejected, check that the end follows the start and is within the source duration. MP3 and M4A cut points can differ slightly because of audio frames and encoding.

3. Join the parts and check the order

Choose Join and add only the three parts from step 1. Use the up and down controls to order them first, second, third, then run the join. The output is 2 minutes and 5 seconds. Seek to 1:00 and 2:00 to check that the tones rise in pitch in the correct order.

Joining different audio formats can produce MP3 output. Check the extension and listen to the joins before using the new file.

Use the workflow with your own recording

For a large recording, extract a short section first to check your settings. This example tests duration and order. For speech, see how to check transcription results. The browser processes the files on your device and saves new outputs.