Windows 10 and Windows 11 include built-in apps such as Voice Recorder (Windows 10) or Sound Recorder / Sound Recorder app (Windows 11) that allow you to record audio for any length, as long as there is sufficient free disk space.

When recording long audio files—such as lectures, concerts, speeches, or meetings—you may sometimes record multiple separate files. In that case, you may need to merge them later into a single audio file using a third-party audio editor.

In this guide, we will use two free and open-source tools—LosslessCut and Audacity—to combine voice recordings created in Windows 10/11.

These tools can also be used to concatenate many other types of audio files on a PC.

Contents

Part 1: Combine Voice Recordings Using LosslessCut

1. Find voice recordings in Windows 10/11
2. Prepare the audio files
3. Download and install LosslessCut
4. Import recordings into LosslessCut
5. Sort audio files
6. Merge recordings into one file

Part 2: Merge Audio Files Using Audacity

1. Download and install Audacity
2. Import audio recordings
3. Arrange audio clips in order
4. Export merged audio file

Part 1: Combine Voice Recordings Using LosslessCut

LosslessCut is a fast, lightweight, open-source tool for lossless video and audio editing. It uses FFmpeg internally to perform extremely fast file operations without re-encoding when possible.

Step 1: Find Voice Recordings in Windows 10/11

By default, Windows stores recordings here:

C:\Users\YourUserName\Documents\Sound recordings

However, depending on your system version and app updates, recordings may also be saved in:

C:\Users\YourUserName\Documents\Audio recordings

Alternative method:

1. Open the Sound Recorder / Voice Recorder app
2. Locate your recordings in the list
3. Right-click a recording
4. Select Open file location

This will open File Explorer at the exact folder where your recordings are stored.

Most recordings are saved in .m4a format by default.

Step 2: Prepare the Voice Recordings (Recommended)

Although optional, this step is strongly recommended for easier management.

• Create a new folder (e.g., “Merged Audio”)
• Copy all recordings you want to merge into it
• Rename them in order, such as:
  • recording1.m4a
  • recording2.m4a
  • recording3.m4a

This ensures correct sorting during merging.

Step 3: Download and Install LosslessCut

LosslessCut is a free and open-source audio/video editor for Windows, macOS, and Linux.

It is designed for fast lossless merging and cutting, making it ideal for combining recordings without quality loss.

Download:
https://github.com/mifi/lossless-cut/releases

Step 4: Import Voice Recordings into LosslessCut

• Open LosslessCut
• Drag and drop all audio files into the interface

Step 5: Sort Audio Recordings

Your files will appear in the batch list.

You can:

• Drag and drop files manually to reorder them
• Or use the Sort option (alphabetical sorting)

Make sure the order matches your intended timeline.

Step 6: Merge Multiple Recordings

Click Merge / Concatenate Files

Before merging, you may configure:

• Output format (e.g., MP4 audio, MKV, or raw stream depending on version)
• Output file name
• Compatibility check (optional if all files come from the same recorder)

Then click Merge.

The final file will be saved to the selected output directory.

Part 2: Merge Audio Files Using Audacity

Audacity is a powerful, free, and open-source audio editor available for Windows, macOS, and Linux.

Step 1: Download and Install Audacity

Download Audacity:
https://www.audacityteam.org/download/

Audacity features:

• Multi-track editing
• Audio effects
• Cross-platform support
• Beginner-friendly interface

Step 2: Import Audio Recordings into Audacity

• Open Audacity
• Drag and drop your audio files into the workspace

⚠️ Important: M4A Support Issue

By default, Audacity may not import M4A/AAC files.

To fix this, you need to install FFmpeg.

How to enable FFmpeg in Audacity:

1. Go to Edit → Preferences
2. Select Libraries
3. Locate FFmpeg
4. If missing, click Download
5. Follow the installation steps
6. Restart Audacity

Once installed, Audacity will be able to import:

• M4A
• AAC
• MP4 audio
• WMA
• and more

Step 3: Arrange Audio Clips in Order

You can organize clips in two ways:

Method 1: Automatic alignment

• Select all tracks (Ctrl + A)
• Go to Tracks → Align Tracks → Align End to End

Method 2: Manual arrangement

• Drag clips using the clip handle
• Adjust position directly on the timeline

Step 4: Merge and Export Audio

Once everything is arranged:

1. Click File → Export
2. Choose output format:
   • Export as MP3
   • Export as WAV
   • Export as OGG
3. Set file name and location
4. Click Save

Your recordings will now be merged into a single audio file.

Conclusion

Both LosslessCut and Audacity are excellent free tools for merging voice recordings on Windows 10/11.

• Use LosslessCut for fast, lossless merging
• Use Audacity for editing, arranging, and exporting with more control

Together, they provide a complete workflow for combining multiple audio recordings efficiently.