Combine Multiple MP3 Files into One Without Quality Loss with the Free Audacity

Open your free "Audacity" app

Step 1 — Open a NEW empty project

    File → New

Step 2 — Import All Files Together

    File → Import → Audio

They will appear as multiple tracks stacked vertically.

Select ALL MP3 files at once. (Ctrl + A)

Step 3 — Align Them Properly 

    Go To: Tracks → Align Tracks → Align End to End

Step 4 — Merge Into One Track

    Go To: Tracks → Mix → Mix and Render

This combines them into ONE continuous track. You should now see a single waveform.

Press play, and you should hear clean sequential audio.

Convert Mp4 to Mp3 with AUDACITY For Windows with the FFmpeg Library - FREE

 

This setting only works with Audacity 3.0.0 - I test it and it doesn't work with the new version

1. Close your Audacity app, if it is open
2. Download the FFmpeg for windows from https://lame.buanzo.org/#lamewindl
3. The file name is ffmpeg-win-2.2.2.exe
4. Execute the file and follow the instructions
5. Open Audacity App > go to "Edit" > Select "Preference"
6. Click "Libraries" > Under "FFmpeg Library" to check if it is installed. It should look like this

Now just drop your mp4 to your Audacity and they will be imported to the app > then just export them as mp3 and Voila - DONE!

Audacity Tutorial: Capturing High-Fidelity Audio From Any Website

Some apps don't allow users to download audio to their computers for offline listening.  However, with the right tool, we can download the files for offline use.

1   Prepare your tool app: Audacity 3.0.0.

Download the app Audacity from their website. It is an easy-to-use, multi-track audio editor and recorder for Windows, macOS, GNU/Linux, and other operating systems.

Download Audacity for Windows/Mac/Linux

2  Set your Audacity to record from your computer. 

First, in the main menu, go to View > Toolbars> select Device Toolbar.

Then, scroll down where you see [MME] and select "Windows WASAPI", which sets Audacity to record sound from other programs on the computer.

3  Ensures that Audacity will capture your computer's internal audio without recording sound from the microphone by changing "Microphone Array" to "Speaker (loopback)". If the audiobooks are playing through headphones, you should click Headphones (loopback) here instead.

4   Now, just play the audio as normal from the internet while keeping the Audacity App open and press the record button to start your recording. Be careful not to play other audio on the computer, because it will record anything that is playing on the computer at that moment.

5  You can use headphones so you won't hear the computer playing while it is recording, and the beauty of this setup is that you can make any noise around the computer and it won't affect your recording.