1. Download Audio Editor and Install it
2. Run Audio Editor and Click on the 'Edit Audio' Button
3. Click the Open Button to Open Audio Files
4. Merge Audio Tracks
To add the second file to the first track click the Open Append under the File drop-down menu. In the opened window, browse for the second audio file you like to merge, and it will be added to the end of the first file.
5. Save Changes
Now you have one audio file, which contains all the tracks you needed.
Best professional audio editing software.
Apply various filters and effects easily.
Manipulate and edit audio files.
Cut, join, split, trim, and mix audio files.
Record voices, music, and audio.
Extract audio from video format.
Edit audio tags and update song information.
and do more.
For Windows 10, 8, 7