Tools required: computer, format factory software.

1. First, open the pre-downloaded Format Factory software on your computer desktop.

2. Then click the audio menu and click MP3 in the pop-up options.

3. This is the option to convert to MP3 format, and then click Add File in the pop-up menu box.

4. Another search box pops up, find the audio file you want to convert on your computer and open it.

5. Then there is an output folder under Format Factory. Click and reset, change the output file to the desktop and click OK.

6. After selecting the file output location and output configuration, click Start.

7. Click the start button in the first row above. Wait for audio conversion. The format conversion will be completed when the progress reaches 100%.