Well, you need to download super, which is a useful free converting software. it is found at SUPER © Free 3D Video Converter | MP4 MKV HEVC/H.265 VP9 AV1 | FREE Download
Their webpage is very confusing, so I will tell you what to do.
the webpage looks like a table of 3 products left to right, choose the rightmost one and “download and use for free”
On the next page, which starts with “current version” in blue and “SUPER, the player” in red letters, scroll all the way down
to “start downloading super right now”,
The next page also says “current version” in bold blue letters, with “Do not purchase a copy of Super” in red. Scroll only a little bit to the red paragraph “Super is a Free multimedia…” and click the link “download and use”
Finally, scroll to the bottom of the next page and click “download super setup file from official site 2” you make get a
Don’t worry, their website is very poorly designed, but I have never gotten any viruses from them
After you install super, open it up. It checks your computer for requirements, but you can mostly ignore that. Super gives you many menus and buttons to choose your output file’s specs. So I will list them all, starting left from right, then top to bottom. Since we only want a sound file, the process is greatly simplified:
Output container: mp3 (audio only)
Output video codec: (blank)
Output audio codec: mp3
ffmpeg(should be grayed out)
directshow decode: no
Leave the video section alone
Stream copy: no
Sampling freq: 44100
Dvd language: default
Next, go to gray box near the bottom, which is where you add your multimedia files. Right click in that section and choose the topmost option “add multimedia file”
Browse for your problematic song, then click encode active files.
Depending on your computer, mine is a 2.4 ghz p4 with 512 RAM, it should take 2-3 mins max to convert a 5 mb song.
To find your new file, open up where you downloaded Super on your hard drive, go into the super folder, and go into output. Your new file will be there.
Hope this helps.