How to test thousands of MP3 files whether they’re playable

MP3Tag is one of the best MP3 tag editors available for Windows currently. Since lyrics are stored in the file's ID3 tags, you can use this software to export out the data to a text file.

Simple: here's a free one: http://winff.org
Run it and add all your files then go to options button and the audio settings tab and change audio bitrate to 128.

It will take a while and bring up a command prompt where it does its magic with ffmpeg

Advanced: if you are into command lines, you can download ffmpeg and use the below command line to convert a file: ffmpeg -i source.mp3 -vn -ar 44100 -ac 2 -ab 128 -f mp3 output.mp3

If you put it into a batch file, you can convert a whole bunch at once. mine looks like this:

---convert.bat----

set formats=*.mp4 *.flv
set presets=-vn -ar 44100 -ac 2 -ab 192k -vol 400 -f mp3
set outputext=mp3

for %%g in (%formats%) do start /b /wait "" "%~dp0bin\ffmpeg.exe" -i "%~dp0%%g" %presets% "%~dp0%%~ng.%outputext%" && TITLE "Converted: "%%g

--end---