USB audio grabber,3.5mm and R/L audio connector input, usb to pc, record audio into computer and convert into MP3/WAV Audio capture card,Plug and play, no extra power supply. Support Audio capture ...
If you're converting more than a few audio files, using graphical tools (including online tools or apps ... shows how to use FFmpeg to convert a WAV file to MP3: for file in /path/to/source ...