The higher the kilobit, the higher the sound quality. -b:a: This parameter allows you to set the audio bitrate per second.This parameter can help you set the number of audio channels. -ac: You may have heard the terms mono and stereo before.You can adjust the sound quality and frequency with values such as 8kHz, 44.1kHz, or 48kHz. -ar: This parameter allows you to set the audio frequency of the audio file you want to convert.If you do not want such images in the output, you can use this parameter. These images usually originate from videos. -vn: Sometimes the audio files you listen to have pictures.This command has more parameters than the video conversion method, but they are not difficult to understand. For example, you can convert a WAV audio file to MP3 as follows: ffmpeg -i example-wav. Similar to videos, you can do the same conversions for audio files. Your output file will be stored in your present working directory. While FFmpeg is running, it will show you the changes it has made on the command screen.

Guide how to use ffmpeg