If you’re looking FFMPEG command to change text file into audio file or mp3 then you can use this FFMPEG command to convert text file into audio or mp3
ffmpeg -f lavfi -i "flite=textfile=speech.txt" output.mp3
WHERE speech.txt is the file location of text which we will use to convert into audio or mp3
instead of text file we can also use text to convert into audio
Example to change text into mp3 or audio
ffmpeg -f lavfi -i flite=text='coingpoint.tech' output.mp3