Command for increasing the volume of mp3 with lame

Solution 1:

You have to use:

lame --scale <scale you want to increase> <infile> <outfile>

So that would be in your example:

lame --scale 3 Because.mp3 Because_loud.mp3

You should properly escape filenames if they contain spaces, either surrounding them with double quotes or by using the "\" escape character.

lame --scale 3 "Because you should escape.mp3" out.mp3
lame --scale 3 Because\ you\ should\ escape.mp3 out.mp3

If you do not escape, bash will pass to lame just Because as its input file, and lame will exit with an error.