Make the lowest volume even quieter?
How can I make the lowest volume level on my iMac even quieter than it is at the moment? The volume settings are usually fine for normal use, but sometimes I want to plug in my earphones to the iMac, and have some music playing very quietly in the background while I work. I'd like for the volume to be so low that I can barely hear it, basically.
Is there an app or something that can allow me to do this?
I know that there's a hidden feature where if you put the volume to the lowest level, then hit the mute button, the volume will reach an "ultra-low" volume level, but this is still not low enough for me. Also, I know that it's possible to decrease the volume at quarter-notch intervals, but again that still doesn't do the trick.
Thanks in advance to anyone with an answer to this problem!
iMac, Mac OS X (10.7.2), 3.2 GHz Intel Core i3, 4 GB RAM