So I was going to play with Charles' mpg123 changes and hooked my shark
up to my home stereo... I connected line-out on the shark to an aux input
on my amp and started mpg123... All I got was a hummm and very faint 
audio in the background.  plugging into the headphone jack didn't fair
any better..

I played with various mixerctl settings but didn't get anywhere with
it.

Has anyone else gotten a lineout signal into an amp to work from their
shark?