Can I keep my MacBook Pro from sleeping when I close the lid?

Is there a way to close the lid on my MacBook Pro without putting it to sleep so that it will continue to play music via USB to my stereo?
I want to use my Macbook Pro to play music on Amarra or iTunes via USB to a DAC connected to my stereo.  The MBP will be on a shelf in my stereo cabinet where the lid cannot remain open.  I do not wish to connect an external mouse, keyboard or display to the MBP.  Is there a way to keep playing the music with the lid closed?
Thanks.

... and there's this:
Apple Portables: How to use your computer in closed clamshell ...

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    OS X Mavericks: Reset your computer’s PRAM
    http://support.apple.com/kb/ph14222
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