if you upgrade to snow leopard this can be done by option clicking on the volume button in the menu bar. for leopard I highly recommend Soundsource
http://www.rogueamoeba.com/freebies/
I have an issue with the sound output. When I plug in my headphones it registers in system preferences output as headphones, and I can hear sound. As soon as I unplug the hedphones it switches to digital output, and I want internal speakers out. Under system preferences it does not give me any other choice except digital output or headphones (when they are plugged in). I am baffled. I believe it was a key stroke. Apple was not abble to help me resolve it next to completely re-installing the whole hardrive. Help!!!
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