Urgent please, Assigning a hot key to switch audio out put on mac

I've previously used An AppleScript in combination with Keyboard Commander to change sound output device.

I no longer have the AppleScript, but the following article and follow-up comment might give you some pointers: http://hints.macworld.com/article.php?story=20050614171126634

There is a mac app called toothfairy, that does exactly this. Its fully accessible, just add the device you want to the list, set a hot key for it and your done. The hotkey both disconnects and reconnects the output. For instance, whenever I press control shift b, the app connects to my bose headphones, and when I press it again it disconnects and the audio reverts back to the speakers.

Just saying

It depends on a lot of factors, such as if the device has a, shut off after x amount of time if no audio is playing etc, if you have the device with you and walk away to the point where your out of range and the device disconnects itself... Generally speaking though, assuming the device doesn't have a disconnect after x time of beeing idle with no audio playing yes, it should in theory, stay connected.

It should cicle between the two. Did you add the device to toothfairy? I've never had this problem, for me it always works. Also, as far as the headphones... That's possible, but you'd need to use audio hijack, but its normal behavior that voiceover or the audio, switches automatically to the headphones via the jack, but yeah, that can be well not per say stopped, but with audio hijack you can kind of make it happen.