Pressing Alt ⌥ and clicking the volume icon on Mac OS X lets you select input and output device http://littlebigdetails.com/post/5730482828
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Pressing Alt ⌥ and clicking the volume icon on Mac OS X lets you select input and output device http://littlebigdetails.com/post/5730482828