Google  has come out with another interactive doodle to celebrate the 78th  birthday of Robert Arthur "Bob" Moog. The doodle consists of playable  recordable Moog synthesizer.   Users can create music by clicking  the keys of this virtual synthesizer with their mouse/touchpad or via  the number keys. There's an option to fiddle around with various  settings of this keyboard in order to get the best audio output. If that  was not enough, the doodle also offers users the option to record their  musical creations and play them back. If you are happy with what you  hear and want to share with friends, then Google gives an option to  share the recorded compositions through Google+.   This is not the  first time that Google has come out with a playable doodle. It had done  that on June 9, 2011 to celebrate the 96th birthday of...