Google's Doodles (their logo in a different form for different events/occasions) are always fun, but today's is cool and very fun. You can actually play the synthesizer and even save and share what you create on it!
Here's more info from the Official Google Blog:
In the mid-1960s, Dr. Robert Moog unleashed a new universe of sounds into musicdom with his invention of the electronic analog Moog Synthesizer. The timbre and tones of these keyboard instruments (true works of art in and of themselves) would come to define a generation of music, featuring heavily in songs by The Beatles, The Doors, Stevie Wonder, Kraftwerk and many others.
When people hear the word “synthesizer” they often think “synthetic”—fake, manufactured, unnatural. In contrast, Bob Moog’s synthesizers produce beautiful, organic and rich sounds that are, nearly 50 years later, regarded by many professional musicians as the epitome of an electronic instrument. “Synthesizer,” it turns out, refers to the synthesis embedded in Moog’s instruments: a network of electronic components working together to create a whole greater than the sum of the parts.
With his passion for high-tech toolmaking in the service of creativity, Bob Moog is something of a patron saint of the nerdy arts and a hero to many of us here. So for the next 24 hours on our homepage, you’ll find an interactive, playable logo inspired by the instruments with which Moog brought musical performance into the electronic age. You can use your mouse or computer keyboard to control the mini-synthesizer’s keys and knobs to make nearly limitless sounds. Keeping with the theme of 1960s music technology, we’ve patched the keyboard into a 4-track tape recorder so you can record, play back and share songs via short links or Google+.
Check it out, have a little fun, and share it with others!