Piano Guidance
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What instrument do you not touch?

A theremin-like instrument sometimes called the electro-theremin is used for one of the signature parts of "Good Vibrations" by The Beach Boys. And it's a musical staple of science fiction movies. The theremin is unique because of how it's played: you make music without touching it.

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Is Fur Elise a sonata or symphony?
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Even if you're not familiar with the musical instrument called the theremin, chances are you've heard its ghostly sound. It's featured in "Whole Lotta Love" by Led Zeppelin, as well as some of the band's other songs. A theremin-like instrument sometimes called the electro-theremin is used for one of the signature parts of "Good Vibrations" by The Beach Boys. And it’s a musical staple of science fiction movies. The theremin is unique because of how it's played: you make music without touching it. How that's done will be demonstrated this Saturday at Porter Square Books in Cambridge by Somerville theremin player Jon Bernhardt. He'll be appearing with Montreal writer Sean Michaels, who has a new novel out, "Us Conductors," about the inventor of the theremin. Bernhardt came to WBUR's studios this week and played his theremin during a conversation with All Things Considered host Sacha Pfeiffer. He described the instrument this way: "Typically it's a box of some sort with two antennae that come out of either side. One antenna controls the pitch and the other antenna controls the volume, and as you move your hands closer and farther away from the two antennae you control the sound of the instrument." Playing a theremin is "very difficult," Bernhardt added, because the instrument is "very sensitive to your body movement. You could wiggle your pinky and the pitch could change by a major third. You could go from an open fist to a closed fist and you could be changing the pitch by an octave." For physics nerds, here's Bernhardt explanation of the science behind the theremin: "Basically, your body is acting as a plate and a capacitor, so your body is sort of ground in a capacitor, and as you move your hand away from or closer to the antenna you're changing the capacitance, which in turn affects an inductor, which in turn affects an oscillator, and that controls the pitch." "On more than one occasion when I've played the theremin," Bernhardt added, "people don't believe that it's the instrument. They think I'm humming secretly!"

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