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  3. The satisfying thump of a bass drum sounds every time Gil Weinberg strikes thin air with his iPhone.A pal nearby swings his Noki

The satisfying thump of a bass drum sounds every time Gil Weinberg strikes thin air with his iPhone.A pal nearby swings his Noki

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问题     The satisfying thump of a bass drum sounds every time Gil Weinberg strikes thin air with his iPhone.A pal nearby swings his Nokia smartphone back and forth, adding a rippling bass line.A third phone-waving friend sprinkles piano and guitar phrases on top.
    Weinberg’s trios are using software that turns ordinary cellphones into musicalinstruments. "People can play on their own, but we are more excited about them jamming like a band," says Weinberg, a music technologist at the Georgia Institute of Technology in Atlanta Commuters regularly bombarded with tinny recorded music played on other passengers’ phones might not share his enthusiasm, but air guitarists and would-be drummers will probably be delighted. Weinberg claims his smart gesture-recognition software will democratize music-making as never before. "With the right tools, everyone can be creative and expressive musically—even if they don’t know anything about music theory," he says.
    The software, dubbed ZoozBeats and launched this week, monitors a phone’s motion and plays a corresponding sound. For example, you might play a rhythm based on a snare drum by beating the air with the phone as if it’s a drumstick. Or you could strum with it to play a sequence of guitar chords. The software runs on a wide range of phones because it uses many different ways to sense gestures. The obvious way is to use the accelerometers built into small devices like the Apple iPhone and Nokia N96 smartphone. But ZoozBeats can also trigger sounds when the view through a phone’s camera lens changes rapidly, or generate a beat or bass line from simple taps on the mobile’s microphone.
    Of course, people who aren’t well skillful in music-making are more likely to make unpleasant noises than beautiful melodies, so ZoozBeats incorporates a system called Musical Wizard to make sure their musical decisions are harmonious. It won’t do everything, though. The system has been built to ensure that practice still makes perfect:  "The big challenge was not to make it sound OK whatever you do," says Weinberg. "It will fit, but not perfectly, so you can still learn to improve the music yourself."
    ZoozBeats comes with instruments for three types of music: rock, techno (a form of modern electronic music with a very fast beat) and hip hop. It also allows users to produce vocal effects by singing into the phone and will be downloadable in two versions. One of these will be for solo use, the other a Bluetooth networkable version that supports jamming by groups of people—using the Musical Wizard to keep everybody’s input melodious.
What can be inferred about Musical Wizard according to Paragraph 4?
选项 A、It is used to help people to make all the musical decisions perfectly.
B、It helps people make harmonious melodies.
C、It gives a big challenge to make it sound OK
D、It prevents the music lover from learning to improve the music themselves.
答案B
解析 推理判断题。第四段提出“音乐天才”系统可以确保人们都能演奏出和谐的音乐，故B项与之相符。
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