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| 3 variable backlight color: bright red, the sound is low; Green light, intonation; Orange light, pitch. |
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| Double color LCD backlight. The school intonation, screen color is green; Sound check
Maybe, the screen color to red |
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| 3 variable backlight color: bright red, the sound is low; Green light, intonation; Orange light, pitch. |
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| Sound check accurate, the screen is green; Sound check is not accurate, the screen in red. |
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| Double color backlight. Green - sound check accurate; White - the school did not tune. |
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| Double color backlight: red, maybe sound check; Green, accurate sound check |
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