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Note names of musical notes keyboard piano frequencies = octave piano keys number tone tones 88 notes frequency names of all keys on a grand piano standard concert pitch tuning German English
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Amazon.com: Vangoa VGK610 Piano Keyboard, 61 Mini Keys Portable Music Keyboard for Beginners with Microphone, 3 Teaching Modes, 350 Tones, 350 Rhythms, 30 Demos, Pink : Musical Instruments
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