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Casiotone MT-640 (Demo music - 1988 - NEC D938g soundchip) Duke Ellington - "Take the A Train" - YouTube
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Adattatore Alimentatore DC 9V per Casio MT-640, MT-820, PRO-100 Pianoforte a Tastiera 5055329377529 | eBay
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Casio's MT-100 toy keyboard is reborn as a free plug-in for macOS and Windows - CDM Create Digital Music
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