Complete demonstration of Yamaha PSR-S710 or 910 keyboard by Willhen

Hi, My friend has bought a new Yamaha PSR-S710 keyboard and we would like to explore the whole keyboard as soon as possible. We tried all forums, but nothing helps. We just want to know how to make use of all the options in the keyboard and learn so that we can use it efficiently… (Budget: $2-$8 USD, Jobs: Audio Services, Electronics, Engineering, Music, Voice Talent)

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