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YAMAHA YC61 NEW OS VERSION 1.3 - NEW SOUNDS
Yamaha | YC OS v1.3 | Sound Demo
Yamaha | YC OS v1.4 | Sound Demo
NEW Yamaha YC88 Firmware Update 1.30
Yamaha YC88 - Updating to Version 1.30 - Sound Demos
How To Update The Yamaha YC61 | Firmware Version 1.30
Tech Talk: YC OS v1.3
NEW Yamaha YC88 firmware update 1.40 Step by Step
Yamaha YC-61, 73, 88 AMAZING new organ, FX, FM Synthesis and more. Firmware 1.20
This Feature Will Keep Me From Buying Keyboards...
Yamaha YC61 Honest Review & Sound Demos. Still Worth it?
Yamaha | YC OS v1.2 | Sound Demo
