If you are using the four style OTS settings, then you can configure the Harmony of each of separately as part of each OTS. You can choose to have the Harmony apply to R1, R2, or both. Then, utilizing your foot pedal, the Harmony will be activated according to the setup you made in the OTS. I do wish Yamaha would make a global setting for Harmony. That would be nice.
Tom G.
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Tyros 4