hi Irene,
Here's a short description of how to customize OTS voices for particular style:
Select one built-in style you like (let's say, it's "FinalWaltz"). You can play it, but don't make any changes yet. Now press Function button and then use Tab button to get Menu 2 on screen. There you choose Style Creator and once you're in it, choose Save option. Now keyboard will select User memory as saving destination and "FinalWaltz" as a style name. Here you can rename style to your liking, i.e to "FinalWaltz-2". Finally, you confirm saving.
That was the hardest part. That's necessary to be done, because you can't save changes into built-in styles. Once style is in User memory, it becomes "your" custom style. After you save the style, it is automatically selected as current style in use. At this point, it will still sound exactly the same as built-in style.
Now select voices you wish to be used for R1 and/or R2 and/or L. Once you're happy with the voices and you also adjusted other voice settings (in Mixer), your choice is ready to be saved into OTS.
Before continuing: while choosing voices, make sure that OTS LINK button is turned off -otherwise, your choices will be lost as soon you press one of the variations buttons.
For saving your voices into OTS, press MEMORY button. But after that instead of pressing one of registrations buttons, press one of four OTS buttons. There are four OTS buttons; one for each style variation. Usually we use OTS1 for MAIN A, OTS2 for MAIN B, etc.
As soon you press desired OTS button, you will be asked where to save your voice settings. In this case, keyboard will suggest "FinalWaltz-2" style. Now you confirm the saving.
That's it. Every time you load "FinalWaltz-2" style, it will already contain your customized OTS voices. You can also save that style on USB (for archive purpose) and when you load it next time, it will still contain your OTS voice settings.
If you wish OTS voices to be automatically changed along with variations, then make sure OTS LINK button is turned on.
I hope that was of some help,
Bogdan