Be aware you can't use upper bank patches for harmony.
For example, with the Ketron SD2 module, you can make your harmonies only with the basic GM bank. But, many interesting patches are set in the upper banks. So, you won't access them !
I know, it is a pity.
A request has been done some years ago in the wishlist to access the upper banks in the Melody/Thru harmonies. Still no implementation. That would be a very musical and useful feature. We have many patches (384 on Ketron SD2, 512 patches on Ketron SD1000) and we can only use the 128 first ones.

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