I sell the Genesis keyboards. Most of my customers are not using the sampling part. Yes, you can sample right in the keyboard and I beleive when i asked Chris Anthony, who does a lot of programming for Generalmusic the question you ask regarding syncing the sample with the style, I was told this would have to be done in a computer software program and adjusted within the program to sync with a new tempo. I am not positive about this, but I think this is what Chris told me. Perhaps Paul, who works for Generalmusic will be able to shed some additional information regarding sampling.
George Kaye
Kaye's Music Scene
Reseda, California
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)