Hi Bill,
Gather the drums are the only audio part, not that familiar with audio styles.
If you have a non audio style who’s drums might work with your 50s style, maybe you could copy the rest of the 50’s style parts to the regular style and use the regular styles drums.
Ie mix n match from 2 different styles.
That should save to USB, it did on my s950.
Definitely not ideal, but maybe better than nothing.
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best wishes
Rikki 🧸
Korg PA5X 88 note
SX900
Band in a Box 2022