"Look, I'm not criticizing for the sake of it... "
Diki, I realize your not criticizing for the sake of it.. I have no problem with your uncertainty.
But I thought I would give you an idea of how the SD1/SD1plus works..
With the SD1 or SD1plus, you incorporate audio loops within a style by naming the audio loop the same name as the style
( ofcoarse the length of the loop needs to match tempo) which in turn streams the audio loop from the harddrive, while the style plays.
Keep in mind, the audio loop works only if the loop does not need to recognize chord changes ( drums) .. And the loop will adjust to tempo change, as long as it style sounds musically correct.
You are right in knowing that it is hard to incorporate audio loops and most owners of the SD1/SD1plus do not know how to do it.
Of the 307 Styles on the SD1 , 198 of the styles were born on the X1 and carried over to the SD1( all midi generate styles).
So, we'll see ....