Hi there. 
I have the STS 5000, and earlier with my ASR sampler 
I used a excel document to calculate a new tempo in percent. very easy 
I just added the tempo numbers in excel 
ex a 125 to 130 bpm 
and I had a number in PERCENT 
3.85%(in this case) workded super!! 
Then I stretched the sample with 3.85% 
BUT THIS DOSENT WORK ONT the STS 5000. 
I get the tempo changed But its not the tempo I thought it should be . I guess the STS 5000 have another way .i have also calculated the pitch first like in the manual. 
is there an easy way to do this right ?? 
/Michael