Tempo change on sample in keygroup mode.

Hi Guys

SO i have been wondering..

i cut this sample from an old track with a really cool synth arp.
i want to be able to play the arp up and down the scale a little bit for it to be more interesting in my track.
Now when i do this it also changes the tempo of the arp ( pitch obviously ) but i cant find the option anywhere to keep it warped to the original tempo.
Any thoughts on this ?
Thanks in advance
Oliver