Hi Indigo333,
the maximum sample length >bar-wise< is 32. However you need to apply a little trick to allow for such long samples:
- first, set the scale to 4:4
- then add your sample to a step
- hold down that step an set TRC (trig conditions) inside the Trig menu to 1:8
- voilà: your sample will only be triggered every 32 bars