Did you try cutting that bit of waveform out in a regular editor in, for example in Cubase or Wavelab, prior to loading it into HALion? That’s what I would do with long files from which I only need a small bit…
I only dragged the sample from Cubase into Halion. Then defined the loop positions.
The thing is, how do you know where to cut, if you don’t have defined you loops? I think the normal way of doing this is to first set the loop markers and than cut away everything that is not needed.
I wonder why such a simple thing like cutting samples is not included in Halion. Every hardware sample has such a feature.