Sample playback issue with stretch
I might be doing something wrong but I'm not sure. I have a few different sample packs with melodic content in them in various keys. Black octopus and other things I've picked up off loopmasters. I've noticed that the deluge stretch mode creates noise artifacts in the sample even if it's at the same tempo with the key unaltered. So for instance I have a deep house piano loop at 120 bpm in A minor. I load it into a fresh kit. The default bpm on the deluge is 120 but I double checked to be sure. If I leave the sample playback mode to "cut" and play the sample it remains unaltered. Plays nice and smooth and it's in time. If I put it to stretch mode however all kinds of strange audio artifacts start showing up even though the bpm is still the original bpm( I imagine it has something to do with the time stretching algorithm similar to the way Ableton has different time stretching modes). Then you change the tempo or the pitch and of course it gets worse. Seems to be not as pronounced with drum loops but it's still noticeable.
So I guess I have two questions.
1) Is the situation I mentioned normal?
2) Is there a good way to work with melodic samples if you end up wanting to pitch a looped sample up or down to get it in key/tempo without the audio sounding really garbled?