jeffe
2
If the sounds are too short to notice the slide, then nothing you do is going to make them sound like they are sliding, right? Or am I misunderstanding you?
You can do it with an LFO if you set the LFO to the paramater you want to slide and then set the speed of the lfo to match the time you want.
You could also do it with a ctrl 8p by using slides on that track, instead of the sound track.