hi to all.
I never asked because I think it’s impossible do it, but I try the same to ask. 
I didn’t find any option in renoise (I’m still using the 1.52).
Is it possible make an automation on the loop, I mean automize the start and the end of the wav.
In the sample editor change the start/end while is playing.
you can do a similar effect with an old freeware plugin called “dx bufferize” but is not really the same.
if somebody understand what I mean please say me if there is an option or if can be possible have it on the next release on renoise 
thanks in advance