I chose a specific cello sample from a cello soundfont. I just right-clicked on one of the mountains that came well before release time, roughly setting the right border of the section to be looped and ran Toolbox / Auto loop. Then the closest zero-crossing was found, I guess, for the right border (look at the "after" sample size being slightly above the "before" selected right sample) and a suitable left border was automatically found, so that the resulting loop is nice and click-free. My autocorrelation-fu is weak but I hope the above will hit home for you. :)
Due to lack of research, documentation, or experimentation from my part, I thought the above was not always working. Anyway, the case has now been presented. :)
Tuned I am and will be, for sure. And 0.9.9 reads as a really exciting version number. I am afraid I will be creating another itch, though.
My wording was a bit poor, I guess, but thankfully GPL-3.0 https://github.com/davy7125/polyphone puts it articulately into C++ and calls it auto loop ( https://github.com/davy7125/polyphone/blob/master/sources/editor/tools/… / https://github.com/davy7125/polyphone/blob/master/sources/core/sample/s… )
Maybe it is just a paradigm shift where the mountains and the valleys are like beats or maybe it is just the time for a before-after screenshot.
https://ibb.co/WPH1SM0
I chose a specific cello sample from a cello soundfont. I just right-clicked on one of the mountains that came well before release time, roughly setting the right border of the section to be looped and ran Toolbox / Auto loop. Then the closest zero-crossing was found, I guess, for the right border (look at the "after" sample size being slightly above the "before" selected right sample) and a suitable left border was automatically found, so that the resulting loop is nice and click-free. My autocorrelation-fu is weak but I hope the above will hit home for you. :)
Due to lack of research, documentation, or experimentation from my part, I thought the above was not always working. Anyway, the case has now been presented. :)