I think I get what you’re after - the problem you’re having is, if you autoseek a sample, and start messing with pitch, it messes up the speed of playback, yea? (and you really want each individual slice element to get pitched up/down/what have you at your command).
Another thing to try might be dBLue’s amazing amazing (AMAZING) tool, copy slices to pattern: https://forum.renoise.com/t/new-tool-2-7-2-8-slices-to-pattern/31593
That way, you could take your sample, slice it up, and automatically lay out all the slices in the pattern editor. Then, messing w/ pitch via macros doesn’t affect the speed of the overall sample playback, but you (essentially) get a sort of auto-seek function (because you can start playback wherever you want and you’ll still hear the sample).
Again, might have totally misunderstood, if so, ignore!
Thanks for mentioning that tool, I’ll check that out, it’ll probably be alot quicker to use for some applications. I just wish you could autoseek with the pitch macro as you can with the pitch glide command 