Why does Reaper not time stretch loops as good as Acid Pro 6 (Examples provided)

Actually, just noticed this option in Dynamic Split dialog. For both "Split selected items" modes, there's "Set new items forced to beat timebase" checkbox. This actually makes those items follow the tempo, similarly to how REX works. Of course, you need to slice the item properly first, and Dynamic Split can sometimes be good, but other times utterly useless, depending on the material.

Yo oh ello-- yea fl still exports wavs as acidized wavs.. it sets regions/markers just like rex does..but it can also set 'sustaining loops' >these markers were made for tempo locking functions.. points are moved to match tempos and i think its only when pitch gets altered that the stretch algor then goes to work. I dont think rex is much different other than using ph's own stretch algor. REAPER will read the markers as cue points which can be imported. Happiest new year.

Reaper already has Elastique Pro (both versions 2 and 3).

sorry my mistake! i just mean the examples provided by OP are night and day ! Reaper should be equal , whatever that is : )

Eventually it might happen...

You could post a feature request for Acid loop support, or bump one if it already exists.

Basically propellerheadsoftware cornered that market--theres a range of other ways this has been done over the years-tbh i think soundforge is the 1 of best sample editors still today.. A lot of soft and hardwares use this same ideaology--detecting tempos from transient markers system-- serato being a named dj tool eg.. Ive edited a lot of samples over the years and no automatic detection system is 100% flawless--the most accurate way still today is by manually inserting markers/cue regions..! its painfull,but results are more humanly accuarately placed currently. Markering audio accurately can have a lot of exellent audio side effects--because these cues can also be used for other types of edits for midi as well--grooves for eg: Even people speaking n a normal manner will produce certain patterns and grooves if studied. :D More options are always welcomed here<> so long they actually ''work well'' ! 1 thing to note with reaper currently is--if you place markers,render and include as media cues-- if your changing sample rates on convertion--the markers will sit on samples--so if you downsampling audio--your cues will not sync lock to a higher/lowerproject sample rate. Also-reaper is using 2 different sync interpolations on playback and renders-- this may affect 'what is being heard realtime' if set to lowest sync type on playbacks.k.

Aye-also-goto any audio properties(f2) and it usually shows a acid chunk- bpm tagged data from savings. Some think 64point sync is decent enough for quite heavy projects realtime--it does make a whole difference when using 96khz layered multitracking projects. New year-new things-new ways.