tabosc4 has a length constraint so this is probably better for samplers etc.
https://patchstorage.com/no-click-phasor-looping-w-tabread-pd-vanilla/

@willblackhurst If you look at the help file for [tabread4~] you will see that correct interpolation requires guard points added to the array so that interpolation is performed correctly as [phasor~] wraps around the end of the array.
Your patch doesn't glitch between the array copies, but it does as [phasor~] wraps at the end of the 3rd copy, or where you chop into the array adjusting the clip length percentage.
@lacuna made a handy patch to add guard points automatically.... https://forum.pdpatchrepo.info/topic/14301/add-delete-guard-points-of-an-array-for-4-point-interpolation-of-tabread4-ect
I suppose that if you want to adjust the playback length then you would need to copy a percentage of the array to a new array, and then add the guard points.
David.

oh the phasor thinks the period is only the middle copy length. and it starts at the middle copy. so it should go backwards as well.