1 pattern may suffice…
Destructive looping with Octatrack - #45 by sezare56
2 recorders can be also alternated, finishing recordings and stop, so that recordings can be mangled freely.
Example :
Recorder 1 records 8 steps from step 1
Track 1 plays rec 1 from step 9
Recorder 2 records 8 steps from step 9
Track 1 plays rec 2 from step 1
(use a sample lock)
Recorders can be alterned more oftenly, so that mangling delay is shortened…