You could possibly try my Pattern Resizer tool: New Tool (2.8, 3.0): Flexible Pattern Resizer
Let’s say you’ve recorded your jam live, and you record 4 bars of notes or beats or whatever, except that your 4 bar sequence ends up being a weird length in Renoise like 57 pattern lines.
What you could do is change the actual pattern length in Renoise to 57 lines so that it fits your content and loops correctly, then use my tool to physically resize your pattern data up to a more common length like 64 lines. This will cut out a lot of the manual work you’d have to do, leaving you to just fine-tune things instead.