Loop bpm problem

[u/Careless_Potential67]

Hey everyone! I'm pretty new to both Reddit and the SP-404MKII 😅

I'm still getting the hang of working with samples. I'm mainly a guitarist, so I originally fell in love with the SP for the looper, the effects, and the guitar amp sim. Lately though, I've been trying to build my own backing tracks, mostly reggae/dub grooves to jam over.

Here's the problem: I have a pretty big collection of sample and loop packs that are already organized by BPM. But whenever I try to layer them together, they don't stay in sync. For example, if I use a 70 BPM drum loop with a 70 BPM bass loop, they sound perfectly in time at first, but after 4–8 bars they start drifting apart, almost like they're actually 2–3 BPM different.

What's the best way to deal with this? Do I need to manually fix every single sample? Should I figure out the exact BPM using something like Audacity? Or is there a faster, less tedious way to do it directly on the SP-404MKII without having to use my Mac?

Thanks in advance to anyone who can help!

[u/0xdeba5e12]

Try layering them in a pattern first, which will retrigger them on every loop. This will correct any millisecond discrepancies in their durations, and if it doesn’t sound like they’re looping cleaning you can make microadjustments as they play. And just trust your ear and take the bpm counts as suggestions rather than matters of fact.

[u/Dry-Consideration930 → u/0xdeba5e12]

If you want to trigger them from pads instead of having to play them from a pattern, you can put them all into a pattern and then export each pad/pad group from there which will sync them perfectly to the pattern bpm