Figured I might just do it right away…
H9 's looper algo sums stereo inputs to mono.
MIDI sync/quantization seems good (only tested shortly). It starts rec on the next beat after pressing the button. Playback is tight on beat. Does overdubs.
Changing tempo while loop is playing doesn’t stretch or pitch the loop. Keeps playing at same tempo and restarts when out of sync new bar starts. Not advisable unless you’re into glitch.
Recording memory of 12 secs at full quality is short, but I guess long enough for techno transitions. Though even then there’s a clear loss of high frequency signal content.
I might use it in a pinch but will stay with Ableton for now.