sw_lolast / sw_hilast
Like sw_last, but allowing a region to be triggered across a range
sw_lolast specifies the bottom of the range,
sw_hilast the high.
This is useful when there are multiple regions being triggered, and some of them are common across several keyswitches - for example, fretting noises triggered on note release on a guitar might be the same across both normal, hammer-on and slide articulations, but should not be triggered for harmonics.