Poly octave and pitch 'range' control

built in range control on pitch stuff, so you can have low octave on only the low notes but it won’t do a low octave on high register notes, depending on where you set the range control

so, automation of the pitch parameter in the detuner, probably assignable to an expression pedal?

no, range control is a variable resonant low pass in front of the processing, above the hard cutoff point the wet receives no signal to apply an octave to. See boss OC-5 ‘range’ or OD-20 ‘low octave’. It allows counterpoint lines of extreme interval distance, with low strings producing low octaves in simultaneous conjunction with high strings not producing low octaves, a normal 6 string can then do intervals otherwise possible only on a 7 or 8 string