 Controller Interfaces are external inputs/outputs for CV/Trigger, VCF and VCO mod inputs, arpeggiator, portamento, and the pitch/MG1 mod wheels can be assigned to control VCO1 pitch, pitch or the filter.Bender goes to 2.5 octaves +/- for Pitch and full range for VCF cutoff.There are 5 different oscillator assignment modes