H9s will only run one Time/Mod/PitchFactor or SPACE effect algorithm at a time. However, some effects algorithms do contain multiple effects like ModEchoVerb, Spring Reverb/Tremolo, etc. and complex modulated Delays that can create unique choruses, reverbs, and special effects. The H9 Resonator is a special delay with four independent taps that resonate at selected pitches with great control and variability. Check it out from the H9 Control store demo it is amazing.
