Hd500/x *full* Internal Midi Implementation Table (fx Params, Etc) in POD HD Posted December 19, 2013 I am sure you cannot access those parameters directly. The manual says:"This Appendix covers the MIDI features available for your PODÂ® HD500 device. POD HD500 will respond to incoming MIDI messages for remote access of its assignable Footswitch & Pedal Controllers, and for loading Banks & Presets. POD HD500 also outputs Bank & Program Change messages when navigating Set Lists and Presets. POD HD500 additionally includes the ability to function as MIDI Controller device, with its footswitches and Expression Pedals capable of sending customized MIDI commands."