Workbench HD will work with Monterey 12.4. if 1) use the Variax VDI USB interface 2) Variax battery has good charge 3) plug 1/4 inch into guitar to turn ON the variax
I can upload/download Variax presets.
Note however with my older music system High Sierra I can use the HX Edit to communicate to the Variax and use Workbench HD (through the Helix w/HX Edit) to upload/download/modify Variax presets. I can also switch presets on the Helix and see the changes occur in Workbench HD.
With Monterey if I Helix>HD Edit (NO VDI USB just Variax to Helix) and have Workbench HD open if I select Helix presets which have different Variax presets the Workbench HD does not show the correct Variax preset as defined by Helix. It seems like the tone/preset is correct but it does not display properly. Then If I select a Workbench HD Variax model it will randomly go to a different Helix preset and may or may not change the WHD Variax model --- so integration Helix<>HX Edit<>Workbench HD is Not working with Monterey.