I use the H9000 Rack with a SwitchBlade GL and all is good. However, the Switchblade can only handle two MIDI expression pedals, which I use for master volume and preset morphing volume (smoothly switch from one amp to another continuously). I use two more expression pedals directly plugged into the H9000, and I’d like to use one of them to control the master volume of one of the 4 FX chains. Currently, all I can do is map the Input and output gain levels, which combined, cover a range of -48db to +48db, but I would much prefer to leave those as is for conventional gain matching at 0dB, and have an independent output Master level volume control that could be mapped to -Inf / 0dB and act as a conventional volume control? Although -48dB is a lot of reduction, it still leaves a tiny bit of sound through. My use case would be to control the volume of a reverb in parallel in my signal chain, and have the ability to set its volume to as low as zero via expression pedal.
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