The default for receiving MIDI messages via the MIDI In is channel 1. 
The MIDI channel can be changed using Blackstar’s Architect software.
				
CC Values
Type        Function                 CC#  Value
Voice       USA                      1    127 = On
            UK                       2    127 = On
            Flat                     3    127 = On
		  
Preamp      Bass                     4    0-127
            Middle                   5    0-127
            Treble                   6    0-127
            Gain                     7    0-127

Response    EL84                     8    127 = On
            EL34                     10   127 = On
            6L6                      12   127 = On

            Master Volume            16   0-127

Response    KT88                     18   127 = On
            6V6                      20   127 = On
            LINEAR                   22   127 = On

FX Loop     FX Loop Pre              75   127 = On
            FX Loop Post             76   127 = On
            FX Loop Series           77   127 = On
            FX Loop Parallel         78   127 = On

Reverb      Reverb Footswitch        86   0 = Off, 127 = On
            Reverb Level             91   0-127
            Reverb Hold              92   0 = Off, 127 = On
            Preset Footswitch        99   0 = Off, 127 = On

Power Level 1W                       110  127 = On
            20W                      111  127 = On
            100W                     112  127 = On