So, if you look at the manual, it says you can via MIDI. You can find that here: https://pae-web.presonusmusic.com/downloads/products/pdf/Quantum_2626_Owners_Manual_V2_EN_08022022.pdf at section 3.3. However, after reaching out to support, they said that the manual was incorrect and that you could only manually change the preamp levels with the knobbs.