The volume and compressor seem to work together and as mentioned they are notched in 1/2 steps ie vol 1, 1.5, 2, etc etc
The compressor works as a very good compressor and immediately adds a little volume boost and it seems if you crank the compressor to max you add a tiny bit of grit to the signal.
You can use it as an always on compressor or turn it on via a footswitch.
You could I guess use it as a boost but I’m not sure it was designed as that.
The notched volume can or could result in volume levels that are too high or too low as you can’t get less that 0.5 increase / decrease … however you can back off the compressor if the volume is too much or turn your bass volume down a little.
Just purchased the Pedal Baby Bag which also fits the LBT as a carry gig bag .. thank you Orange for advising me of that 👍