Yes. I guess more than one owner of the Duo actually does that.
No tone sucking at all. Both inputs and outputs are totally independent and have full adjustments of the analog pre/post amps. Inputs have 3 different preamps plus a -12/+12dB fine gain adjust. The outputs go from -120/+5dB and are balanced.
The official collection has the CAPS Gate, which I find already to be a very decent option. The community shall have a more unbiased answer on this one
In the queue to be published we have:
abGate - probably the community's most famous one
Calf Gate and it's Sidechain and Muliband variations
Not sure here, but very likely yes.
Which messages does the 5150 interprets for channel changing? how many channels there are?
Did not get your question here. Sorry. We don't have a channel switch. What we do is to change the loaded pedalboard using MIDI controls. There is a small loading time (about 0.5sec) for the pedalboard change.
There is also the possibility of using internal routing plugins - like an A/B switchbox - to route the audio in two or more internal "channels" of the pedalboard. This change is latency free.
We have engineered the Duo for a long lifecycle. The CPU inside is connected using a slot in a way that we can offer future hardware upgrades to increase the computing power without the need to change the device.
You can choose the channel that you use to change pedalboards and you can also filter the channels that you want to send out to the amp.
Hope this helps with in your decision