Hi,
I have a Marshall AVT150 amp that I'd like to be able to change channels with MIDI.
I think the TT MIDI switcher would be ideal for that, but I'd like a bit more information first.
So the amp has 4 channels that you control with a momentary switch of the footswitch.
The footswitch also has 2 latching switches to enable/disable the digital FX of the amp on channels 1/2 or 3/4 respectively.
So the TT MID switcher seems a good match: use A1-A4 for the channels and A5 and A6 for the DFX.
The problem is that the channel switching is done by momentary switches, while the TT MIDI switcher seems to have a permanent contact on the selected channel, right? Is there a way around that?
It also looks like I can't connect the outputs directly to my amp, but I'll need relays or optocouplers: maybe it can be fixed there?
Or would it not be a problem at all if you would 'keep pushing the channel button'? The amp switches directly as soon as you hit the button and nothing bad seems to happen if I keep it pressed...
The only problem I could see with it is that there are also buttons on the front panel of the amp I sometimes use for switching channels, and maybe they won't work anymore then? Unless they would also sent out via the footswitch cable... Maybe i should check that...
Another question is about power: judging from the schematic of my amp, there should be a 5V lead to the footswitch (didn't do any measurements yet): could I possibly use this to power the board? I know it expects 6.3V or up on the main power supply, but that is converted to 5V, so could I power it from the back-side of the power supply with 5V, or is that too risky? It would allow me to integrate the TT MIDI switcher into the footswitch itself with less hassle.
Any help or ideas appreciated!