[quote name='dood' post='53776' date='Sep 1 2007, 12:09 PM']Ok, I have only skim read your post so apologies for the short reply. My first thoughts are that this box will require the necessary program change MIDI messages in order to switch each of it's 4 relays. So, if you are changing every relay at the touch of one button, that controller will have to be able to send those 4 messages at the same time. (rememember you'll have 8 for 4 relays - 4 x on messages and 4 x off messages)
I am not aware of any resonably priced MIDI foor controllers that can send any more than one program change message at the same time. There are many that can send multiple CC (constant control) messages but that would still require some sort of environment change, like pushing on a button/controller - these are mostly used for volume and wah pedal type controllers.
It maybe easier to get someone with electronic skills to rig up a custom A/B/C mute switch box and stay away from MIDI in this case. It will probably work out cheaper too! - I think with a little bit of design you could come up with a useable option.
I would use a selection of DPDT footswitches and work out which preamps you want to switch between. I'd be happy to help if I can, with the design.
So... how do you want to mute? do you want to be able to switch between 2 preamps? turn one on when another is off? Or have a 'totally mute' control for tuning?[/quote]
thanks for the reply!
Sorry, this is a hypothetical situation! I love the sound of the distortion on the AG500, so I was thinking of getting 2 Agro's when they are released in the US, which isn't long, and placing them in the effects loop of the DB750. One for a mild distortion/growl and one for full on dist. As far as I know Agro's are engaged and disengaged by a latching footswitch.
Which in total means I have three latching footswitches, one for my DB750 and two for the agro's. So all i'd need is to:
1)mute and unmute my DB750, by muting it everything will be muted and I can tune.
2)Switch between the 1st and 2nd agro. Ideally automatically disengaging one when I engage the other.
Being able to control these units simply and easily will affect whether I buy them or not. If it involves three footwitches and 3 cables then Ill just stick to my current pedal board set up - wireless mounted on the board, so only one cable needed from board to amp.
Thanks, really appreciate the support!
ed