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| Modifying audio console |
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| thisisliam:
Good afternoon! New to the boards and excited to be here. I've been experimenting with creating my own PCBs lately and am attempting to modify an existing piece of gear. I contacted the manufacturer and they informed me that what I want to do is possible with some diodes, but won't elaborate further. While I'm relatively familiar with how everything is connected I don't want to damage the unit. The unit itself is a four wire box - four XLR inputs, four XLR outputs, an XLR microphone input, a 1/4" headphone output and four switches that when actuated output the mic signal to that corresponding output. The inputs are monitored via an internal speaker which is cut when headphones are plugged in. The inputs are not routed to the outputs. Each of the four switches has an LED that illuminates when that channel is hot (switch is actuated). What I'm wanting to do is add a push button that will allow me to "all talk" to all four of the outputs rather than actuating all four switches at once. As mentioned above, the manufacturer said some diodes will achieve this, but that is all they're willing to tell me. If anyone interested is open to helping push me in the right direction I can post some photos of the board and unit on here. Thanks! |
| ogden:
--- Quote from: thisisliam on December 07, 2018, 08:43:53 pm ---What I'm wanting to do is add a push button that will allow me to "all talk" to all four of the outputs rather than actuating all four switches at once. As mentioned above, the manufacturer said some diodes will achieve this, but that is all they're willing to tell me. --- End quote --- They just don't want to waste too much resources on you, but if they say so then not that much effort is needed. Please tell make and model of console and don't omit this part of information in the future. Could you provide picture of controls, and some pictures of inside boards, especially those which are related to said buttons. In case console is digital one, and buttons does not route analog signals but just logical states/commands for DSP - you need to measure voltage (against ground) on all contacts of the button when it is pressed and when not. Better do it on at least two buttons to see - they work same way or not. |
| thisisliam:
--- Quote from: ogden on December 07, 2018, 09:42:29 pm ---They just don't want to waste too much resources on you, but if they say so then not that much effort is needed. Please tell make and model of console and don't omit this part of information in the future. Could you provide picture of controls, and some pictures of inside boards, especially those which are related to said buttons. In case console is digital one, and buttons does not route analog signals but just logical states/commands for DSP - you need to measure voltage (against ground) on all contacts of the button when it is pressed and when not. Better do it on at least two buttons to see - they work same way or not. --- End quote --- Totally understood. I did offer them payment for their time, but I understand. The unit is analog. I can provide photos once I'm home from work. The unit is the FW4010 by CTP Systems out of the UK. |
| ogden:
--- Quote from: thisisliam on December 07, 2018, 09:58:43 pm ---The unit is analog. I can provide photos once I'm home from work. The unit is the FW4010 by CTP Systems out of the UK. --- End quote --- This one? http://www.ctpsystems.co.uk/fourwire.html Is this kind of announcer system console for shopping malls or what? I noticed promising "key latch enable" option on back which most likely means that audio is not routed through switches and what manufacturer said about diodes, may indeed be true. Now we wait for some photo of internals and your probing results. |
| thisisliam:
That's the one. Indeed it has multiple purposes. This one I'm wanting to modify is for use in a control room on a reality TV show. The user can monitor the actors microphones and "speak" to various parts of the set. |
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