Hey everyone...
Could someone help me figure out what I'm doing wrong here?
This is a box I built for communications between the engineer and the talent for a radio show.
The goal was to have the program audio in the headphones at all times. When the engineer presses a button, the program dims and the engineers voice (out of the mic pre) gets inserted into the headphones.
The ring on the output comes from a modified Rolls PS16. The outputs feed Rolls PM50 headphone amps, and the ring carries 12VDC to power the amps over the TRS, carrying the audio signal on the tip. Ordinarily, the PS16 has a single input and sends that out, with power, to all 4 outputs. Since I needed each output to get it's own feed, I modified it so that it only is contributing the power, allowing the rest of the circuit to focus on the audio signals.
That part works (though I have to go back and adjust the resistors because the level is too low when the button is pressed). However, the problem I'm having is that when you press button 1 to talk to Person A, Person B can hear the engineer faintly. The program level won't dim obviously, but I don't like the fact that the engineer's voice isn't discreet as it should be.
How can I fix this? Is there a better circuit that does the same thing but more reliably?
Thanks!
Could someone help me figure out what I'm doing wrong here?
This is a box I built for communications between the engineer and the talent for a radio show.
The goal was to have the program audio in the headphones at all times. When the engineer presses a button, the program dims and the engineers voice (out of the mic pre) gets inserted into the headphones.
The ring on the output comes from a modified Rolls PS16. The outputs feed Rolls PM50 headphone amps, and the ring carries 12VDC to power the amps over the TRS, carrying the audio signal on the tip. Ordinarily, the PS16 has a single input and sends that out, with power, to all 4 outputs. Since I needed each output to get it's own feed, I modified it so that it only is contributing the power, allowing the rest of the circuit to focus on the audio signals.
That part works (though I have to go back and adjust the resistors because the level is too low when the button is pressed). However, the problem I'm having is that when you press button 1 to talk to Person A, Person B can hear the engineer faintly. The program level won't dim obviously, but I don't like the fact that the engineer's voice isn't discreet as it should be.
How can I fix this? Is there a better circuit that does the same thing but more reliably?
Thanks!
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