In article <
tinward...@diybanter.com>, tinward <tinward.9adf188@diy
banter.com> scribeth thus
>
>I'm designing a radio studio, and to prevent feedback, I need the studio
>monitors to automatically mute themselves when the microphone faders
>start to go up. It would be nice not to have to do it manually
>everytime.
>
>I also can't have some DIY job with wires and microswitches! Is there
>some kind of unit i can buy which does the job?
>
Wrote most of that before I noticed that you can't have some DIY job!..
It seems to me that you have a more conventional sound recording mixer
i.e. one not designed for radio broadcast applications. If that is the
case I don't know of any external unit that does this.
You need to have some indication that the Mic fader is up and off its
end stop.
You can also use that switching signal for such things as "Mic Live"
lights, necessary in radio broadcast.
Is this because you aren't allowed to modify the equipment or are unsure
of how to do this?..
***************************************************************
On most all desks there is a switch on the Microphone fader that when it
comes off the end stop it then can operate a switching relay to do just
that.
Most decent fader ranges do this such as Penny and Giles and some Alps
ones have that as a fitment.
On some desks such as the Sonifex S2 series they use Voltage controlled
amplifier/s for gain reduction and in those there is a control voltage
usually from 0 to 5 Volts.
You could make up a detector and comparator circuit the one the voltage
from the slider of the fader, consider it like a conventional volume
control, comes of the 0 volts rest point your switching comparator
detects this and does the necessary..
One some desks you might also find Overpress switches these are the
other way around when you pull the fader towards you to switch a PFL
circuit to give you a quick check of what's on that channel before
fading it up..
--
Tony Sayer