help designing a circuit

[holmsy]

what i need is sort of a muting circuit

i need a cicuit that has two audio inputs(we'll call them 1 and 2) and
the circuit alows input2 to play continuously untill there is a signal
from input1 then input2 will be muted while there is a signal coming
from input1 and then once there is no more signal from input1 it will
wait for around a minute before it alows sound from input2 again.

sort of so that you can listen to input2 but as soon as something
comes from input1 it has priority so that you cant miss it.

has anyone seen anything like this? does anyone know where i can get a
circuit diagram for something like that? does anyone have a circuit
diagram like that?

 

[BobG]

sort of so that you can listen to input2 but as soon as something
comes from input1 it has priority so that you cant miss it.
===================================================

Commercial intercoms have this.... zone paging, priority override....
You want to build it or buy it? A simple voice operated relay might
work.

 

[Active8]

On 31 Mar 2005 17:37:38 -0800, holmsy wrote:

what i need is sort of a muting circuit

i need a cicuit that has two audio inputs(we'll call them 1 and 2) and
the circuit alows input2 to play continuously untill there is a signal
from input1 then input2 will be muted while there is a signal coming
from input1 and then once there is no more signal from input1 it will
wait for around a minute before it alows sound from input2 again.

sort of so that you can listen to input2 but as soon as something
comes from input1 it has priority so that you cant miss it.

has anyone seen anything like this? does anyone know where i can get a
circuit diagram for something like that? does anyone have a circuit
diagram like that?

Those other guys have good ideas. Bob M touched on what I was
thinking which is just a plain mixer - if you really don't need that
mute/delay effect. When I was stationed in Germany, rather than
annoy people with loud music, I'd mic my acoustic guitar, run the
electric to the mixer, and there was another omni mic set up to pick
up people speaking. The tape deck ran into the mixer also. We
listend with headphones and heard it all.

So if you need an envelope detector to control a mute circuit, that
sounds easy. The mute/delay would work similar to an AGC circuit.

What's the application? You need Hi-Fi or what? What are the audio
sources and powering requirements?
--
Best Regards,
Mike