Re: Making three-way audio switch

On Thu, 12 Jan 2006 10:24:03 -0500, "Zed Rafi" <dg@xxxxxx> wrote:

>Hello all,
>
>This is my first post in this group.
>
>I want to make an audio input switch for my stero system at home.
>
>My sound system only has a single AUX input, although I've got a number of
>devices that i want selectively amplified through my sound system. I'm
>currently unplugging/replugging RCA wires, and i'm getting tired of it.
>
>I was originally planning on simply buying 3 pairs of RCA connectors
>(input1, input2, output) and connecting them to a three-way (on-off-on)
>switch which could connect the output selectively to input1 or input2
>depeding on its position.
>
>But i am wondering how difficult it would be to make a small circuit capable
>of detecting current in both inputs and just outputting whatever input has a
>non-zero value, without losing any quality in the audio signal.
>
>If both inputs have a non-zero value, it would just light up a LED to
>notify me that both inputs are receiving signals at the same time, and that
>i need to shut one of them off.
>
>Any thoughts or links to web pages? I'm pretty new to designing my own elec
>circuits. I know what most electronic components do, but don't known how to
>select them and how to arrange them to make what i want.
>
>thanks for your help
>
>

What you ask is "sorta" possible, but the devil is in the details.
Building the basic device to switch lines based upon some detected
level is not the problem. The problems come when you consider
that you will need to have some switch threshold, so you don't
trigger on random noise. But invariably there will be program
material that goes below this threshold, even just momentarily.
So then you have to start messing with various delays. I'd rate
the odds of getting a satisfactory system as pretty low, not worth
the effort.

Best regards,


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator
.

Relevant Pages

  • Re: Audio switch
    ... >> This is my first post in this group. ... >> I want to make an audio input switch for my stero system at home. ... >> devices that i want selectively amplified through my sound system. ...
    (sci.electronics.design)
  • Re: Audio switch
    ... > This is my first post in this group. ... > I want to make an audio input switch for my stero system at home. ... So you need a time constant in there, ...
    (sci.electronics.design)
  • Re: Hum from Tube Distortion Pedal into clean amp
    ... by turning the B switch OFF, but not entirely or nearly enough (e.g. ... and one amp. ... ideas for using it to blend different signals with effects. ... After reading reviews on the different passive splitters and the ...
    (alt.guitar.amps)
  • Re: how do threads work?
    ... >> kernel for a little help, in the form of regular timer signals. ... it is signals. ... The kernel doesn't care if you switch stack causing such ... one CPU bound thrad and one I/O bound thread. ...
    (comp.os.linux.development.system)
  • Re: Analog switch configuration
    ... If I disconnect the inverting opamp and just directly connect the NO ... This still leaves the problem that pispaspos is switching a signal ... which means that all the switched signals must be no more than ... o/p switch just switches between the input and the inverted ...
    (sci.electronics.design)