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sending analog signals using a toslink cable

post #1 of 3
Thread Starter 
Hi everyone,

So about a month back i asked a question on here about an audio mixer. I got it built and running a while back but have recently brought some extra 3.5mm jacks for my analog mixing board, this one takes in an input from my microphone which has an amplified analog output.

Ive noticed that because of the cable length required the cable is acting as an antenna and causing background noise. I have seen adapterd which allow 3.5mm jack to toslink cable.

So i was wondering if it was possible to use a 3.5mm jack to toslink adapter to send the analog signal down the toslink cable?

I dont want to convert it to digital, i was hoping to use the toslink cable to prevent the static being picked up by the length of cable.

So using it this way

Mic - 3.5mm to toslink adapter - toslink cable - 3.5mm to toslink adapter - audio mixer

I am unsure if this will work, as i am unsure if the adapters would convert the analog signal to the correct light flashes and then read them right the other end.

Sorry this isnt technical as it should be. So my question is, has anyone used these adapters? They are passive and cheap so their not converters

And if anyone has used them or understands them better then me, would this work?

Thanks,
Jamie
post #2 of 3

toslink is a digital signal...

 

I'm sorry, I would help if I could, but you would have to convert an analog signal to digital toslink output to toslink input to analog.

 

Maybe someone else on this forum can think of a better way, but you'll probably have to find some other way of lowering the noise floor

post #3 of 3
Thread Starter 
Yeh sorry, i had read of people using toslink cables to send signals for electrical projects other then audio but i forgot the way analog audio works.

Right now i have 2 1m cables connected from phone docks to the mixer circuit and the output of my dac goes into the mixer aswell. The cable from my mic (blue yeti) is the same as that used by my docks to the mixer however much longer

The mic is run power wise by a usb, and connection my headphones (beyerdynamic dt770 80ohms) to it provides no noise even with the very long cable, but connecting the 5m cable to my mixer gives me issues even with the mic muted so it outputs no sound.

I do need to replace the opamp used in my mixer soon for a good one as its a rubbish one compared to what i have used in my dac

I think i will move the mic closer to the mixer tomorrow and see if i get the issue on a shorter cable. I could probably get away with a 3m cable instead of 5m
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