ADC to DAC

[geraldwoollard]

I wish to connect adc directly to dac so that I can transmit audio as digital pulse's , I thus bought these [Analog RCA L/R Audio Converter Adapter to Digital Optical Coaxial Toslink] AND [Digital Optical Coaxial Toslink Signal to Analog Audio Converter Adapter RCA FT] from Ebay, these have the same sample rates and only audio and digital inputs & outputs so I thought a simple job of connecting digital output of one to digital input of the other and I should be able to send audio from one unit to the other but it don't work WHY NOT ???
OK I will eventually use the coaxial connection ,but firstly I'm using Toslink digital I/O, and yes I can see the red glow from the Toslink output of the ADC, the cable is about a meter long ,when I connect the Toslink I just get a high pitch digital signal, many thanks – Gerald Woollard

 

[The_Lhc]

So you want to take an analogue signal, convert it to digital and then convert it straight back to digital? That doesn't make an awful lot of sense.

 

[geraldwoollard]

HI the idea is to transmit the digtal pulse as this transmit much further and easer ,so the tx has the adc and the rx has the dac,

many thanks for the interest ....Gerald

 

[The_Lhc]

But your cable is only a metre long?

 

[Petherick]

I see what you're trying to do.
Have you tried using the coaxial connection on the DAC?
Do you have the ADC and the DAC set to the same sampling rate?
I'm guessing these are the low cost Chinese ones from eBay. Do they come with any instructions?

 

[hybridauth_Facebook_1228379303839245]

Besides the sampling rate, you have to make sure the Digital Format / encoding method are the same on both side.

 

[geraldwoollard]

Good news,

I have now got the adc to dac working,

the fault was a blob of solder shorting out pins on the surface mount chip,

so now to try with a rx and tx......Gerald