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Which of the two DACs is being used if you use the coaxial i.e. SPDIF out of your DAC to connect to the SPDIF/coax in of your 5.1 A/V receiver?

post #1 of 11
Thread Starter 

Which of the two DACs is being used if you use the coaxial i.e. SPDIF out of your DAC (DAC1) to connect to the SPDIF/coax input of your 5.1 A/V receiver, which has its own DAC (DAC2), and then connect your headphone to the receiver? Are you hearing DAC1 or DAC2?

 

Additional information, the signal from my DAC to the receiver is clearly digital and not analogue. I say that because my receiver can tell you the number of channels (2, 5.1, 7.1 etc.) and bitz/khz (e.g. 24 bitz 96 khz) for any signal it receives via HDMI or coaxial in, but it can't give you that information if it receives an analogue signal (via the L/R RCA inputs for CD player, for example). With the coaxial out of my DAC going into the coaxial in of the receiver, it provides that information, and if I change that setting in my computer via windows (e.g. change it from 24 bits 96 khz to 16 bits 44 khz) the receiver's display reflects that change.

 

So if my DAC is putting out a digital sort of signal into the receiver, and my receiver has its own DAC to process digital signals, whose DAC am I hearing? The source DAC or my receiver's DAC? I can't completely tell a difference by ear (there might be a slight difference but it's too close to be sure).


Edited by ag8908 - 3/27/14 at 12:47pm
post #2 of 11
Thread Starter 

Never mind. I found out that if I use the coax/SPDIF out of this DAC, then the DAC is definitely being bypassed and that I'm really listening to the DAC of the Yamaha receiver. Leaving this thread in case anyone else has this question.

post #3 of 11
Quote:
Originally Posted by ag8908 View Post
 

Never mind. I found out that if I use the coax/SPDIF out of this DAC, then the DAC is definitely being bypassed and that I'm really listening to the DAC of the Yamaha receiver. Leaving this thread in case anyone else has this question.

 

I think you have it backwards, the external DAC (Digital to Analog Converter) can feed an analog audio signal into a receiver.

Or if the receiver has a S/PDIF (optical or coaxial) output, the receiver can send a digital audio signal to an external DAC.

So a DAC takes in a digital audio signal and outputs an analog audio signal.

There is also a converter, it can take in a USB digital audio signal and convert it to a S/PDIF (optical or coaxial) output.

Some DACs also offer a "converter" function, so it can output both a S/PDIF digital signal and output an analog signal.

So what is the external device that your using with your Yamaha receiver?.

post #4 of 11
Thread Starter 
It's the second to last sentence you wrote, with this dac http://item.taobao.com/item.htm?id=35324113465, which isn't functioning as a dac in my setup but rather as a usb-> spdif converter.
post #5 of 11
Quote:
Originally Posted by ag8908 View Post

It's the second to last sentence you wrote, with this DAC http://item.taobao.com/item.htm?id=35324113465, which isn't functioning as a DAC in my setup but rather as a usb-> spdif converter.

 

 

What source is the Breeze Audio PD05 plugged into?

post #6 of 11
Thread Starter 
It's connected to the computer's usb port and the Yamaha receiver's coaxial input the latter off which must be a digital input because the Yamaha can tell you the exact number of channels bits and kHz of signal going into that input (e.g. 2 channels 24 bits 96 kHz)
Edited by ag8908 - 3/27/14 at 8:02pm
post #7 of 11
Quote:
Originally Posted by ag8908 View Post

It's connected to the computer's usb port and the Yamaha receiver's coaxial input the latter off which must be a digital input because the Yamaha can tell you the exact number of channels bits and kHz of signal going into that input (e.g. 2 channels 24 bits 96 kHz)

You might consider connecting the computer straight to the Yamaha using S/PDIF (optical or coaxial), as the USB connection bypass the computer's sound card, but with S/PDIF (optical and coaxial) you still can use the sound card's features.

post #8 of 11
Thread Starter 
My computer doesn't have an spdif out and the receiver doesn't have that kind of usb in.
post #9 of 11
Quote:
Originally Posted by ag8908 View Post

My computer doesn't have an spdif out and the receiver doesn't have that kind of usb in.

 

What is the make and model of your motherboard or PC?

 

You can get a used Asus Xonar DX (PCI-E) or D! (PCI) sound card off eBay, it comes with a S/PDIF optical output

and has DDL (Dolby Digital Live), which would allow you to send up to 6-channels of compressed digital audio (or 2-channels uncompressed).

post #10 of 11
Thread Starter 
I have two both asus mbs but I can just use this piece of crap dac as an spdif convertor until I get a proper $1000 dac.
post #11 of 11
Thread Starter 

oh m f, apparently they even make super expensive USB -> SPDIF convertors, which are better than cheaper convertors. Isn't it all just 0s and 1s? How could one be better than the other?

 

http://www.computeraudiophile.com/f6-dac-digital-analog-conversion/15-universal-serial-bus-industry-standard-cables-connectors-and-communications-protocols-between-computers-and-electronic-devices-spdif-converters-shootout-15327/

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