- Thread Starter
- #141
Warm welcome to the forum Rene!
192 samples corresponds to the (AES) S/PDIF block rate; every 192 samples the preamble is inverted. The 250 Hz jitter component is evidence of faulty clock extraction.
That sounds a very plausible candidate; using the frame rate would be a reasonable approach to locking the loop, if done properly...
Assuming you can get drivers for it, it should work. The quality of S/PDIF output may be suspect but a good DAC would filter that.
Extracting clock from the preamble may sound plausible but therein lies the rub.
Assuming you can get drivers for it, it should work. The quality of S/PDIF output may be suspect but a good DAC would filter that.
I had a bit of a think about how I might go about recovering a good clock. And it's not trivial...
I
My feeling, as also expressed elsewhere on this thread, is the best way to handle clock generation for a dac is to place a low jitter oscillator next to the chip and use either an ASRC or USB source for the dac data.
So people are now using an interface designed only to be used between chips on a PCB as the physical interface from the outside world? All because they think it gives better quality bits?With the popularization of I2S inputs on newer DACs....
So people are now using an interface designed only to be used between chips on a PCB as the physical interface from the outside world? All because they think it gives better quality bits?
What should be the reaction to such an idea? To laugh at it then ignore it, or set up a series of highly controlled listening tests? To many people it's the latter because they think that's science. But in fact this is a man-made system and doesn't need to be observed like the natural world. Using I2S as the interface to the outside world is just stupid and doesn't need to be tested in order to dismiss it.
S/PDIF is designed to be sent over cables. I2S is not..
It is not much more stupid than the ubiquitous SPDIF, and maybe less.
S/PDIF is designed to be sent over cables. I2S is not.
S/PDIF is designed to be sent over cables. I2S is not.