TheFlash
Reiki Audio
You’re pretty passive-aggressive, aren’t you.If you have a more exciting one now would be a good time to show it
Always better than endless idle speculation and recycled marketing bumph ......
You’re pretty passive-aggressive, aren’t you.If you have a more exciting one now would be a good time to show it
Always better than endless idle speculation and recycled marketing bumph ......
It's divine intervention. Must be faith. Maybe a space telescope can register the unicorn fart particles that only the believers can hear.
That’s not bad.I used to think that might be the case, but now I am more inclined to think that stubborn objectivists are either bad listeners or try hard not to hear anything that they believe might not be audible...or both.
Subjectivists reject blind testing, objectivists refuse to listen.
The world is in balance.
I never tire of posting this graph from Archimago on this thread ... and still they keep coming for more
http://archimago.blogspot.com/2016/11/measurements-on-value-for-ethernet.html#more
... tiny noise bump in the inaudible range with ethernet in place ....
Measured in the ANALOGUE domain !!!
Archimago himself:
"Remember furthermore that I'm looking at the analogue output from an audio daughterboard inside the machine itself within close range of the ethernet chipset! Just how much effect does anyone think there would be if I had an external USB DAC connected to the Raspberry Pi? (Rhetorical question...)"
(emphasis added for the hard of hearing .....)
So now you are saying your ears can hear above 20kHz? Why would you need equipment to measure something that one can't hear.Don't get too excited about that graph.
Each of us on the other side of the fence to you might have different versions of what we think is happening but from my point of view that graph is not at all relevant to the mechanism I that I think is the cause of the audible differences. My version of possible events is that high frequency noise from the ethernet, possibly even in GHz territory, is causing IM distortion in the analogue stage of the DAC. That graph stops at about 100KHz as far as I can see but the noise is rising steeply from about 50 KHz onwards so who knows what level it reaches further up the frequency scale. I suggest looking up to say 5GHz. RF noise becomes harder to stop because of the ways that it can jump around filters etc put in its path.
Now I do have a spectrum analyzer which I think tops out at about 3GHz but I think a better test than looking for the noise would be to look at the analogue output from the DAC (as others have suggested) and to look for IM distortion with and without the ethernet connected. However this is likely to require some sensitive kit from Audio Precision or the like because even very small levels of IMD can be audible and I do not have access to such measuring devices.
So no, I do not think that graph is as important as you think it is.
Subjective in that case won't listen to reason and ignore repeatable, reviewed evidence. Ever heard of religion?I used to think that might be the case, but now I am more inclined to think that stubborn objectivists are either bad listeners or try hard not to hear anything that they believe might not be audible...or both.
Subjectivists reject blind testing, objectivists refuse to listen.
The world is in balance.
Mystical noise?C'mon Fourlegs surely a man with your depth of expertise in tackling signal cable borne rf propagation can throw a few ferrites in a box and sort this out.
Strange you should say you never had noise issues in your setup, isn't that exactly what your Wave cables are meant to deal with? Or are they for fixing the noise you never had?
Funny story...I was being transported between a couple of sites in a Gazelle heli one day, sitting on the floor of the Heli next to a large, two box R&S SA that cost more than my house! Pilot did a hard left, SA slid across the floor towards the open door, I grabbed it, it started to pull me with it. Bloke in the back with me, who was strapped in grabbed me so I didn't follow the SA out the door...never saw it again.Mystical noise?
Noise that is generated by IMPs down to the audio band that can't be measured on a 3GHz SA? Don't those things have scale settings, BW? They did the last time I used one.
@Fourlegs at what freqs and levels are these IMPs at please?
But the D-Link switch will kill much of this… as he uses a switch only 2m from his streamer. Cool. As recommended by experts and all that.
I never tire of posting this graph from Archimago on this thread ... and still they keep coming for more
http://archimago.blogspot.com/2016/11/measurements-on-value-for-ethernet.html#more
... tiny noise bump in the inaudible range with ethernet in place ....
Measured in the ANALOGUE domain !!!
Archimago himself:
"Remember furthermore that I'm looking at the analogue output from an audio daughterboard inside the machine itself within close range of the ethernet chipset! Just how much effect does anyone think there would be if I had an external USB DAC connected to the Raspberry Pi? (Rhetorical question...)"
(emphasis added for the hard of hearing .....)
Can you see it doing so in the graph?Does that tiny 6dB bump in the noise floor modulate the signal?
You’re pretty passive-aggressive, aren’t you.
Does that tiny 6dB bump in the noise floor modulate the signal?
Firstly your abject denial is quaint.Even if the D-Link did kill all that nasty noise that wasn't there in the first place (which it won't), It's still £2,730 cheaper than what is being touted on this thread ...
So either way you would be quids in when the non-existent noise that wasn't there in the first place doesn't get noticed when you listen to your toons
Just as one would say if it was a electrocardiogram...damn useful at visualising information graphs are, and so I this case too as it says that there is nothing audibleThe tiny 6db bump is less interesting than the nature of the experiment, which is far less relevant to this thread than its promoters would have us believe. Quick, pass me that graph… I know, I know, but I just need a graph, any graph.