Hi. Can ground loop be the cause for noise in the usb?
Certainly - that's common to almost all USB sources, not just the Pi.Hi. Can ground loop be the cause for noise in the usb?
Alright. Thanks. I’ll see what I can do with my pi issue.Certainly - that's common to almost all USB sources, not just the Pi.
I would be surprised if the audio measurement interface and oscilloscope behind him has got any real use. His channel is clearly not technical, and while it does not claim to be, it certainly exudes that authority. He always regresses to what "he hears" and "his listening experience" when questioned, but does little to objectively explain why. Take from that what you will.He promised a while ago, while singing its praises, that he would make a video explaining WHY the Sonore ultra-rend made a "black background", but since then... silence. He *acts* like a measurement guy, but mostly just makes a video instruction and manufacturer specifications presentation.
That's probably issue #2215 which I mentioned earlier. Have you tried piCorePlayer with the same hardware?My experience with my Rpi 3B+ is that the USB is unusable due to clicks and pops and dropouts when streaming music to a USB dac using Moode player. So if that is what's occurring it's pretty apparent and disruptive. If that's not what's occurring and everything sounds fine. Then you are fine.
I have not but I will check it out. IMHO I think the issue is real, but it either works or it doesn't. It's not a subtle noise issue, but rather a functional one.That's probably issue #2215 which I mentioned earlier. Have you tried piCorePlayer with the same hardware?
I would be surprised if the audio measurement interface and oscilloscope behind him has got any real use.
No it’s Hans Beekhuizen. He looks like a really technical dude who knows what he’s talking about, but somehow I can’t help but feel he’s selling snake oil. Maybe he doesn’t even know it himself (because he has technical pesumptions).
I hear contradictory stuff about the Pi4 vs Pi3b+ . Because the ethernet and usb ports are somehow better seperated on the Pi4, the USB noise should be lower. But some other people point out that the 4 has higher noise because of the higher power consumption and faster cpu. Maybe I’m just blessed for not hearing all that noise on my RPi3b+? :-D
I agree the issue is real, and influenced by the software you're running among other things - some of the posts in the issue thread are mine. I asked about piCorePlayer because I've tried and failed to reproduce the issue with it on the same hardware that reliably has the problem with Volumio and Raspbian.I have not but I will check it out. IMHO I think the issue is real, but it either works or it doesn't. It's not a subtle noise issue, but rather a functional one.
A side issue - where did your piCorePlayer source it's music files from? I briefly tried piCorePlayer but it would not play AAC files from a Plex server. It would play mp3 and flac from the same Plex, and local AAC files, but I could never get it to play AAC stored remotelyI agree the issue is real, and influenced by the software you're running among other things - some of the posts in the issue thread are mine. I asked about piCorePlayer because I've tried and failed to reproduce the issue with it on the same hardware that reliably has the problem with Volumio and Raspbian.
Normally LMS running on a J1900 based server that also does a bunch of other stuff. The only problems I remember have been cue files with very short track sections confusing it (LMS end I think) and corrupted files that crash squeezelite. I don't have many AAC files though. Does Plex support streaming direct to squeezebox clients, or do you use an LMS instance as a bridge?A side issue - where did your piCorePlayer source it's music files from? I briefly tried piCorePlayer but it would not play AAC files from a Plex server. It would play mp3 and flac from the same Plex, and local AAC files, but I could never get it to play AAC stored remotely
I think Plex could stream direct, but in this case I used LMS and under remote music libraries enabled UPnP/DLNA client to make Plex visible as a dumb source.Normally LMS running on a J1900 based server that also does a bunch of other stuff. The only problems I remember have been cue files with very short track sections confusing it (LMS end I think) and corrupted files that crash squeezelite. I don't have many AAC files though. Does Plex support streaming direct to squeezebox clients, or do you use an LMS instance as a bridge?
No it’s Hans Beekhuizen. He looks like a really technical dude who knows what he’s talking about
The errors start here - WiFi is connected via sdio not usb.The bottom line on the 3B/B+ is that the USB 2.0 bus was used to host all other connectivity. That would be Ethernet, Wifi.
Widely repeated but demonstrably wrong - please stop spreading this rubbish. The bus is far from maxed out when glitches occur. There's a lot of detail in the kernel bug report. Short version - something (or somethings) odd and as yet not pinned down causes increased latency in the interrupt handling, resulting in the Pi sending the next chunk of data to the DAC just too late. An example of weirdness - BruteFIR is quite a good trigger for the problem, but if you pin the BruteFIR processes to a single cpu core the problem stops.So when you were playing higher bit rate's it would max out USB2.0 and cause glitches.
Great video, thanks for clearing all that up!Oh. Boy.
After his MQA debacle everyone should know his technical understanding is nill.
Here's my response video to his jitter and Ethernet connectivity:
As a result of this very nice site, a few months ago I bought a rpi4 and connected it to my nice rme adi2 dacv2. It sounds perfect. streaming via wifi is really stable (I use ubiquity ap‘s) and I use a standard rpi smps. I tried ropiee and volumio and both I like when using the rpi4 as a roon endpoint. Before I streamed via an onkyo all in one streamer/dac ns6170 ( I think also pretty good and well engineered with dual akm4490 dacs), but could sell it now because of really nice sounding and stable rpi4 rme adi2 combination. The rme digicheck test files I played via roon, rpi4, passed without any problem. So bit perfect And I would really advise positively on the rpi4 as usb streamer, even Via stable wifi.
Downstairs I use a Metrum Ambre decent and 20 times more expensive streamer, but to be honest, I cannot hear a difference. It is really a decent streamer well engineered I think, with nice psu and femto clocks and a connection to the dac bij i2s, utp connection. But I bought it years ago before I found this site ;-)
No it’s Hans Beekhuizen. He looks like a really technical dude who knows what he’s talking about, but somehow I can’t help but feel he’s selling snake oil. Maybe he doesn’t even know it himself (because he has technical pesumptions).