+- Moode Forum (https://moodeaudio.org/forum)
+-- Forum: moOde audio player (https://moodeaudio.org/forum/forumdisplay.php?fid=3)
+--- Forum: Support (https://moodeaudio.org/forum/forumdisplay.php?fid=7)
+--- Thread: [SOLVED] Audio glitching on Pi 5 (/showthread.php?tid=6710)
RE: Audio glitching on Pi 5 - simonb - 07-16-2024
(07-16-2024, 04:46 PM)TheOldPresbyope Wrote: Full up neurosurgery, huh
As my grandmother would say, we shall see.
Regards,
Kent
It fries your brain to be honest!
RE: Audio glitching on Pi 5 - robkyf - 07-17-2024
Ok, latest (and possibly final) update: new SD card, fresh install of moOde, internet radio playing only (so no music files on the SD and no attached USB devices). Result: same audible clicking/glitching as first reported (and if anything more pronounced and more regular).
I think I’ve exhausted all the options now. I can only conclude that the problem lies with some basic mismatch in the way my Audiolab DAC and the Pi 5 handle USB audio feeds.
I can’t see that the problem lies with moOde otherwise I’m sure others would have reported similar problems.
But on the positive side, my Pi Zero 2 W running moOde still works perfectly with my Audiolab, and the result is still a massive improvement on the DAP-based transport solution I was using previously. And it goes without saying that moOde is a joy to use!
The Pi 5 will just have to go back in its box and wait until I decide to update my DAC to something from this decade.
I’m still open to any other suggestions on what to do next, but I wanted to say a massive thank you to everyone who has so generously given their time and knowledge to try and help me find a solution.
RE: Audio glitching on Pi 5 - DRONE7 - 07-18-2024
Your Audiolab is an odd beast, CD player with a preamp .
Looking at the reviews this caught my attention
Quote:USB Audio allows you to select between 24/96 asynchronous mode and compatibility mode. Compatibility mode reverts the USB interface to adaptive operation. This should only be used if your computer set up does not function with asynchronous data transfer mode.
I guess you have tried changing the mode ? and the filters ?
My thoughts would be to select Sox resampling in the MoOde audio settings and sample to 24/96 out and select the 24/96 asynchronous input mode for the Audiolab settings.
Test and reply as there is something else that may be relevant.
Please post the output of
Code:
lsusbwith the Audiolab DAC connected.
RE: Audio glitching on Pi 5 - robkyf - 07-18-2024
Thanks @DRONE7.
The Audiolab 8200CD is a decade-old design but still sounds good to my ears. There is a CDQ variant that has ’proper’ preamp capabilities, but the simpler CD model I have is primarily designed to be a straightforward CD player with added DAC functionality. There are filters but they’re at the output end.
My model only allows asynchronous USB so I can’t change the way it ‘pulls’ the audio stream from the Pi 5.
I’ve tried switching on SoX resampling in moOde and experimenting with different bit/sample rates, but any changes make the Audiolab seriously unhappy: at lower sample rates the glitching seems to be less frequent and loud but is still there; at high rates it goes crazy and loses the USB lock.
The output from lsusb doesn’t seem to report anything more that the presence of the Pi 5 USB2/3 ports and the connection to the Audiolab DAC.
It was worth a try but I’m still left thinking there is some basic mismatch between the Audiolab and the Pi 5. But as mentioned in my previous posts, moOde running on my Pi Zero 2 W into the Audiolab works perfectly so all is not lost…
RE: Audio glitching on Pi 5 - DRONE7 - 07-19-2024
(07-18-2024, 09:29 PM)robkyf Wrote: Thanks @DRONE7.
The Audiolab 8200CD is a decade-old design but still sounds good to my ears. There is a CDQ variant that has ’proper’ preamp capabilities, but the simpler CD model I have is primarily designed to be a straightforward CD player with added DAC functionality. There are filters but they’re at the output end.
My model only allows asynchronous USB so I can’t change the way it ‘pulls’ the audio stream from the Pi 5.
I’ve tried switching on SoX resampling in moOde and experimenting with different bit/sample rates, but any changes make the Audiolab seriously unhappy: at lower sample rates the glitching seems to be less frequent and loud but is still there; at high rates it goes crazy and loses the USB lock.
The output from lsusb doesn’t seem to report anything more that the presence of the Pi 5 USB2/3 ports and the connection to the Audiolab DAC.
It was worth a try but I’m still left thinking there is some basic mismatch between the Audiolab and the Pi 5. But as mentioned in my previous posts, moOde running on my Pi Zero 2 W into the Audiolab works perfectly so all is not lost…
It's the USB id that is needed for investigating.
Post the output from lsusb.
RE: Audio glitching on Pi 5 - robkyf - 07-19-2024
Hi @DRONE7. Ok, here's the output:
Code:
[b]rob@moode[/b]:[b]~ $[/b] lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 0451:8200 Texas Instruments, Inc. Audiolab 8200 Series
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubRE: Audio glitching on Pi 5 - DRONE7 - 07-19-2024
(07-19-2024, 07:26 AM)robkyf Wrote: Hi @DRONE7. Ok, here's the output:
Code:[b]rob@moode[/b]:[b]~ $[/b] lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 0451:8200 Texas Instruments, Inc. Audiolab 8200 Series
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Excellent!
Have you got a powered USB hub that you can install between your Pi5 and the Audiolab DAC ?
There may be a usb issue re the TI usb hardware and the Pi5 USB. (vs the Zero2W)
Quote:Raspberry Pi 5
Raspberry Pi 5 has two USB2 ports and two USB3 ports (total 4). These ports are connected to 4 distinct USB hubs 1,2,3,4 in really weird configuration. If USB3 device is connected to blue socket, it will be detected on USB3 hub 2 or 4. If USB2 device is connected to any socket or USB3 device connected to black socket, it will be detected on USB2 hub 1 or 3. Regardless of USB2/USB3 connection type, blue sockets are always port 1, and black sockets are always port 2.
Each of 4 USB onboard hubs advertises as supporting per-port power switching, but this is not true. In reality, Raspberry Pi 5 all 4 ports are ganged together in one group, despite belonging to 4 different logical USB hubs.
https://github.com/mvp/uhubctl#faq
RE: Audio glitching on Pi 5 - robkyf - 07-19-2024
Thanks @DRONE7.
Yes, I think you’re right to conclude that the glitching problem I’m experiencing is almost certainly down to a USB interface issue.
Unfortunately, I don’t have a powered USB hub that I can install between the Pi 5 and the Audiolab. I realise they’re not exactly expensive but I’m disinclined for the moment at least to put another box in what I just want to be a simple Pi-to-Audiolab DAC chain.
Fortunately, my Pi Zero 2 W with its single micro USB port for outputting audio streams doesn’t have this problem, so I’m just going to press ahead with using that solution. When I do eventually replace the Audiolab, I’ll try again with the Pi 5.
RE: Audio glitching on Pi 5 - DRONE7 - 07-19-2024
Understood and as Tim's byline says 'Enjoy the Music!'
RE: Audio glitching on Pi 5 - simonb - 07-19-2024
You could buy a USB to spdif converter on Amazon. If it's doesn't work send it back. Assuming you've got a spare spdif optical or coax input on the DAC. Sort of future proofs the DAc as well.
Simon.