what could be causing interrupted playback ( silence ) of a few seconds from RPi4 using usb to AKM4493S based dac/amp?

[audio_tony]

I thought for some reason to time incidences of the pauzes; oddly it seems to be more or less exactly 30 minutes between instances.....

Are there any cron jobs setup? crontab -l should list any jobs.

 

[Roy_D]

Its just vanilla OSMC out of the box installation of latest iteration. Absolute linux noob here. I disabled auto update.
Its just running the audio player.

 

[phofman]

What is the output audio device?

 

[Roy_D]

Thought to try a clean install, again, but this time use LibreElec but for some reason I can not connect to it from Yatse on mobile to control playback etc =_=
.But regardless the switch to a libreelec build did not fix the issue. Again 30m interval between 1-2 second break in audio playback.

 

[Roy_D]

What is the output audio device?

 

[amper42]

Kind of stumped as to what is causing this. The RPI4 has an overspecced PSU, is cool due to heatsink case, not running anything except OSMC and playing back FLAC and MP3 and OPUS files which when inspected are all without flaws in their data BUT at seemingly random times, not often mind you, there is a break in playback - total silence for a second or two - and then playback continues. Rewinding the song that had the pause ( occurs anywhere in a given song of any filetype ) yields non interrupted playback to where before there was a pause in playback..

The RPI4 is set to output over USB in digital sp/dif mode with a limit of 192kHz. I have also tried USB Analog ( which resamples anything to 48kHz )
but no difference. The occurances are as frequent.

Stumped and feeling stupid =/

I would suggest:
1. Get a Western Digital SC QD101 MicroSD Card 64GB WD Purple Surveillance Camera WDD064G1P0C
2. Install Moode on it using Raspberry Pi Imager.
3. Boot from the new card setup DAC in audio, setup UPnP and DLNA. Restart.

Try playing the same files and see if it works.

The playback interruptions described are a known issue with OSMC and Raspberry Pi setups.

​

 

[threni]

Try installing moOde, to rule out software being the issue.

 

[Roy_D]

Try installing moOde, to rule out software being the issue.

I would suggest:
1. Get a Western Digital SC QD101 MicroSD Card 64GB WD Purple Surveillance Camera WDD064G1P0C
2. Install Moode on it using Raspberry Pi Imager.
3. Boot from the new card setup DAC in audio, setup UPnP and DLNA. Restart.

Try playing the same files and see if it works.

The playback interruptions described are a known issue with OSMC and Raspberry Pi setups.

​

I had vanilla osmc rpi4 hooked up to Aiyima and SMSL previously and no such issues over usb.

I tried Moode recently but found the control over mobile phone excruciatingly laggy.
But an idea to further rule out causes yes.
Thank goodness its the weekend

 

[threni]

I tried Moode recently but found the control over mobile phone excruciatingly laggy.
But an idea to further rule out causes yes.

Just for diagnosis. Control moOde from your phone using any mpd client (m.a.l.p. for Android is great).

 

[phofman]

@Roy_D : unfortunately google does not seem to know any onos dac. Any more info, the dac specs?

 

[Roy_D]

@Roy_D : unfortunately google does not seem to know any onos dac. Any more info, the dac specs?

D3 Pro from O-Noorus

 

[Roy_D]

And now after re-installing another OS to the pi for the nth time today, back to OSMC, it now refuses to connect to wifi even though everything is set as it was.
Calling it a day and playing spotify from bluetooth =_=

**edit I could not leave it alone ofcourse and sd card one has OSMC on it again with all the vanilla options again after having formatted it 3x.
And SDcard 2 has Moode on it for tomorrow and my phone m.a.l.p. @threni =]
Why does the word MALP sound so familiar.. ah! from one of my son's and mine favorite sci fi series ^^

 

[phofman]

So standard XMOS interface. Did you test with different linux/computer that the DAC itself produces glitch-free output? E.g. incorrectly implemented async feedback in the xmos firmware would cause regular dropouts.

 

[threni]

it now refuses to connect to wifi even though everything is set as it was.

I'd recommend using USB 2 - not USB 3 - ports if you want to use wifi: reddit

 

[post]

Pretty sure the board is defective. Hopefully its still covered in your warranty

 

[Roy_D]

I got word from manufacturer they are definately looking into it. It could be a problem with the XMOS firmware and they hope to get back to me soon, possibly with a tool to load a new firmware update that solves the issue.
Good because the fault is grrr and trying to solve the problem myself and getting nowhere was even more grrrrr!

Thank you all for the help - certainly did learn some new things and thats always good!
Will update when there is news

 

[phofman]

As for the async feedback - on linux you can check the stream0 file while playing to see what the async feedback looks like. Very useful for troubleshooting any USB-audio device. E.g. https://www.diyaudio.com/community/threads/linux-and-24-96.384600/post-6981562

 

[Roy_D]

As for the async feedback - on linux you can check the stream0 file while playing to see what the async feedback looks like. Very useful for troubleshooting any USB-audio device. E.g. https://www.diyaudio.com/community/threads/linux-and-24-96.384600/post-6981562

Thank you