I need some help.
Unfortunately my Benchmark DAC3b via USB loses sync. I've tried most everything but completely open to suggestions.
Thanks in advance for your help.
# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 1: B20 [Benchmark DAC2 USB Audio 2.0], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
cat /proc/asound/cards
1 [B20 ]: USB-Audio - Benchmark DAC2 USB Audio 2.0
Benchmark DAC2 Benchmark DAC2 USB Audio 2.0 at usb-0000:01:00.0-1.1, high speed
Which LE hardware and LE version do you use?
LE 9.2.6 and Rpi 4
Make sure you are using a blue USB port and try one of those test builds.
Thanks for the reply and suggestion Da Flex.
I installed the latest test build:
LibreELEC-RPi4.arm-9.80-nightly-20201229-cb61a73.img.gz
Also, I tried both Blue and Black USB ports but unfortunately the same sync issue (my dac eventually loses sync).
I think USB data rate is too high to stay in-sync.
There is no quick solution for this. You could wait until LE is efficient enough, or you could buy a HiFiBerry DAC. Because HiFiBerry DAC uses GPIO instead of USB, it can handle high audio data rates more efficient.
Understood - Thanks Da Flex.
Perhaps changing the Alsa buffer would work as discussed in thread below?
ALSA - increase playback buffer / Multimedia and Games / Arch Linux Forums
If so, maybe set it to 128 instead of its current value of 512?
Not sure whether it's possible on LE. I read about many weird audio fixes for RPi4B, and I'm still thinking that internal data bus is the cause. Sometimes different cache settings did the trick, sometimes switching off de-interlacing did it.
Volumio is a dedicated free open source audiophile distro using a low latency kernel.
Google: Volumio
I cannot paste the url, the page returns 404 error.
I am a hardware person. Programming is not my forte.
The Linux Kernel uses
ALSA: Advanced Linux Sound Architecture - ArchWiki
and
PulseAudio: PulseAudio - ArchWiki
The information may make sense to a programmer. For the end user it is a nightmare.
Audiophile Linux: AudioPhile Linux | Quality audio on Linux is compile for the end user, yet the scripts are confusing and easy to make mistakes. The information may be useful to others trying to sort audio issues.
Excellent Hi-Fi Audio Test Site:
Archimago's Musings:
Main Page:
Raspberry Pi Audio Articles:
