[Orange Pi 3] 768kHz Sample Rate on Topping E30 II Lite

I'm moderately confident the answer will be "the Linux drivers only support up to 384Khz" but please restart Kodi in debug mode, run "pastekodi" and share the URL so we can see audio properties and (hopefully) identify the kernel drivers being used.

We had a similar issue here:

Thread

Raspberry Pi 4 + LibreElec + Music Player Daemon + WavPack DSD

Hello!

I installed LibreElec 9.95.1 and mpd (as service addon) and found that when playing WavPack DSD files with a samplerate of more than 384 kHz, the sound is very interrupted. A search on the Internet did not give anything, the mpd settings also did not bring any result. And then I accidentally looked into:

mpd -V

­— and found that it was built without native support for the WavPack format, that is, it decodes it using ffmpeg. And ffmpeg DOES NOT RECOGNIZE DSD compressed with WavPack.

…

greenvorbisfan

June 29, 2021 at 3:05 PM

So maybe the Linux driver is capable, but MPD still needs the update from RPi.

In the older thread the "update from RPi" was a simple version bump to the MPD software used in the add-on, and that change was merged for all devices (back in 2021) and likely bumped to something more current a bunch of times since then. You can also see that we build mpd with WavPack support: https://github.com/LibreELEC/Libr…/package.mk#L91

Please run "lsusb -tvv | paste" and share the URL. This should list the USB devices and the drivers used - likely to be a generic USB audio device driver. I can then poke around in kernel code to see what max rates the driver supports (likely 384KHz).

Here are some specs:

E30 II lite - TOPPING AUDIO

It only needs the ASIO driver. That driver is used by many audio interfaces, and available for Linux since a long time. I doubt it misses features.

It supports 768kHz in 32 bit PCM mode, and that's transmitted over S/PDIF (IEC958) (not PCM):

m_displayName     : E30 II Lite
m_displayNameExtra: S/PDIF
m_deviceType      : AE_DEVTYPE_IEC958

So maybe something goes wrong with IEC958 to PCM conversion.

If you update to an LE13 nightly where the kernel is now on Linux 6.12, this patch (and others in the same series) is included:

[3/3] ASoC: spdif: extend supported rates to 768kHz - Patchwork

Run "pastekodi" with Kodi in debug mode again post-update.

Quote

Support for 24-bit and floating-point audio at up to 384,000hz

^ read from https://kodi.wiki/view/AudioEngine .. and visible here:

xbmc/xbmc/cores/AudioEngine/Sinks/AESinkALSA.cpp at master · xbmc/xbmc

Kodi is an award-winning free and open source home theater/media center software and entertainment hub for digital media. With its beautiful interface and…

github.com

Patching that list to add a higher value would be simple, but I doubt things are that simple.