Hello everyone,

I am looking for support (or assistance with testing) for the newly released Creative Sound Blaster AE-X PCIe sound card.

The card features an internal PCIe-to-USB bridge and is successfully initialized by the 'snd-usb-audio' driver under a recent kernel. WirePlumber/PipeWire creates an "Analog Stereo" sink for it.

However, the card remains completely silent. There is no audio output at all, and toggling between Headphones and Speakers in the mixer controls does not physically route the audio, likely because the driver lacks the proper routing quirks and mixer mappings for this new ESS SABRE DAC architecture.

I have already done the initial legwork, gathered the `alsa-info` logs and the detailed verbose `lsusb -v` descriptors, and submitted an official upstream bug report to the Linux Kernel Bugzilla:

? https://bugzilla.kernel.org/show_bug.cgi?id=221613

If anyone else has this card, faces the same issue, or knows if work on a patch has already started somewhere, I would appreciate any pointers. I am fully available to test experimental patches/kernel builds.

Thanks!