I was looking for clues here and there, until I stumbled on this gist:
https://github.com/taravasya/taravasya_snips/commit/a99bc93365aafbdc8a735fe24a9f4107f857144e#diff-e2c3b1bfad69cc1fb921d18bdb7c2bd5
That gave me an idea, that perhaps switching profile from Duplex to
Output would solve my issue.
Indeed it did! I switched profile to Analog Stereo Output (instead of
Duplex) and frequency autoswitching started working.
Would you consider this a bug either in PulseAudio or Linux kernel?
Thanks
On 4/22/19 12:07 PM, edio wrote:
Hello,
I'm having trouble with sampling frequency autoswitching when using
E-MU 0404 USB soundcard.
This case is rather strange.
I have 2 E-MU 0404 USB soundcards: regular one (model EM8761) and
white edition (model EM8762).
Autoswitching in PulseAudio works with the regular one but not with
the white edition. However in ALSA both sound cards work as expected.
Here's dmesg output when I connect both:
----
[ 842.304339] usb 1-1.2: new high-speed USB device number 6 using dwc2
[ 842.446437] usb 1-1.2: New USB device found, idVendor=041e,
idProduct=3f04, bcdDevice= 1.00
[ 842.466211] usb 1-1.2: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 842.479357] usb 1-1.2: Product: E-MU 0404 | USB
[ 842.489520] usb 1-1.2: Manufacturer: E-MU Systems, Inc.
[ 842.500246] usb 1-1.2: SerialNumber:
E-MU-09-3F04-07D90916-0914D-8761T2A
...
[ 901.444396] usb 1-1.2: new high-speed USB device number 7 using dwc2
[ 901.586367] usb 1-1.2: New USB device found, idVendor=041e,
idProduct=3f04, bcdDevice= 1.00
[ 901.603744] usb 1-1.2: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 901.616060] usb 1-1.2: Product: E-MU 0404 | USB
[ 901.625459] usb 1-1.2: Manufacturer: E-MU Systems, Inc.
[ 901.635506] usb 1-1.2: SerialNumber:
E-MU-43-3F04-07D70109-0964D-STATION 01
----
From this both seem to be the same: vendor and product IDs are the
same. Yet somehow, PulseAudio works differently for them. Is there
maybe some sound card specific code in PulseAudio?
Would appreciate any hints and suggestions on how to debug the issue.
Thanks
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