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Hi, Conrad.
My regular E-MU 0404 has been configured as Analog Stereo Output
for ages. When I received white edition, I plugged it in, and
didn't bother to configure anything (I don't even remember why do
I have Analog Stereo Output in the first place, I'd say it's a
happy coincidence). So the only difference between white and
regular on my system was the profile they were configured with. I
explicitly tested regular E-MU 0404 just now, and autoswitching
does not work if device is configured as Analog Stereo Duplex.
Now, another riddle:
* archlinux-arm on rPi3 | Analog Stereo Output: works
* archlinux-arm on rPi3 | Analog Stereo Duplex: **doesn't work**
* archlinux on amd64: works in both cases
So this limits the problem to my Raspberry Pi, which I use as a
shared sound server.
I played with modules loaded on my rPi. Namely, I tried disabling
native-tcp and zeroconf-publish modules (I thought maybe some
device on the network captures the card inputs and thus locks the
sampling frequency), but results are the same: autoswitching works
only with Analog Stereo Output profile.
Let me know if you are curious to try anything else on my setup,
I'd be happy to share results.
On 4/23/19 12:01 AM, Conrad Jones
wrote:
This is interesting, are you requiring to switch
the profile only on the white edition ?
I ask because I have a box full of these in storage, it
would be interesting if there is a difference if there is
different firmware at play on the device
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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