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
On Mon, Apr 22, 2019 at 11:46 PM edio <e...@archlinux.us
<mailto:e...@archlinux.us>> wrote:
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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