[pulseaudio-discuss] profile-set for CMEDIA USB2.0 High-Speed True HD Audio (147a:e055)

[Jean-Philippe Guillemin]

Thanks for your inputs :)

I'm going to try fixing from ALSA, but I'm not sure it's so easy cause this
card has input SPDIF on device #0 and output SPDIF on device #2.

I ended with this , for PA profile :

[Mapping iec958-stereo]
device-strings = hw:%f,2 hw:%f,0
channel-map = left,right
paths-output = iec958-stereo-output
paths-input = iec958-stereo-input
priority = 5


JP

2018-01-29 0:12 GMT+01:00 Tanu Kaskinen <tanuk at iki.fi>:

> On Fri, 2018-01-26 at 23:15 +0100, Jean-Philippe Guillemin wrote:
> > Hi,
> >
> > After some investigation on how to make the optical iec958 output work on
> > my CMEDIA based usb DAC, I finally found a solution : a profile-set has
> to
> > be added for this device.
> >
> > Added to udev 90-pulseaudio.rules :
> >
> > ATTRS{idVendor}=="147a", ATTRS{idProduct}=="e055",
> > ENV{PULSE_PROFILE_SET}="cmedia-high-speed-true-hdaudio.conf"
> >
> > Added profile set
> > /usr/share/pulseaudio/alsa-mixer/profile-sets/cmedia-
> high-speed-true-hdaudio.conf
> > (only specific part below) :
> >
> > ----------(default)------------
> >
> > [Mapping iec958-stereo]
> > device-strings = hw:%f,2
> > channel-map = left,right
> > paths-input = iec958-stereo-input
> > paths-output = iec958-stereo-output
> > priority = 5
> >
> > ----------(default)------------
> >
> > I hope this profile-set will be added to pulseaudio.
>
> It's better to fix this in alsa. I believe you can do the required
> change in /usr/share/alsa/cards/USB-Audio.conf quite easily. The "USB-
> Audio.pcm.iec958_device" section seems to contain rules for setting the
> correct iec958 device number for specific sound cards (the correct
> number is 2 in your case). I'm not sure where to get the right match
> string for your card, though. I would guess that it's visible in
> /proc/asound/cards. For example, I have this entry for my usb sound
> card:
>
>  1 [C10            ]: USB-Audio - CA DacMagicXS 1.0
>                       CA CA DacMagicXS 1.0 at usb-0000:00:1a.0-1, full
> speed
>
> I would guess that "CA DacMagicXS 1.0" would be the correct match
> string for this card.
>
> If you manage to edit USB-Audio.conf so that you don't need the
> modification in PulseAudio, then either send a patch to alsa, or tell
> what change you did and I'll send the patch for you.
>
> --
> Tanu
>
> https://liberapay.com/tanuk
> https://www.patreon.com/tanuk
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>
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