<div dir="ltr"><div><div>Thanks for your inputs :) </div>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. </div><div>I ended with this , for PA profile : </div><div>[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 </div>JP </div><div class="gmail_extra"> <div class="gmail_quote">2018-01-29 0:12 GMT+01:00 Tanu Kaskinen <<a href="mailto:tanuk@iki.fi" target="_blank">tanuk@iki.fi</a>>: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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 <a href="https://liberapay.com/tanuk" rel="noreferrer" target="_blank">https://liberapay.com/tanuk</a> <a href="https://www.patreon.com/tanuk" rel="noreferrer" target="_blank">https://www.patreon.com/tanuk</a> _______________________________________________ pulseaudio-discuss mailing list <a href="mailto:pulseaudio-discuss@lists.freedesktop.org">pulseaudio-discuss@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss</a> </blockquote></div> </div>