On 06/07/2012 04:59 AM, Raymond Yau wrote: > > > David Henningsson <david.henningsson at canonical.com > <mailto:david.henningsson at canonical.com>> ? 2012?6?1??????? > > On 06/01/2012 04:54 AM, Raymond Yau wrote: > >> > >> 2012/5/30 David Henningsson<david.henningsson at canonical.com > <mailto:david.henningsson at canonical.com>>: > >>> > >>> On 05/30/2012 03:04 PM, Raymond Yau wrote: > >>>> > >>>> I am afraid this does not work with desktop computer which has front > >>>> mic , internal mic, Line in ,CD (or stereo mix with those via hda > >>>> codecs) > >>>> > >>>> With ubuntu 12.04 and unity , if I enable hda jack detect with my > >>>> ad198x on my desktop, sound preference does not allow me to select > >>>> front mic since I am still using ac97 front panel (with no jack detect > >>>> circuit) > >>> > >>> > >> > For those user with hda front audio panel, When the rear mic is > unplugged, pulse audio change the input to another sound card if there > is no plugged input jacks as pa don't regard cd or stereo mic as valid > port of the input source. > > When the rear mic is plugged before pulaseaudio start and it is the > first port of the input in the sound setting ,it change to the webcam > mic(second port) after the rear mic is unplugged. > > So it won't autoselect when The user plugged the rear mic again. He have > to select the rear mic in sound setting, the rear mic is the last port > in sound setting.it <http://setting.it> will change to the mic1of > another sound card(last port) I think we have to live with these kinds of issues in PulseAudio until Colin has completed his priority list implementation. > >> There are difference for the system settings/sound in unity and gnome > >> > >> In gnome session, the system settings/sound list the three hardcoded > >> ports (front mic, line and rear mic) instead of all the items in the > >> "Input source" / "Capture Source" controls ( There is no CD in HDA, > >> and no CD , stereo mix, aux, phone for my other sound cards with ac97 > >> codec) > >> > >> Is there any way to add back "Stereo Mix" to pulseaudio 's port ? > > > > Yes. See: > > > > > http://www.freedesktop.org/wiki/Software/PulseAudio/Backends/ALSA/Profiles > > > > However if you have additional questions about how to write > PulseAudio profiles and paths I might not have the time to help you out > with that, hopefully you will be able to sort that out by yourself. > > I have follows colin's tutorial compiling and running pulse audio from git. You don't need to recompile pulseaudio to change configuration files, they are all in /usr/share/pulseaudio/alsa-mixer > Do i need to build the unity/gnome sound setting and what are the name > of the system setting sound in gnome and unity? > > Although there is no aux in sound setting, select analog input in sound > setting will select the aux > > Why changing the input port from rear mic to front mic also change the > value of rear mic boost and front mic boost at the same time ? > > This forbid multi streaming capture using two mic. You can change this by changing the configuration files. > >> In unity session, the system settings/sound only list the plugged > jacks. > >> > >> I think the usage of jack detect to select input source automatically > >> is broken for for those motherboards which have three audio jacks in > >> rear panel and retask those pink and blue jacks for surround51 output. > >> > >> The module-switch-on-available-port should check whether "Channel > >> mode' is 6 and exclude the result those jack detect of "rear mic" and > >> "line in" since they have been retasked for output > > > > Hmm. That would lead to quite hairy code in PulseAudio, I'm > afraid...and I don't think it's the right way to solve the problem either. > > > > I think we could go about this in different ways. > > > > 1) The easiest way is to say that if you're changing "Channel mode" > manually in alsamixer, you're on your own. After all, the normal/newbie > end user would not know about alsamixer at all, so if you're capable of > changing things in alsamixer you're assumed to be capable of configuring > PulseAudio's profiles (using the link above) to match that as well. > > > > 2) We could make a policy decision to remove the code that retasks > the jacks, and direct people to hda-jack-retask if they want to do that. > That would mean simpler code for everyone - however, with the recent > addition of multi-IO in the Realtek driver (for example), things doesn't > seem to head that way... > > > > 3) We could add both "Line Out Surround Jack" and "Rear Mic Jack". > The "Rear Mic Jack" would always return present=no when you're in > 6-channel surround retask mode, and "Line Out Surround Jack" would > always return present=no when you're in the normal mode. > > > > > It seem that is not possible to implement 3) in current implementation > in hda-jack.c But everything is possible with the right patches :-) > I prefer an module parameter of hda for disable the creation of jack > detect control since this force pa to fallback like the other sound > cards which have no jack detection Why don't you just remove the jack detection from PulseAudio's configuration files instead? > The behaviour of desktop users are different from notebook users > The desktop users are unlikely to plug/unplug the jacks at rear panel > every time. They rather connected all the necessary jacks of the rear > audio panel > > >> BTW, the ICH8 HDA controller support multi stream capturing and ad1988 > >> has thee capture subdevices > >> > >> arecord -l > >> card 1: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] > >> Subdevices: 3/3 > >> Subdevice #0: subdevice #0 > >> Subdevice #1: subdevice #1 > >> Subdevice #2: subdevice #2 > > > > You would be able to make a multi-source profile in PulseAudio that > can record from all of these simultaneously, but we're missing a patch > that can control volumes and switches with indices, so you would have to > control the gain manually in alsamixer. > > > I don't think this work since when changing from rear mic to front mic, > pulseaudio also change the rear mic boost and front mic boost. > Especially when the pulse audio API does not allow application to select > different sink or source (I.e. Multi streaming playback/capture is not > supported by pulse audio) > > The possible way is > 1) an module parameter of hda driver to disable creation of jack > detection controls > 2) don't use module-switch-on-available-port in default.pa > <http://default.pa> > > Btw it seem sound is distorted when the application capture mono and the > sound card only support stereo is because pa just sum the left and right > channel (clipping) Ok. As a workaround, lower the input gain. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic
