Please find the reply below:- On Sun, Sep 18, 2016 at 5:19 PM, Tanu Kaskinen <tanuk at iki.fi> wrote: > On Sat, 2016-09-17 at 17:51 +0530, Nishit Sharma wrote: > > Hi All, > > > > I have observed strange behavior of PulseAudio8.0 which is as:- > > I have one card which have 2 devices AMIC and DMIC. I am using ALSA, UCM > > config files with PulseAudio. Before pulseaudio boots up Headset and DMIC > > have been connected on card. > > What does "connected on card" mean? > *On a sound card we have AMIC, DMIC, Speaker as different Playback and Capture devices * > > > When PulseAudio boots up it initializes AMIC ( > > Headset ) only and i can record using it. > > Now, the problem starts. When i plugged Headset the Port switching done > > from AMIC to DMIC and after sometime i got overrun without recording > > anything. > > You seem to be saying that AMIC is the same thing as Headset *Yes AMIC is detected as HeadSet when executed pulseaudio* but then you say that when the headset is plugged in, the port changes > from AMIC > to DMIC, which doesn't make sense. * I missed one thing, when i plugged out Headset from target board, pulseaudio switches port from AMIC to DMIC* * which i think should initializes ( hw params ) DMIC first as done for AMIC??* Why would the port change away from > the headset when the headset is plugged in? Did you mix up AMIC and > DMIC at some point in your description? > *Explained above ( When Headset plugged out the switching happened from > AMIC port to DMIC port )* > > My analysis:- PulseAudio should initialize both AMIC and DMIC ( setting > hw > > params and other stuff ) but only AMIC initialized. Only port switching > > should not have been happened as no hw params setup for DMIC. Port > switched > > but PulseAudio is expecting I/P for AMIC. Am i right here? > > Hw params are set when opening the PCM device. If AMIC and DMIC are on > the same PCM device, there's no need to reconfigure the hw params (or > if the hardware requires such reconfiguration, pulseaudio certainly > won't do it). It's a bit unclear unclear whether AMIC and DMIC are on > same or different PCM devices, but if they are two ports on the same > sink, then they are on the same PCM device. > > * If it is so then DMIC will be accepting HW params which were set for AMIC ( HeadSet ), but then there will be difference between the period size, buffer size passed to DMIC sink which **again can cause problem? * > I have no idea what you mean by "I/P". > > -- > Tanu > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20160918/b73890b1/attachment.html>
