On Thu, Sep 16, 2021 at 5:30 PM <pulseaudio-discuss-request@xxxxxxxxxxxxxxxxxxxxx> wrote: > > Send pulseaudio-discuss mailing list submissions to > pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > or, via email, send a message with subject or body 'help' to > pulseaudio-discuss-request@xxxxxxxxxxxxxxxxxxxxx > > You can reach the person managing the list at > pulseaudio-discuss-owner@xxxxxxxxxxxxxxxxxxxxx > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of pulseaudio-discuss digest..." > > > Today's Topics: > > 1. how to pass correct channel map (Vijendar Reddy Mukunda) > 2. Re: how to pass correct channel map (Sean Greenslade) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 15 Sep 2021 21:59:00 +0530 > From: Vijendar Reddy Mukunda <vijendar.reddy@xxxxxxxxx> > To: pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx > Subject: how to pass correct channel map > Message-ID: > <CABxRAMqJqMPKW3Xnu8+9ex92VW8+20DPwvXHkt8vh-vHXqqR2w@xxxxxxxxxxxxxx> > Content-Type: text/plain; charset="utf-8" > > Hello, > > I was just experimenting with a null sink. > I have created null sink with 48000Hz sample rate, s16le, channels as 6. > Tried to record from null sink monitor source. > But when i run parecord command, I am seeing the below error. > Warning: failed to write channel map to file. > I have also tried null sink creation > with channel_map=front-left,front-right,rear-left,rear-right,front-center,lfe. > But no luck. > Need inputs on fixing this channel map issue. > > Thanks, > Vijendar > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20210915/b43b188f/attachment-0001.htm> > > ------------------------------ > > Message: 2 > Date: Wed, 15 Sep 2021 22:36:23 -0700 > From: Sean Greenslade <sean@xxxxxxxxxxxxxxxxxx> > To: General PulseAudio Discussion > <pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx> > Subject: Re: how to pass correct channel map > Message-ID: <YULX1//S1wM8QFl2@bailey> > Content-Type: text/plain; charset=us-ascii > > On Wed, Sep 15, 2021 at 09:59:00PM +0530, Vijendar Reddy Mukunda wrote: > > Hello, > > > > I was just experimenting with a null sink. > > I have created null sink with 48000Hz sample rate, s16le, channels as 6. > > Tried to record from null sink monitor source. > > But when i run parecord command, I am seeing the below error. > > Warning: failed to write channel map to file. > > I have also tried null sink creation > > with channel_map=front-left,front-right,rear-left,rear-right,front-center,lfe. > > But no luck. > > Need inputs on fixing this channel map issue. > > That error is just a warning, and can most likely be ignored. Not all > sound formats actually support writing the channel map into them. In > fact, according to the libsndfile docs, only AIFF and CAF are supported: > > https://libsndfile.github.io/libsndfile/command.html#sfc_set_channel_map_info > > What file format are you using? > > --Sean Thank you for your explanation. We are trying to play youtube content. One more question on the same line. we have created a null sink with 192khz/8ch/s32le and channel map as "front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right" When we record null sink monitor output, we are seeing complete silence in one channel. As we are using lfe as one channel, do we need to do any extra settings on lfe channel? -Vijendar > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > > > ------------------------------ > > End of pulseaudio-discuss Digest, Vol 125, Issue 9 > **************************************************
