[Sound-open-firmware] Question about topology with mixer

[Daniel Baluta]

On Tue, May 19, 2020 at 7:17 PM Ranjani Sridharan
<ranjani.sridharan at linux.intel.com> wrote:
>
> On Tue, 2020-05-19 at 16:06 +0000, Daniel Baluta wrote:
> > Hello everyone,
> >
> > Is there any topology that mixes two PCM streams that
> > we can take as an example to start with?
> >
> > We would like to do something like this:
> >
> > PCM0 ----> volume ----------------+
> >                                                    |-- LL mixer ---->
> > volume ---->DAI
> > PCM1 ----> volume ----> SRC --+
> >
> > Also, should this result in 1 sound card with 2 sub devices, right?
> Hi Daniel,
>
> We already have a pipeline similar to this that we use in our
> topologies. Take for example sof-apl-pcm512x.m4.
> It uses the "pipe-low-latency-playback" pipeline for PCM0 pipeline 1
> and the "pipe-pcm-media" pipeline (pipeline 5) is connected to the
> mixer in pipeline 1. Hope this helps.
>
>
> >
> > Is there a plan to write a topology GUI tool? Writing m4 files
> > is not really easy .
>
> We dont have a GUI yet for writing topologies but there's a tool to
> visualize the topologies that you build with m4 for now.

Care to share the name of the tool or some links to it? :)