Hi Daniel > > * ex1) > > * CPU0 --- Codec0 > > * CPU1 --- Codec1 > > * CPU2 -----/ > > * CPU3 --- Codec2 > > * > > * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec > > * => 7 DAIs = 4xCPU + 3xCodec > > * => 1 ccnf = 1xdummy-Codec > > > > > > So, I don't understand exactly how did you get the formula for links. AFAICT > > there should be 3 x CPU-Codec + 1 x CPU-dummy. CPU1/CPU2 and Codec1 are using DPCM. Thus, it is... 2xCPU-Codec: CPU0 - Codec0 CPU3 - Codec2 2xCPU-dummy: CPU1 - dummy CPU2 - dummy 1xdummy-Codec: dummy - Codec1 > Also, I wonder how can i use simple-card to create just a backend link > CPU-dummy + Codec :). > > Is this supported? Do you mean CPU-dummy + dummy-Codec ? But anyway, simple-card/audio-graph DPCM support is very limited. Unfortunately it doesn't have flexibility... Thank you for your help !! Best regards --- Kuninori Morimoto _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel