Is it possible to feed an alsa plugin with the output of two separate plugins?

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I have a configuration where two different audio sources go to specific, different, alsa chains. Let's call this chains A and B. At some point the next plugin (custom ladspa plugin) expects to be fed with a two channels stream. One of the channels comes directly from B who is producing a mono channel stream. The other channels should be a mix of output of the chain B (again monochannel) and channel 1 of chain A output (multichannel).



For a better understanding, here it is a schema of what I want to achieve.



enter image description here



I'm aware of this question, however, I do not need to mix all the streams coming from a plugin but just one of the channels. Is there a way an alsa plugin can accept inpout from two diferenciate chains, facilitating this configuration?



For the sake of this question I'm not able to use pulseaudio nor jack, but only alsa.






alsa plugin







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    I have a configuration where two different audio sources go to specific, different, alsa chains. Let's call this chains A and B. At some point the next plugin (custom ladspa plugin) expects to be fed with a two channels stream. One of the channels comes directly from B who is producing a mono channel stream. The other channels should be a mix of output of the chain B (again monochannel) and channel 1 of chain A output (multichannel).



    For a better understanding, here it is a schema of what I want to achieve.



    enter image description here



    I'm aware of this question, however, I do not need to mix all the streams coming from a plugin but just one of the channels. Is there a way an alsa plugin can accept inpout from two diferenciate chains, facilitating this configuration?



    For the sake of this question I'm not able to use pulseaudio nor jack, but only alsa.






    alsa plugin







    share|improve this question









    New contributor




    dezque is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















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      up vote
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      favorite











      I have a configuration where two different audio sources go to specific, different, alsa chains. Let's call this chains A and B. At some point the next plugin (custom ladspa plugin) expects to be fed with a two channels stream. One of the channels comes directly from B who is producing a mono channel stream. The other channels should be a mix of output of the chain B (again monochannel) and channel 1 of chain A output (multichannel).



      For a better understanding, here it is a schema of what I want to achieve.



      enter image description here



      I'm aware of this question, however, I do not need to mix all the streams coming from a plugin but just one of the channels. Is there a way an alsa plugin can accept inpout from two diferenciate chains, facilitating this configuration?



      For the sake of this question I'm not able to use pulseaudio nor jack, but only alsa.






      alsa plugin







      share|improve this question









      New contributor




      dezque is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I have a configuration where two different audio sources go to specific, different, alsa chains. Let's call this chains A and B. At some point the next plugin (custom ladspa plugin) expects to be fed with a two channels stream. One of the channels comes directly from B who is producing a mono channel stream. The other channels should be a mix of output of the chain B (again monochannel) and channel 1 of chain A output (multichannel).



      For a better understanding, here it is a schema of what I want to achieve.



      enter image description here



      I'm aware of this question, however, I do not need to mix all the streams coming from a plugin but just one of the channels. Is there a way an alsa plugin can accept inpout from two diferenciate chains, facilitating this configuration?



      For the sake of this question I'm not able to use pulseaudio nor jack, but only alsa.






      alsa plugin




      alsa plugin






      share|improve this question









      New contributor




      dezque is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









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      dezque is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      edited 11 hours ago









      Rui F Ribeiro

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      asked 12 hours ago









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