Hi

I'm trying to use Jaaa or Japa (two FFT sound analysers in real time which are in our dependancies) with a playback coming from different sources like VLC or Audacity.

I'm using QJackCtl, the graphical interface for jack-audio-connection.

I used Jack before on an Apple and in the input (the left column in my capture), I had in "System" 4 outputs : the 2 playbacks and the 2 lines in.

As you see in my capture, this is impossible to me to connect the playback of VLC or Audacity to Jaaa or Japa via Jack audio to make it work.

Is there anything wrong with my sound parameters in "system preferences" as I only have the line in or microphone for choice.

In other words, how can I make work Jaaa or Japa via Jack audio with a VLC or audacity playback ?

Thanks a lot.

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