Hello, I'm working at some global effect processing stuff, for example, equalizer which affects several my applications which output sound through Pulseaudio. I want to implement it using GStreamer and virtual soundcard which all the applications will output their sound to. E.g. we set some virtual PA device as output for every application, say "devproc" and some processing GStreamer application use this device as its input and transfers stream to 'real' PA device (which stands for real soundcard) through some effects. My question is: is it possible to create a virtual device in Pulseaudio which has one input and one output and transfers stream from its input to the output? I tried different solutions including module-loopback (no success) and module-pipe-sink/source (gstreamer wasn't able to stream through it due to very low speed as I guess) but I have no success at all. Thank you in advance.