The id in the help text is not supported
Now that the raw_builder supports wildcard for rate, use it in loopback and add an option to force resampling as well.
Make sure we return the non-NULL buffers in all cases.
Sends the captured data from a source directly to a sink. It uses an input and output stream so the source and sink can be moved in pavucontrol, channel remixing is possible and the volume can be adjusted. See #959