ChannelB is a very simple LV2 utility plugin.
This is a mono switchbox with one input and two outputs.
If actived, this switchbox send its input to the second output, else the input is sent to first output.
The switch is applyed with a crossfade, default crossfade is set to 50ms for clean but fast switch.
You can set the fade length up to 1000 seconds max (more than 16 minutes) to make a very progressive switch.
There are no particular dependencies except these ones needed to build an LV2 plugin.
To build and install just type:
$ make clean && make
$ [sudo] make install