VILLASnode/etc/examples/nodes/loopback.conf

nodes = {
	loopback_node = {
		type = "loopback",			# A loopback node will receive exactly the same data which has been sent to it.
							# The internal implementation is based on queue.
		queuelen = 1024,			# The queue length of the internal queue which buffers the samples.
		mode = "polling"			# Use busy polling for synchronization of the read and write side of the queue
	}
}