Implement loopback backend

1 files changed, 27 insertions, 0 deletions

diff --git a/README.md b/README.md
index 7c62452..8a79d1f 100644
--- a/README.md
+++ b/README.md
@@ -115,6 +115,33 @@ NRPNs are not yet fully implemented, though rudimentary support is in the codeba
 
 The channel specification syntax is currently a bit clunky.
 
+### The `loopback` backend
+
+This backend allows the user to create logical mapping channels, for example to exchange triggering
+channels easier later. All events that are input are immediately output again on the same channel.
+
+#### Global configuration
+
+All global configuration is ignored.
+
+#### Instance configuration
+
+All instance configuration is ignored
+
+#### Channel specification
+
+A channel may have any string for a name.
+
+Example mapping:
+```
+loop.foo = loop.bar123
+```
+
+#### Known bugs / problems
+
+It is possible to configure loops using this backend. Triggering a loop
+will create a deadlock, preventing any other backends from generating events.
+
 ### The `osc` backend
 
 TBD