Docs: Add details on channel routing

README.md

@@ -83,13 +83,14 @@ graph TD
     iq1[Queue B] -->|in_queue_1| mix
     is0[Stream A] -->|in_stream_0| mix
     is1[Stream B] -->|in_stream_1| mix
-    il0[LineIn A] -->|in_line_0| mix
-    il1[LineIn B] -->|in_line_1| mix
-    ff[Fallback Folder] -->|fallback_folder| FBK
-    fpls[Fallback Playlist] -->|fallback_playlist| FBK
-    FBK[or] -->| | mix
-    mix[mixer] --> |output.alsa| C[fa:fa-play Line Out]
-    mix[mixer] --> |output.icecast| D[fa:fa-play Icecast]
+    il0[Line In 1-5] -->|in_line_0..4| mix
+    ff[Fallback Folder] -->|fallback_folder| which_fallback
+    fpls[Fallback Playlist] -->|fallback_playlist| which_fallback
+    mix["  Mixer  "] --> silence_detector
+    which_fallback{or} -->| | silence_detector{Silence Detector}
+    silence_detector -->| | output[Output]
+    output --> |output.alsa| C[fa:fa-play Audio Interface]
+    output --> |output.icecast| D[fa:fa-play Icecast]
 ```
 
 ## Testing