diff --git a/ucm2/DEBUG.md b/ucm2/DEBUG.md
index 662b46f..40a2797 100644
--- a/ucm2/DEBUG.md
+++ b/ucm2/DEBUG.md
@@ -105,6 +105,18 @@ To check the configuration syntax, use `alsaucm -c hw:0 dump text` command
 (replace zero with the corresponding ALSA card number). This command should
 not return an error.
 
+Logs from PipeWire (wireplumber)
+--------------------------------
+
+````
+systemctl --user stop wireplumber
+WIREPLUMBER_DEBUG="spa.*:5" wireplumber
+````
+
+The alsa-ucm.c lines shows the selected and enabled devices in runtime.
+You may redirect the log output to a file and use a grep or another tool
+to filter them.
+
 Notes
 -----