diff --git a/config.yaml b/config.yaml
index f62e3a1..3cb31ba 100644
--- a/config.yaml
+++ b/config.yaml
@@ -3,11 +3,13 @@ controller:
     vendorID: 0x45e
     productID: 0x285
     mappings:
-      - type: button
+      - comment: Play left
+        type: button
         midiChannel: 1
         midiKey: 7
         button: south
-      - type: control
+      - comment: Volume left
+        type: control
         midiChannel: 1
         midiController: 0
         axis: left-y
diff --git a/mapping.go b/mapping.go
index adca5a5..a5aa9fd 100644
--- a/mapping.go
+++ b/mapping.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"log"
 
 	"gitlab.com/gomidi/midi/v2"
 	"github.com/bendahl/uinput"
@@ -35,8 +36,10 @@ func (m ButtonMapping) TriggerIfMatch(msg midi.Message, virtGamepad uinput.Gamep
 	if m.Is(msg) {
 		switch msg.Type() {
 		case midi.NoteOnMsg:
+			log.Printf("%s: Button down\n", m.comment)
 			return virtGamepad.ButtonDown(m.gamepadKey)
 		case midi.NoteOffMsg:
+			log.Printf("%s: Button up\n", m.comment)
 			return virtGamepad.ButtonUp(m.gamepadKey)
 		default:
 			return fmt.Errorf("Invalid message type triggered ButtonMapping")
@@ -93,6 +96,8 @@ func (m ControlMapping) TriggerIfMatch(msg midi.Message, virtGamepad uinput.Game
 			valueNormalised -= 1
 		}
 
+		log.Printf("%s: value %v\n", m.comment, valueNormalised)
+
 		switch m.axis {
 		case LeftX:
 			return virtGamepad.LeftStickMoveX(valueNormalised)