Fixing an issue where some devices (usb) don't support channel 0, so i switched to virtual main volume

src/Makefile

@@ -4,7 +4,7 @@ INSTALLDIR = ~/Library/Application\ Support/com.elgato.StreamDeck/Plugins/com.dl
 #SDPLUGINDIR = "./com.dlprows.macvolumecontrol.sdPlugin"
 
 update:
-	killall Stream\ Deck.app || true
+	killall Stream\ Deck || true
 	go build -o $(INSTALLDIR) .
 	open -a Elgato\ Stream\ Deck
 

src/main.go

@@ -95,7 +95,7 @@ func setup(client *streamdeck.Client) {
 			return err
 		}
 
-		return setFeedbackIfNeeded(ctx, client, newSettings)
+		return setFeedback(ctx, client, newSettings)
 	})
 
 	action.RegisterHandler(streamdeck.WillDisappear, func(ctx context.Context, client *streamdeck.Client, event streamdeck.Event) error {
@@ -119,17 +119,14 @@ func setup(client *streamdeck.Client) {
 				ctx := context.Background()
 				ctx = sdcontext.WithContext(ctx, ctxStr)
 
-				setFeedbackIfNeeded(ctx, client, newSettings)
+				setFeedback(ctx, client, newSettings)
 			}
+			_currentSettings = newSettings
 		}
 	}()
 }
 
-func setFeedbackIfNeeded(ctx context.Context, client *streamdeck.Client, newSettings *volume.VolumeSettings) error {
+func setFeedback(ctx context.Context, client *streamdeck.Client, newSettings *volume.VolumeSettings) error {
-
-	if _currentSettings.OutputVolume == newSettings.OutputVolume && _currentSettings.OutputMuted == newSettings.OutputMuted {
-		return nil
-	}
 
 	payload := FeedbackPayload{}
 
@@ -151,10 +148,19 @@ func setFeedbackIfNeeded(ctx context.Context, client *streamdeck.Client, newSett
 
 	payload.Icon = ValueWithOpacity[any]{nil, opacity}
 
-	_currentSettings = newSettings
 	return client.SetFeedback(ctx, payload)
 }
 
+func setFeedbackIfNeeded(ctx context.Context, client *streamdeck.Client, newSettings *volume.VolumeSettings) error {
+
+	if _currentSettings.OutputVolume == newSettings.OutputVolume && _currentSettings.OutputMuted == newSettings.OutputMuted {
+		return nil
+	}
+
+	_currentSettings = newSettings
+	return setFeedback(ctx, client, newSettings)
+}
+
 type FeedbackPayload struct {
 	Value     ValueWithOpacity[string] `json:"value"`
 	Indicator ValueWithOpacity[int]    `json:"indicator"`

src/volume/coreAudio.go

@@ -2,8 +2,9 @@ package volume
 
 /*
  #cgo CFLAGS: -x objective-c
- #cgo LDFLAGS: -framework CoreAudio
+ #cgo LDFLAGS: -framework CoreAudio -framework AudioToolbox
  #include <CoreAudio/CoreAudio.h>
+ #include <AudioToolbox/AudioToolbox.h>
 */
 import "C"
 import (
@@ -42,11 +43,18 @@ func GetDefaultOutputDevice() (AudioObjectID, OSStatus) {
 
 func GetVolume(objectID AudioObjectID) (float32, OSStatus) {
 
+	properties := C.AudioObjectPropertyAddress{
+		C.kAudioHardwareServiceDeviceProperty_VirtualMainVolume,
+		C.kAudioDevicePropertyScopeOutput,
+		C.kAudioObjectPropertyElementMain,
+	}
+	/*
 		properties := C.AudioObjectPropertyAddress{
 			C.kAudioDevicePropertyVolumeScalar,
 			C.kAudioDevicePropertyScopeOutput,
 			0, //main channel
 		}
+	*/
 
 	var data C.Float32
 	dataSize := C.UInt32(unsafe.Sizeof(data))
@@ -65,11 +73,18 @@ func GetVolume(objectID AudioObjectID) (float32, OSStatus) {
 
 func SetVolume(objectID AudioObjectID, volume float32) OSStatus {
 
+	properties := C.AudioObjectPropertyAddress{
+		C.kAudioHardwareServiceDeviceProperty_VirtualMainVolume,
+		C.kAudioDevicePropertyScopeOutput,
+		C.kAudioObjectPropertyElementMain,
+	}
+	/*
 		properties := C.AudioObjectPropertyAddress{
 			C.kAudioDevicePropertyVolumeScalar,
 			C.kAudioDevicePropertyScopeOutput,
 			0, //main channel
 		}
+	*/
 
 	data := C.Float32(volume)