Persist microphone mute and volume settings

client.go

@@ -80,6 +80,7 @@ func (b *Barnard) connect(reconnect bool) bool {
 		return false
 	}
 	b.Stream = stream
+	b.Stream.SetMicVolume(b.UserConfig.GetMicVolume(), false)
 	b.Stream.AttachStream(b.Client)
 	b.Stream.SetNoiseProcessor(b.NoiseSuppressor)
 	b.Stream.SetErrorFunc(func(err error) {

config/user_config.go

@@ -265,6 +265,13 @@ func (c *Config) SetMicVolume(v float32) {
 	c.config.MicVolume = &t
 }
 
+func (c *Config) GetMicVolume() float32 {
+	if c.config.MicVolume == nil {
+		return 1.0
+	}
+	return *c.config.MicVolume
+}
+
 func (c *Config) GetHotkeys() *Hotkeys {
 	return c.config.Hotkeys
 }

config/user_config_test.go

@@ -50,6 +50,17 @@ func TestMakeHostPortHandlesIPv6AndMalformedAddress(t *testing.T) {
 	}
 }
 
+// Regression: a stored zero mic volume was treated as an uninitialized value,
+// so a persisted mute became full volume after reconnecting.
+func TestMicVolumeAllowsPersistedMute(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "barnard.toml")
+	cfg := NewConfig(&path)
+	cfg.SetMicVolume(0)
+	if got := cfg.GetMicVolume(); got != 0 {
+		t.Fatalf("got %v, want mute", got)
+	}
+}
+
 func TestConfigUsesHomeEnvironmentForDefaultPath(t *testing.T) {
 	dir := t.TempDir()
 	t.Setenv("HOME", dir)

fix.txt

@@ -203,7 +203,7 @@ Priority 2: protocol and data correctness
 Priority 3: configuration, UI, and binding hardening
 ------------------------------------------------------
 
-26. Persisted microphone volume is unused and zero is impossible
+[x] 26. Persisted microphone volume is unused and zero is impossible
     Files: config/user_config.go, ui.go, gumble/gumbleopenal/stream.go
     MicVolume is stored but never applied when a Stream is created; UI changes
     do not call SaveConfig. GetMicVolume treats stored zero bits as

gumble/gumbleopenal/stream.go

@@ -131,6 +131,7 @@ func New(client *gumble.Client, inputDevice *string, outputDevice *string, test
 		sourceFrameSize: frmsz,
 		micAGC:          audio.NewAGC(), // Always enable AGC for outgoing mic
 	}
+	s.micVolume.Store(math.Float32bits(1.0))
 	if sourceChannels == 2 {
 		s.micAGCRight = audio.NewAGC()
 	}
@@ -331,11 +332,7 @@ func (s *Stream) StopSource() error {
 }
 
 func (s *Stream) GetMicVolume() float32 {
-	bits := s.micVolume.Load()
-	if bits == 0 {
-		return 1.0 // default on first access
-	}
-	return math.Float32frombits(bits)
+	return math.Float32frombits(s.micVolume.Load())
 }
 
 func (s *Stream) SetMicVolume(change float32, relative bool) {

ui.go

@@ -315,6 +315,9 @@ func (b *Barnard) OnMicVolumeDown(ui *uiterm.Ui, key uiterm.Key) {
 	}
 	b.Stream.SetMicVolume(-0.1, true)
 	b.UserConfig.SetMicVolume(b.Stream.GetMicVolume())
+	if err := b.UserConfig.SaveConfig(); err != nil {
+		b.AddOutputLine("Microphone: could not save volume: " + err.Error())
+	}
 }
 
 func (b *Barnard) OnMicVolumeUp(ui *uiterm.Ui, key uiterm.Key) {
@@ -323,6 +326,9 @@ func (b *Barnard) OnMicVolumeUp(ui *uiterm.Ui, key uiterm.Key) {
 	}
 	b.Stream.SetMicVolume(0.1, true)
 	b.UserConfig.SetMicVolume(b.Stream.GetMicVolume())
+	if err := b.UserConfig.SaveConfig(); err != nil {
+		b.AddOutputLine("Microphone: could not save volume: " + err.Error())
+	}
 }
 
 func (b *Barnard) OnQuitPress(ui *uiterm.Ui, key uiterm.Key) {