diff --git a/src/amp_main.c b/src/amp_main.c
index d0e7510..3cf865c 100644
--- a/src/amp_main.c
+++ b/src/amp_main.c
@@ -331,8 +331,10 @@ static void ampMute(bool value)
     if (value) {
         swTimSet(SW_TIM_SOFT_VOLUME, SW_TIM_OFF);
     } else {
-        audioSetTune(AUDIO_TUNE_VOLUME, grid->min);
-        swTimSet(SW_TIM_SOFT_VOLUME, SW_TIM_ON);
+        if (aProc->par.ic != AUDIO_IC_RELAY) {
+            audioSetTune(AUDIO_TUNE_VOLUME, grid->min);
+            swTimSet(SW_TIM_SOFT_VOLUME, SW_TIM_ON);
+        }
     }
 
     ampPinMute(value);
diff --git a/src/audio/audio.c b/src/audio/audio.c
index 15d729c..6c20d9a 100644
--- a/src/audio/audio.c
+++ b/src/audio/audio.c
@@ -181,8 +181,10 @@ void audioSetPower(bool value)
         audioSetFlag(AUDIO_FLAG_EFFECT3D, (aProc.par.flags & AUDIO_FLAG_EFFECT3D));
         audioSetFlag(AUDIO_FLAG_BYPASS, (aProc.par.flags & AUDIO_FLAG_BYPASS));
 
-        for (AudioTune tune = AUDIO_TUNE_VOLUME; tune < AUDIO_TUNE_END; tune++) {
-            audioSetTune(tune, aProc.par.tune[tune]);
+        if (aProc.par.ic != AUDIO_IC_RELAY) {
+            for (AudioTune tune = AUDIO_TUNE_VOLUME; tune < AUDIO_TUNE_END; tune++) {
+                audioSetTune(tune, aProc.par.tune[tune]);
+            }
         }
     }