diff --git a/firmware/drivers/audio/wm8751.c b/firmware/drivers/audio/wm8751.c
index 26123456b6..831f16ab17 100644
--- a/firmware/drivers/audio/wm8751.c
+++ b/firmware/drivers/audio/wm8751.c
@@ -79,7 +79,7 @@ static int tone_tenthdb2hw(int value)
     /* -6.0db..+0db..+9.0db step 1.5db - translate -60..+0..+90 step 15
         to 10..6..0 step -1.
     */
-    value = (10 - (value + 60) / 15) / 10;
+    value = 10 - (value + 60) / 15;
 
     if (value == 6)
         value = 0xf; /* 0db -> off */
diff --git a/firmware/sound.c b/firmware/sound.c
index 325c42639a..97d4bc268c 100644
--- a/firmware/sound.c
+++ b/firmware/sound.c
@@ -35,6 +35,10 @@
 #endif
 #endif
 
+/* TODO
+ * find a nice way to handle 1.5db steps -> see wm8751 ifdef in sound_set_bass/treble
+*/
+
 #if !defined(VOLUME_MIN) && !defined(VOLUME_MAX)
 #warning define for VOLUME_MIN and VOLUME_MAX is missing
 #define VOLUME_MIN -400
@@ -370,7 +374,11 @@ void sound_set_bass(int value)
 #endif
 
 #if (CONFIG_CODEC != MAS3587F) && (CONFIG_CODEC != MAS3539F)
-    current_bass = value * 10;
+#if defined(HAVE_WM8751)
+    current_bass = value;
+#else
+     current_bass =  value * 10;
+#endif
     set_prescaled_volume();
 #endif
 }
@@ -387,7 +395,11 @@ void sound_set_treble(int value)
 #endif
 
 #if (CONFIG_CODEC != MAS3587F) && (CONFIG_CODEC != MAS3539F)
-    current_treble = value * 10;
+#if defined(HAVE_WM8751)
+    current_treble = value;
+#else
+     current_treble =  value * 10;
+#endif
     set_prescaled_volume();
 #endif
 }