diff --git a/services/audiopolicy/common/include/Volume.h b/services/audiopolicy/common/include/Volume.h
index a4cc759..4205589 100755
--- a/services/audiopolicy/common/include/Volume.h
+++ b/services/audiopolicy/common/include/Volume.h
@@ -18,6 +18,10 @@
 
 #include <system/audio.h>
 #include <utils/Log.h>
+#include <math.h>
+
+// Absolute min volume in dB (can be represented in single precision normal float value)
+#define VOLUME_MIN_DB (-758)
 
 class VolumeCurvePoint
 {
@@ -32,7 +36,7 @@
     /**
      * 4 points to define the volume attenuation curve, each characterized by the volume
      * index (from 0 to 100) at which they apply, and the attenuation in dB at that index.
-     * we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl()
+     * we use 100 steps to avoid rounding errors when computing the volume in volIndexToDb()
      *
      * @todo shall become configurable
      */
@@ -134,4 +138,20 @@
         }
     }
 
+    static inline float DbToAmpl(float decibels)
+    {
+        if (decibels <= VOLUME_MIN_DB) {
+            return 0.0f;
+        }
+        return exp( decibels * 0.115129f); // exp( dB * ln(10) / 20 )
+    }
+
+    static inline float AmplToDb(float amplification)
+    {
+        if (amplification == 0) {
+            return VOLUME_MIN_DB;
+        }
+        return 20 * log10(amplification);
+    }
+
 };
diff --git a/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h b/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h
index c6bb975..f1aee46 100644
--- a/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h
+++ b/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h
@@ -74,7 +74,7 @@
     audio_patch_handle_t mPatchHandle;
     uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output
     nsecs_t mStopTime[AUDIO_STREAM_CNT];
-    float mCurVolume[AUDIO_STREAM_CNT];   // current stream volume
+    float mCurVolume[AUDIO_STREAM_CNT];   // current stream volume in dB
     int mMuteCount[AUDIO_STREAM_CNT];     // mute request counter
     bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible
                                         // device selection. See checkDeviceMuteStrategies()
diff --git a/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp b/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp
index 0837a54..596aa1d 100644
--- a/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp
+++ b/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp
@@ -21,6 +21,7 @@
 #include "AudioOutputDescriptor.h"
 #include "IOProfile.h"
 #include "AudioGain.h"
+#include "Volume.h"
 #include "HwModule.h"
 #include <media/AudioPolicy.h>
 
@@ -354,11 +355,12 @@
     if (changed) {
         // Force VOICE_CALL to track BLUETOOTH_SCO stream volume when bluetooth audio is
         // enabled
+        float volume = Volume::DbToAmpl(mCurVolume[stream]);
         if (stream == AUDIO_STREAM_BLUETOOTH_SCO) {
             mClientInterface->setStreamVolume(
-                    AUDIO_STREAM_VOICE_CALL, mCurVolume[stream], mIoHandle, delayMs);
+                    AUDIO_STREAM_VOICE_CALL, volume, mIoHandle, delayMs);
         }
-        mClientInterface->setStreamVolume(stream, mCurVolume[stream], mIoHandle, delayMs);
+        mClientInterface->setStreamVolume(stream, volume, mIoHandle, delayMs);
     }
     return changed;
 }