diff --git a/src/context.h b/src/context.h
--- a/src/context.h
+++ b/src/context.h
@@ -96,8 +96,9 @@
         newVolume = qBound<qint64>(0, newVolume, PA_VOLUME_MAX);
         pa_cvolume newCVolume = cVolume;
         if (channel == -1) { // -1 all channels
+            const qint64 diff = newVolume - pa_cvolume_avg(&cVolume);
             for (int i = 0; i < newCVolume.channels; ++i) {
-                newCVolume.values[i] = newVolume;
+                newCVolume.values[i] = qBound<qint64>(0, newCVolume.values[i] + diff, PA_VOLUME_MAX);
             }
         } else {
             Q_ASSERT(newCVolume.channels > channel);
diff --git a/src/volumeobject.cpp b/src/volumeobject.cpp
--- a/src/volumeobject.cpp
+++ b/src/volumeobject.cpp
@@ -38,7 +38,7 @@
 
 qint64 VolumeObject::volume() const
 {
-    return m_volume.values[0];
+    return pa_cvolume_avg(&m_volume);
 }
 
 bool VolumeObject::isMuted() const