Lower engage and disengage volume

old-commit-hash: 6b6e3a0ca8124e4cd0aea82dbae0271dcd5f4a97

selfdrive/ui/soundd/sound.h

@@ -14,8 +14,8 @@ const float MAX_VOLUME = 1.0;
 
 const std::tuple<AudibleAlert, QString, int, float> sound_list[] = {
   // AudibleAlert, file name, loop count
-  {AudibleAlert::ENGAGE, "engage.wav", 0, MAX_VOLUME},
+  {AudibleAlert::ENGAGE, "engage.wav", 0, 0.3},
-  {AudibleAlert::DISENGAGE, "disengage.wav", 0, MAX_VOLUME},
+  {AudibleAlert::DISENGAGE, "disengage.wav", 0, 0.3},
   {AudibleAlert::REFUSE, "refuse.wav", 0, MAX_VOLUME},
 
   {AudibleAlert::PROMPT, "prompt.wav", 0, MAX_VOLUME},