Fixed: Spatial sound is either too loud or to quiet due to not needed…

… conversion from exponential scale to linear

src/harness/audio/miniaudio.c

@@ -182,8 +182,12 @@ tAudioBackend_error_code AudioBackend_SetVolume(void* type_struct_sample, int vo
     miniaudio = (tMiniaudio_sample*)type_struct_sample;
     assert(miniaudio != NULL);
 
-    // convert from directsound -10000 - 0 decibel volume scale
-    linear_volume = ma_volume_db_to_linear(volume_db / 100.0f);
+    // convert from Carmageddon "decibel" scale to linear <0.0f..1.0f>
+    linear_volume = (volume_db + 350.0f) / -5.0f;
+    if (linear_volume == 0.0f) {
+        linear_volume = 1.0f;
+    }
+    linear_volume = 1.0f / linear_volume;
     ma_sound_set_volume(&miniaudio->sound, linear_volume);
     return eAB_success;
 }