+ virtual bool soundExists(int sound) = 0;
+ virtual void updateSoundPosition(int sound, v3f pos) = 0;
+
+ int playSound(const SimpleSoundSpec &spec, bool loop)
+ { return playSound(spec.name, loop, spec.gain); }
+ int playSoundAt(const SimpleSoundSpec &spec, bool loop, v3f pos)
+ { return playSoundAt(spec.name, loop, spec.gain, pos); }