MediaSound volume control not fully working for MP4's

Thanks, jwatte, I don’t know how I missed your reply earlier. Again, thanks for taking a moment to help me and apologies if this sounds super n00b.

Anyway, I also must apologize for my lack of knowledge about audio – but how do I check the mix value? Unfortunately My mixer has no editable attributes and I don’t see anything in my Sound Class at all that makes reference to dB’s.

I was assuming that the SetSoundMixClassOverride node knows how to reduce the volume based on the value coming from the position of the slider. Zero = no volume, 1 = full volume.