Why the web version of Classicube doesn't have sound? Is there a way to emit sound on web version of classicube?

I don't think so, the website lists these lack of features before you play, after all:

The web client lacks some features of the downloadable client

• No music/sound

• Lower performance

• Cannot connect to all servers

• Uses alternate textures

yes, i'm hoping for a way to implement the sound on web. is it possible? or is there other way to implement it.