Describe the bug
There are 2 sounds completely introduced, that can be played via the /playsound command that aren't unused anywhere:

• block.empty_block.hit
• brick_block.break

Expected behavior
The block.empty_block.hit sound should be used when an Empty Block breaks and the brick_block.break sound should be used when a Brick Block or a Golden Brick Block breaks.

Thanks for the report!

This bug has been fixed in v1.1.

just to make sure, these sound events have the mubble namespace, correct? :)

Yes, as sounds.json tells.