The idea
Start with familiar instrumental tracks or low-key vocal music and keep the speaker away from the player who needs to hear calls clearly.
Try it at the table
Use what you already have, then test it under real light with real tiles.
If it misses
Keep the part you love and remove a competing detail. A playful room can change its mind.
Let the game stay visible.
Visual fun does not require borrowed cultural symbolism or a hard-to-play table.