Haunted Gramophone is very very quiet.
I don’t know if this is related to your issue, but if another player around you uses for example the /rank emote the music of all instruments will turn down.
So test it here:
Go to your home instance and turn down all sliders.
Then raise the Master Volume and the Player Instrument Volume only and play the Gramophone again.
I tried something similar to what you suggest in the lobby area of the Mad King’s Labyrinth. All the sounds are audible, they just aren’t very loud.