An item enchantment described as the dungeon's version of autotune, needed to make Donut's bard songs work.
Mordecai wants to find an item carrying the Golden Throat enchantment, which is apparently the dungeon's version of autotune. It matters because Princess Donut's new Bard class requires her songs to be sung in key, and she is catastrophically tone-deaf, which makes the whole class useless until the enchantment is found.
Her party support spells — Standing Ovation, Entourage and Encore — can be squeaked out in a flat monotone, but their power scales with how well she sings them, so they stay weak without the buff. The shopping trip through the town's vendors turns up no gear with the enchantment, and there is nothing good on the Shop Interface either.
An enchantment carried on magical gear rather than a visible object of its own.
The missing upgrade that would turn Donut's bard class from a joke into a weapon.