Ominous wind through the trees, funny dwarven racket, creak of a gate into an unknown household, thin creaking, funny voices of very scary spiders.  The register of creaking depends entirely on context, but tends toward the scary, adventurous, and high.

• 01.123 and the pine-trees on the Mountain creaking
• 02.039 and creaking
• 07.032 and the hobbit pushed open the heavy creaking gate
• 07.097 The great door had creaked
• 08.081 Their voices were a sort of thin creaking
• 09.056 He heard the creak of the water-gate being hauled up,
• 09.065 creaked and fretted.
• 12.027 and blowing while the ropes creaked,