The planet Eurythma is inhabited by a sentient species called Eurythmians, whose culture is built entirely around music. Among their achievements is a three-part harmony of incredible destructive power.
The inhabitants of Eurythma speak in a constant, lilting sing-song manner. Oddly, though they seem to be speaking perfectly understandable "English" (or whatever the common galactic language is), of all the Transformers who land on Eurythma, only Blaster and Soundwave, with their affinity for sound and music, seemed capable of understanding Eurythmians and constantly have to translate what the natives are saying to non-sing-song for the others. Carnage in C Minor