The tune drives the text - Competing information channels of speech shape phonological systems

In recent years there has been increasing recognition of the vital role of intonation in speech communication. While contemporary models represent intonation – the tune – and the text that bears it on separate autonomous tiers, this paper distils previously unconnected findings across diverse languages that point to important interactions between these two tiers. These interactions often involve vowels, which, given their rich harmonic structure, lend themselves particularly well to the transmission of pitch. Existing vowels can be lengthened, new vowels can be inserted and loss of their voicing can be blocked. The negotiation between tune and text ensures that pragmatic information is accurately transmitted and possibly plays a role in the typology of phonological systems.