This article takes up Rebecca Saunders’ comments on the significance of timbre in her work to develop a timbre-centred analytical technique for two of her compositions, Ire (2012), for cello and ensemble, and Still (2011), for violin and orchestra. Two overarching principles are identified: the organisation of the pieces’ sounds into clearly differentiated categories, which can also overlap in different ways, and the use of a phrase-based logic in the pieces’ formal construction. Alongside the timbral construction, stable pitches acquire formal significance by virtue of their rarity and conspicuousness. I also elaborate on the ways in which perceptual ambiguity is fruitfully exploited in these works.