This article discusses sonic materiality through Alfred North Whitehead’s organicist materialism. The sonic materiality that is here outlined is not related to sound vibration. Materiality should here be understood in the sense of actuality and concreteness. Anything that produces an effect bears a qualitative difference. The actualization of qualitative difference is concreteness. It is in this sense that sonic materiality is developed in parallel with spatiality. The liveliness of this space emergence is that of affect; its concreteness is that of affect. It is based on Affect theory that we may understand its experience as an immersion in a concrete but abstract qualitative difference, an abstract materiality. Thus, the sonic materiality departs from a conventional conception of objects to foster a sonic object that constitutes itself through relationality and extensive connections. The empirical concept of affective territory speculatively attempts to grasp the spreading out of affect expressiveness through these connections to track its effects in experience.