attack

Attack is a specific kind of phase — the initial phase of a sound's amplitude envelope. A competent speaker says 'attack is a phase of the envelope.' Files against nearest kind (phase), Law 9.

The concept of attack (acoustic phase of sound onset) depends on the concept of sound to operate. Remove the concept of sound and attack as an acoustic concept loses its entire referent — you cannot describe an attack phase without reference to sound. This is not meta-level: attack operates on the object-level concept of sound, not just its shareability.

attack is defined in audio/signal processing as the initial rise phase OF an amplitude envelope. The removal test: remove the concept of envelope and attack as an audio concept loses its operational meaning — there is no framework within which attack operates. This is operational dependency, not meta-level (Law 8b): attack is a PART-CONCEPT of the envelope, not just named alongside it. Files the direction: attack→envelope because attack needs the envelope concept to function.

The envelope (ADSR model) contains attack as a constituent phase — the attack is literally one part inside the whole envelope structure. A competent speaker says 'the envelope has an attack phase.' Files Law 10: CONTAINS is whole-and-part only.

The amplitude-envelope is a structured temporal model composed of named constituent segments. Attack is the first constituent part — the initial rise phase — of the envelope's temporal structure. Whole-and-part: the envelope (whole) contains attack (part), just as a car (whole) contains an engine (part). The ADSR model defines attack as a specific segment within the envelope's temporal architecture.

Attack is the initial rising phase of a transient envelope — a structural component. Transient as a temporal construct CONTAINS attack (rise), decay, sustain, and release as constituent temporal parts. This is a whole-to-part decomposition of the transient envelope.