analog-to-digital-converter

ADC's object-level domain of operation IS the signal — it converts analog signal to digital representation. Removing signal as a concept would not stop the ADC from physically operating, but the ADC's function IS signal conversion: its purpose and operation are constitutively about transforming signals from one form to another. This is object-level dependency (signal as material medium), not meta-level (signal as description). Consistent with DAC→signal and mixer→signal.

An analog-to-digital-converter is built and maintained for the sake of audio engineering practice: it digitizes microphone and instrument signals for recording, editing, and processing within the studio workflow. Servant points at master per Law 8d.

Law 9 specific-to-general, nearest kind: ADC's accepted carve is 'a hardware device that converts a continuous-time analog signal into a discrete-time, discrete-amplitude digital representation' — input form: continuous-time analog signal, output form: discrete-time/discrete-amplitude digital representation, transformation law: sampling plus quantization. Precisely converter's carve. No more specific kind node exists, so converter is the nearest accepted kind.

Law 8d servant→master device: the sample-and-hold exists to hold a stable value for the ADC's conversion stage — the accepted ADC definition names 'sampling via a track-and-hold circuit' as its own stage 2, and the S/H's accepted definition says it persists through implementation in analog-to-digital converters. Built for whose sake? The converter: without the hold, the (slower) quantization stage would measure a moving voltage. Pinned sense: S/H as the ADC's sampling stage, servant pointing at its master device (not the discipline, which is already covered by the ADC's own SERVES audio-engineering edge). Distinct from its accepted INSTANCE_OF sampling and DEPENDS_ON signal.