audio-processing

Audio-processing operates on audio signals; remove signal and the processing has no input to operate on, so it ceases to function.

audio-processing IS a specific kind of signal-processing: it transforms audio signals using techniques like filtering, mixing, and amplification. Pinned sense: processing of audio-frequency signals (as opposed to RF, data, or other signal domains). Nearest kind per Law 9.

Linear-phase filter is designed and implemented for the sake of audio processing practice: it preserves waveform shape and avoids phase distortion in audio signal chains, enabling transparent filtering in music production, mastering, and communications. Servant points at master per Law 8d.

SERVES: ducking is built for the sake of audio-processing — its designed purpose is to temporarily reduce the volume of one audio signal in response to another within audio-processing workflows, enabling clear speech in mixed-signal audio.

Expander widens dynamic range by attenuating signals below threshold. Built for audio-processing. Servant→master per Law 8d.

MFCC is a feature extraction pipeline built and maintained specifically for speech and audio processing tasks; its cepstral coefficients are designed to capture perceptually relevant information for classification and recognition systems. Servant points at master per Law 8d.

Cepstral analysis is built to extract spectral envelope features for audio processing tasks such as speech recognition, speaker identification, and pitch detection; servant points at master.

Spatialization IS a specific kind of audio-processing: it creates the perception of sound direction, distance, and spatial location through signal processing techniques (HRTF, ambisonics, spatial panning). The audio-processing accepted definition explicitly lists spatialization as a processing type. Pinned sense: spatialization as an audio processing technique. Nearest kind per Law 9.

stereo is a specific technique of audio-processing that uses two channels to create spatial imaging; it is a particular instance of the broader audio-processing construct.

Cepstral peak prominence is a metric built and maintained for the sake of audio processing practice: it measures the salience of the cepstral peak for voice quality assessment, detecting periodicity and vocal effort in speech analysis toolchains. Servant→master per Law 8d.

Audio-dithering IS a specific audio processing technique: it decorrelates quantization error during bit-depth reduction in audio signal chains. The audio-processing definition explicitly lists 'restoration' as a processing type, and dithering is a restoration technique applied within audio processing chains. Nearest kind per Law 11e: audio-processing (not signal-processing, which audio-processing is itself an instance of).

A spectrogram is a visualization and computational representation built specifically to serve audio analysis and processing tasks; it is the servant artifact for the master domain of audio-processing. The note pins spectrogram as a tool for processing audio signals, not as a general image.

Audio-jitter is a measurement concept maintained for audio-processing practice: engineers monitor jitter to diagnose timing errors, design clocking and buffering strategies, and evaluate streaming quality. The concept is built for the sake of reliable audio processing; servant points to beneficiary per Law 8d.

Audio-routing IS a specific kind of audio-processing: it manipulates and redirects audio signals as part of the broader processing workflow. A competent speaker classifies routing as 'a kind of audio processing.' Nearest kind per Law 9.

Audio-clock-drift is a measurement concept maintained for audio-processing practice: engineers monitor drift to keep sample rates aligned across devices, compensate in playback/recording chains, and design clocking hardware. The concept is built for the sake of reliable audio processing; servant points to beneficiary per Law 8d.

Compressor is a dynamic range compression device built and maintained for the sake of audio processing: it attenuates signal peaks above a threshold according to configurable ratio, attack, and release parameters, enabling level control and tonal shaping in audio production. Servant points at master per Law 8d.

Audio-effect is a specific human-made technique or device that intentionally alters a sound signal, which is a particular operation within the human-made map of audio-processing. The audio-processing definition explicitly lists effects (reverb, delay, modulation, distortion) as processing types, making audio-effect the nearest kind rung for those concrete effect instances. Direction specific→general per Law 9, nearest kind per Law 11e.

Pinned sense: binaural-rendering as the HRTF-based two-channel spatial rendering technique. For-whose-sake test: binaural rendering is built and maintained for the sake of audio processing — it provides the spatial positioning and immersive audio capabilities that audio processing chains require for VR, gaming, music production, and film. The servant points at the master: rendering serves processing objectives. Consistent with spatialization's own SERVES edge to audio-processing.

phase-locked-vocoder is a specific vocoder variant built for audio processing tasks such as time-scale modification and pitch shifting in music production and speech processing. Servant points at master per Law 8d.

Mixer is an audio processing device built and maintained for the sake of audio processing: it combines, balances, and routes multiple audio signals through additive or matrix-based summing while preserving per-channel adjustability, enabling the core operations of audio production. Servant points at master per Law 8d.

spatialization processes are built to place or move audio sources in a perceived space; the construct exists to serve audio-processing objectives such as immersion and localization.

Cepstral peak picking is a pitch detection method built and maintained for the sake of audio processing practice: it extracts fundamental frequency from the cepstrum for speech/music analysis, voice activity detection, and pitch tracking in DSP chains. Servant→master per Law 8d.

Mid-side processing is a specific audio technique that encodes stereo signals into sum (mid) and difference (side) components. It is a particular kind of audio-processing operation, not a general class or a whole-part relation. Nearest kind: audio-processing.

Formant vocoder is built and maintained for the sake of audio processing: it enables creative voice synthesis, vocal timbre manipulation, and sound design in music production beyond speech processing. Its parameters (formant frequency tracks, bandwidths, excitation) are applied in audio workflows for vocal synthesis and voice conversion. Servant points at master per Law 8d. Consistent with phase-locked-vocoder's dual SERVES to audio-processing and speech-processing.

Griffin-Lim is an iterative phase retrieval algorithm built and maintained for the sake of audio processing: it reconstructs time-domain audio from magnitude spectrograms, enabling audio inpainting and vocoder applications. Servant points at master.

SERVES: equalizer is built for the sake of audio-processing — its designed purpose is to adjust the frequency balance of audio signals within audio-processing workflows, enabling tonal shaping and corrective filtering.

Limiter is a dynamic range processor built and maintained for the sake of audio-processing: it clamps peak signal levels to prevent overload and shape audio. Servant points to master — limiter serves audio-processing.

biquad-filter is a second-order IIR filter designed specifically to implement frequency-selective operations for audio signals; its purpose is to serve audio-processing tasks such as equalization and crossover filtering.

Makeup gain is a specific gain-restoration stage used within audio processing practice: it is a particular operation of amplification applied after dynamic-range compression to restore output level. A competent audio engineer classifies it as a kind of audio processing technique, not a general class. Nearest kind per Law 11e; the ladder does not already derive this rung via compressor → audio-processing.

SERVES: noise-gate is built for the sake of audio-processing — its designed purpose is to remove background noise from audio signals within audio-processing workflows, enabling cleaner audio processing outcomes.

Acoustic measurement is a practice built and maintained for the sake of audio-processing objectives: quantifying sound pressure, frequency response, reverberation time, and related parameters to inform mixing, mastering, room correction, and equipment design. Servant points at master per Law 8d; measurement provides the data audio-processing relies on to achieve tonal shaping and restoration goals.

Audio dithering is built and maintained for the sake of audio processing: it decorrelates quantization error and prevents distortion artifacts during bit-depth reduction in audio signal chains, enabling cleaner processing in recording and mastering. For whose sake? Audio processing benefits from dithering's error reduction.

Envelope follower is a specific signal-analysis block used within audio processing: it tracks slowly varying amplitude and outputs a control signal for dynamics, gating, and modulation. A competent speaker classifies it as a kind of audio processing operation. Nearest kind per Law 11e; ladder does not already derive this rung.

Mel-cepstral distortion is a metric built and maintained for the sake of audio processing practice: it quantifies spectral distortion between reference and synthesized speech for voice conversion and codec evaluation, used in research and product testing. Servant→master per Law 8d.

Phase vocoder is a signal processing technique built and maintained for the sake of audio processing: it modifies duration without changing pitch, enabling time-stretching and pitch-shifting applications. Servant points at master per Law 8d.