Phase-locked vocoder is a human-made audio signal processing algorithm that modifies the horizontal phase progression between successive STFT frames to preserve phase coherence across frequency bins, reducing phasiness artifacts in time-stretching and pitch-shifting. Parameters: (1) analysis/synthesis window length and hop size; (2) pitch period estimate per frame; (3) phase locking rule — a threshold on inter-frame phase deviation that forces phase continuity by adjusting synthesis phase; (4) frequency bin grouping for phase propagation; (5) synthesis overlap-add parameters. Persistence mechanism: documented in audio engineering literature and DSP textbooks; implemented in reference DSP libraries, audio plug-ins, and real-time audio frameworks; coefficients and rules stored in software code and parameter presets. [formal: vocoder phase-lockus | substrate: behavior | horizon: generations | explicit: yes | epoch: 0.04]
Accepted ontology entry
phase-locked-vocoder
Phase-locked vocoder is a human-made audio signal processing algorithm that modifies the horizontal phase progression between successive STFT frames to preserve phase coherence across frequency bins, reducing phasiness artifacts in time-st…
Definition
Why it is in scope
A human-made audio signal processing algorithm built to persist as a phase-coherent variant of the phase vocoder used in time-stretching and pitch-shifting.
Names and aliases
- phase-locked-vocoderen · CANONICAL
Relations from this entry
- audio-processingSERVES →
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.
- speech-processingSERVES →
The phase-locked vocoder is a speech synthesis technique specifically designed for speech processing — its purpose is to process and synthesize speech signals with phase coherence. Servant (phase-locked-vocoder) points at master (speech-processing).
- cmspltmgd05tcjlsse8vqfce1DEPENDS_ON →
Pinned sense: phase-locked vocoder as algorithm that modifies horizontal phase progression between successive STFT frames. Removal test: remove short-time-fourier-transform — the analysis/synthesis frame representation the vocoder operates on — and the vocoder has no frames to modify; the algorithm stops operating. Dependency is object-level material requirement, not sayability.
- cmsrfbgwp01aykp53wp0b02wyDERIVED_FROM →
Phase-locked vocoder was developed as a modification of the original phase vocoder to address phasiness artifacts by enforcing horizontal phase coherence. The original phase vocoder existed first and fed into the development of the phase-locked variant.
- vocoderINSTANCE_OF →
Phase-locked vocoder is a specific variant of the vocoder family, preserving phase coherence across frames.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Sep 1, 2026, 2:30 AM UTC
- Content hash
- fe464c8862d3ab30b10f15fee0b4a1f7b830d46a6c7553c017e5fda87ab53215