Crate speech_prep 

speech-prep

Speech-focused audio preprocessing for Rust.

• Voice activity detection (dual-metric: energy + spectral flux)
• Multi-format decoding (WAV/MP3/FLAC/OGG/M4A/Opus → 16kHz mono PCM)
• Preprocessing (DC removal, high-pass filter, noise reduction, normalization)
• Speech-aligned chunking with overlap handling
• Quality assessment metrics

Usage

use speech_prep::VadConfig;

let config = VadConfig::default();
assert!(config.base_threshold > 0.0);

Re-exports

pub use buffer::AudioBuffer;

pub use buffer::AudioMetadata;

pub use chunker::ChunkBoundary;

pub use chunker::Chunker;

pub use chunker::ChunkerConfig;

pub use chunker::ProcessedChunk;

pub use error::Error;

pub use error::Result;

pub use monitoring::VADStats;

pub use pipeline::AudioPipelineCoordinator;

pub use pipeline::ProcessingResult;

pub use pipeline::StageLatencies;

pub use preprocessing::DcHighPassFilter;

pub use preprocessing::HighpassOrder;

pub use preprocessing::NoiseReducer;

pub use preprocessing::NoiseReductionConfig;

pub use preprocessing::PreprocessingConfig;

pub use preprocessing::VadContext;

pub use time::AudioDuration;

pub use time::AudioInstant;

pub use time::AudioTimestamp;

pub use types::AudioChunk;

pub use vad::NoopVadMetricsCollector;

pub use vad::SpeechChunk;

pub use vad::VadConfig;

pub use vad::VadDetector;

pub use vad::VadMetricsCollector;

Modules

buffer

Audio buffer types for batch audio processing.

chunker

Audio chunking aligned to VAD segments.

converter

High-level audio format conversion pipeline.

decoder

Audio decoding, resampling, and channel mixing utilities.

error

Error types for speech-prep.

format

Audio format detection and metadata extraction for the audio pipeline.

monitoring

Lightweight counters and VAD statistics.

pipeline

End-to-end audio processing coordinator.

preprocessing

Audio preprocessing module for clean, analysis-ready audio.

time

Stream-relative time types for audio processing.

types

Core types for audio processing.

vad

Voice Activity Detection (VAD) with dual-metric analysis.