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Overview

For streaming workloads, maintain a VadStreamState and process chunks individually. Each call emits at most one VadStreamEvent describing a speech start or end boundary.

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Quick Start

import FluidAudio

let manager = try await VadManager()
var state = await manager.makeStreamState()

for chunk in microphoneChunks {
    let result = try await manager.processStreamingChunk(
        chunk,
        state: state,
        config: .default,
        returnSeconds: true,
        timeResolution: 2
    )

    state = result.state
    print(String(format: "Probability: %.3f", result.probability))

    if let event = result.event {
        switch event.kind {
        case .speechStart:
            print("Speech began at \(event.time ?? 0) s")
        case .speechEnd:
            print("Speech ended at \(event.time ?? 0) s")
        }
    }
}

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VadStreamResult

PropertyTypeDescription
stateVadStreamStateUpdated state for next chunk
eventVadStreamEvent?Speech start/end (only at boundaries)
probabilityFloatRaw VAD probability (0.0-1.0)

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Notes

  • Chunks don’t need to be exactly 4096 samples
  • Call makeStreamState() to reset (equivalent to Silero’s reset_states)
  • Use probability for custom thresholding alongside the built-in hysteresis