Silence-Based EOS

Silence-Based EOS triggers end-of-speech after a fixed duration of silence following the last speech activity or transcript. No ML model, no inference overhead. Provider identifier: silence_based_eos

Source Location

api/assistant-api/internal/end_of_speech/internal/silence_based/
└── silence_based_end_of_speech.go

How It Works

A single worker goroutine manages a timer
When a final SpeechToTextPacket arrives, text is accumulated and the timer is set to timeout
When a VadSpeechActivityPacket or interim SpeechToTextPacket arrives, the timer resets
When the timer expires, EndOfSpeechPacket fires with the accumulated text
State resets for the next turn

STT final → accumulate text → start timer (1000ms)
VAD activity → reset timer
STT interim → reset timer
...silence...
Timer fires → EndOfSpeechPacket → LLM starts

Parameters

Option Key	Default	Range	Description
`microphone.eos.timeout`	`1000 ms`	500–4000 ms	Silence duration before triggering end-of-speech

The UI sets a default of 700 ms when switching to this provider. The backend default (when no value is configured) is 1000 ms.

Setup

No model files or downloads required. Works out of the box with both Docker and source builds. To select this provider, set microphone.eos.provider to silence_based_eos in the assistant’s audio options (or leave it unset — it is the default).

Getting Started

Dashboard (UI)

Web API

Assistant API

Integration API

Endpoint API

Document API

Source Location

How It Works

Parameters

Setup

​Source Location

​How It Works

​Parameters

​Setup

Source Location

How It Works

Parameters

Setup