Voice Plugin

Speech-to-text, text-to-speech, and voicebot with multi-provider support. Pro plugin.

Requires: Basic license tier or higher. nself license set nself_pro_...

Install

nself license set nself_pro_xxxxx...
nself plugin install voice

What It Does

Provides a unified REST API for voice processing: transcribes audio to text (STT via Whisper and other providers) and converts text to speech (TTS). Includes a voicebot mode that chains STT → AI reasoning → TTS for voice-interactive applications. Records and stores voice sessions.

Configuration

Env Var	Default	Description
VOICE_PORT	3714	Voice service port
VOICE_STT_PROVIDER	whisper	STT provider: whisper, deepgram, assembly
VOICE_TTS_PROVIDER	openai	TTS provider: openai, elevenlabs, azure
OPENAI_API_KEY	—	Required for OpenAI STT/TTS
DEEPGRAM_API_KEY	—	Deepgram API key (optional)
ELEVENLABS_API_KEY	—	ElevenLabs API key (optional)
VOICE_RECORDING_ENABLED	true	Store audio recordings

Ports

Port	Purpose
3714	Voice service REST API

Database Tables

3 tables added to your Postgres database:

• np_voice_sessions, voice session records
• np_voice_transcripts, STT transcription results
• np_voice_recordings, stored audio references

Nginx Routes

Route	Target
/voice/	Voice processing API