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Add audio output post processing #953

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Add audio output post processing #953

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756cf4f
Add audio output post processing
phpmaple Oct 18, 2024
352e22c
Create silly-dryers-admire.md
phpmaple Oct 18, 2024
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5 changes: 5 additions & 0 deletions .changeset/silly-dryers-admire.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"livekit-agents": patch
---

Add audio output post processing
16 changes: 15 additions & 1 deletion livekit-agents/livekit/agents/multimodal/multimodal_agent.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@

import asyncio
from dataclasses import dataclass
from typing import Callable, Literal, Protocol
from typing import AsyncIterable,Awaitable, Callable, Literal, Protocol

import aiohttp
from livekit import rtc
Expand Down Expand Up @@ -92,6 +92,10 @@ def __init__(
self._update_state_task: asyncio.Task | None = None
self._http_session: aiohttp.ClientSession | None = None

# audio output post processing
self._audio_processor: Callable[[AsyncIterable[bytes]], Awaitable[AsyncIterable[bytes]]] | None = None


@property
def vad(self) -> vad.VAD | None:
return self._vad
Expand All @@ -104,6 +108,12 @@ def fnc_ctx(self) -> llm.FunctionContext | None:
def fnc_ctx(self, value: llm.FunctionContext | None) -> None:
self._session.fnc_ctx = value

def set_audio_processor(self, processor: Callable[[AsyncIterable[bytes]], Awaitable[AsyncIterable[bytes]]]):
"""
Set a custom audio processor function.
"""
self._audio_processor = processor

def start(
self, room: rtc.Room, participant: rtc.RemoteParticipant | str | None = None
) -> None:
Expand Down Expand Up @@ -145,6 +155,10 @@ def _on_content_added(message: realtime.RealtimeContent):
hyphenate_word=self._opts.transcription.hyphenate_word,
)

audio_stream = message.audio_stream
if self._audio_processor:
audio_stream = self._audio_processor(audio_stream)

self._playing_handle = self._agent_playout.play(
item_id=message.item_id,
content_index=message.content_index,
Expand Down