Add respeecher tts plugin

examples/other/text-to-speech/README.md

@@ -1,3 +1,30 @@
-# Text-to-speech
+# Text-to-Speech Examples
 
-This small example shows how you can generate real-time audio data from text.
+These examples demonstrate real-time text-to-speech generation using various TTS plugins with LiveKit.
+
+## Environment Variables
+
+### Plugin API Keys
+Set the API key for your chosen plugin.
+
+### LiveKit Connection
+For connecting to LiveKit Cloud:
+- `LIVEKIT_URL` - Your LiveKit server URL
+- `LIVEKIT_API_KEY` - LiveKit API key
+- `LIVEKIT_API_SECRET` - LiveKit API secret
+
+## Running Examples
+
+Execute the example to connect to a LiveKit room and stream TTS audio:
+
+```bash
+uv run examples/other/text-to-speech/{your_plugin}_tts.py start
+```
+
+The agent will join the room and stream synthesized speech to participants.
+
+### Running Locally
+
+Running the examples with `console` mode won't play audio since the examples use `rtc.LocalAudioTrack`, which requires the LiveKit room infrastructure for audio playback. The `LocalAudioTrack` is designed to publish audio streams to LiveKit rooms where they are processed and distributed to participants. Without a room connection, the audio frames are generated but not routed to any playback device.
+
+To test TTS output locally without a LiveKit room, you would need to modify the example file to save the generated audio frames to a WAV file instead of publishing them to a track. The saved WAV file can then be played using any audio player on your system.

examples/other/text-to-speech/requirements.txt

@@ -2,5 +2,6 @@ livekit-agents>=0.12.18
 livekit-plugins-openai>=0.12.2
 livekit-plugins-cartesia>=0.4.11
 livekit-plugins-elevenlabs>=0.8.1
+livekit-plugins-respeecher>=0.0.1
 livekit-plugins-speechify>=0.1.0
 python-dotenv~=1.0

examples/other/text-to-speech/respeecher_tts.py

@@ -0,0 +1,57 @@
+import asyncio
+import logging
+
+from dotenv import load_dotenv
+
+from livekit import rtc
+from livekit.agents import AutoSubscribe, JobContext, WorkerOptions, cli
+from livekit.plugins import respeecher
+
+load_dotenv()
+
+logger = logging.getLogger("respeecher-tts-demo")
+logger.setLevel(logging.INFO)
+
+
+async def entrypoint(job: JobContext):
+    logger.info("starting tts example agent")
+
+    tts = respeecher.TTS()
+
+    source = rtc.AudioSource(tts.sample_rate, tts.num_channels)
+    track = rtc.LocalAudioTrack.create_audio_track("agent-mic", source)
+    options = rtc.TrackPublishOptions()
+    options.source = rtc.TrackSource.SOURCE_MICROPHONE
+
+    await job.connect(auto_subscribe=AutoSubscribe.SUBSCRIBE_NONE)
+    publication = await job.room.local_participant.publish_track(track, options)
+    await publication.wait_for_subscription()
+
+    async with tts.stream() as stream:
+
+        async def _playback_task():
+            count = 0
+            async for audio in stream:
+                count += 1
+                await source.capture_frame(audio.frame)
+
+        task = asyncio.create_task(_playback_task())
+
+        text = "Hello from Respeecher! I hope you are having a great day."
+
+        # split into two word chunks to simulate LLM streaming
+        words = text.split()
+        for i in range(0, len(words), 2):
+            chunk = " ".join(words[i : i + 2])
+            if chunk:
+                logger.info(f'pushing chunk: "{chunk} "')
+                stream.push_text(chunk + " ")
+
+        # Mark end of input segment
+        stream.flush()
+        stream.end_input()
+        await asyncio.gather(task)
+
+
+if __name__ == "__main__":
+    cli.run_app(WorkerOptions(entrypoint_fnc=entrypoint))

livekit-plugins/livekit-plugins-respeecher/README.md

@@ -0,0 +1,27 @@
+# Respeecher plugin for LiveKit Agents
+
+Support for [Respeecher](https://respeecher.com/)'s TTS in LiveKit Agents.
+
+More information is available in the docs for the [Respeecher](https://docs.livekit.io/agents/integrations/tts/respeecher/) integration.
+
+## Installation
+
+```bash
+pip install livekit-plugins-respeecher
+```
+
+## Pre-requisites
+
+You'll need an API key from Respeecher. It can be set as an environment variable: `RESPEECHER_API_KEY` or passed to the `respeecher.TTS()` constructor.
+
+To get the key, log in to [Respeecher Space](https://space.respeecher.com/).
+
+## Example
+
+To try out the Respeecher plugin, run the example:
+
+```bash
+uv run python examples/other/text-to-speech/respeecher_tts.py start
+```
+
+Check [`examples/other/text-to-speech/README.md`](../../examples/other/text-to-speech/README.md) for running details.

livekit-plugins/livekit-plugins-respeecher/livekit/plugins/respeecher/__init__.py

@@ -0,0 +1,44 @@
+# Copyright 2025 LiveKit, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Respeecher plugin for LiveKit Agents
+
+Voice cloning and synthesis plugin for LiveKit Agents using Respeecher API.
+"""
+
+from .tts import TTS, ChunkedStream
+from .version import __version__
+
+__all__ = ["TTS", "ChunkedStream", "__version__"]
+
+from livekit.agents import Plugin
+
+from .log import logger
+
+
+class RespeecherPlugin(Plugin):
+    def __init__(self) -> None:
+        super().__init__(__name__, __version__, __package__, logger)
+
+
+Plugin.register_plugin(RespeecherPlugin())
+
+# Cleanup docs of unexported modules
+_module = dir()
+NOT_IN_ALL = [m for m in _module if m not in __all__]
+
+__pdoc__ = {}
+
+for n in NOT_IN_ALL:
+    __pdoc__[n] = False

livekit-plugins/livekit-plugins-respeecher/livekit/plugins/respeecher/log.py

@@ -0,0 +1,3 @@
+import logging
+
+logger = logging.getLogger("livekit.plugins.respeecher")

livekit-plugins/livekit-plugins-respeecher/livekit/plugins/respeecher/models.py

@@ -0,0 +1,37 @@
+from dataclasses import dataclass
+from typing import Any, Literal, Optional
+
+TTSModels = Literal[
+    # Respeecher's English model, multilanguage models will be added later
+    "/public/tts/en-rt",
+]
+
+TTSEncoding = Literal["pcm_s16le",]
+
+
+"""Check https://space.respeecher.com/docs/api/tts/sampling-params-guide for details"""
+SamplingParams = dict[str, Any]
+
+
+@dataclass
+class VoiceSettings:
+    """Voice settings for Respeecher TTS"""
+
+    sampling_params: Optional[SamplingParams] = None
+
+
+class Voice(dict):
+    """Voice model for Respeecher - behaves like a dict with guaranteed `id` and optional `sampling_params`"""
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        super().__init__(*args, **kwargs)
+        if "id" not in self:
+            raise ValueError("Voice must have an 'id' field")
+
+    @property
+    def id(self) -> str:
+        return str(self["id"])
+
+    @property
+    def sampling_params(self) -> Optional[SamplingParams]:
+        return self.get("sampling_params")