ElevenLabsTTSService: Only reset the context_id when interruptions are enabled

CHANGELOG.md

@@ -45,6 +45,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `pyneuphonic` package. This removes a package requirement, allowing Neuphonic
   to work with more services.
 
+- Updated `ElevenLabsTTSService` to handle the case where
+  `allow_interruptions=False`. Now, when interruptions are disabled, the same
+  context ID will be used throughout the conversation.
+
 - Updated the `deepgram` optional dependency to 4.7.0, which downgrades the
   `tasks cancelled error` to a debug log. This removes the log from appearing
   in Pipecat logs upon leaving.

src/pipecat/services/elevenlabs/tts.py

@@ -642,8 +642,14 @@ class ElevenLabsTTSService(AudioContextWordTTSService):
                     yield TTSStartedFrame()
                     self._started = True
                     self._cumulative_time = 0
-                    # Create new context ID and register it
-                    self._context_id = str(uuid.uuid4())
+                    # If a context ID does not exist, create a new one and
+                    # register it. If an ID exists, that means the Pipeline is
+                    # configured for allow_interruptions=False, so continue
+                    # using the current ID. When interruptions are enabled
+                    # (e.g. allow_interruptions=True), user speech results in
+                    # an interruption, which resets the context ID.
+                    if not self._context_id:
+                        self._context_id = str(uuid.uuid4())
                     await self.create_audio_context(self._context_id)
 
                     # Initialize context with voice settings