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the latest version of agent. why after I filer in ...
# ask-ai
w
the latest version of agent. why after I filer in the tts_node, the text in the transcription_node also changes.
t
Thanks for reaching out, Zhe. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.
Thank you for sharing what you’ve observed! This happens because the 
tts_node
and 
transcription_node
can actually share the same text stream when 
use_tts_aligned_transcript=True
is set in the 
AgentSession
configuration. Essentially, this setting uses the pre-processed text from the 
tts_node
(like after filtering) for both TTS synthesis and transcription alignment. If you'd like to keep the 
transcription_node
unaffected by changes in the 
tts_node
, here are a couple of options you can try: • Disable 
use_tts_aligned_transcript
in your configuration. This way, the 
transcription_node
will get the original, unmodified text. • Or, you could add separate text preprocessing logic directly in the 
transcription_node
to override the shared behavior. Please feel free to reach out if you’d like any help with adjusting these settings or have more questions—I’m here to support you! Sources: Text and transcriptions | LiveKit Docs | Pipeline nodes and hooks | LiveKit Docs | livekit-agents/livekit/agents/voice/agent_activity.py | Docs::Agents | Pipeline nodes and hooks | LiveKit Docs
w
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t
Hi there! I just wanted to check in and see if the explanation helped resolve your issue. If you’re still having trouble with adjusting the settings for 
tts_node
and 
transcription_node
, please don’t hesitate to let me know—I’m here to help!
w
I got the warning as
t
Could you please share the full text of the warning message you received? That way, I can better understand what's going on and help you find the best solution. I'm here to help!
w
2025-09-25T063133.878Z WARN livekit.transport rtc/transportmanager.go:352 send data message error {"room": "room-p2Dw-2OgM", "roomID": "RM_viwWjoxHtbUa", "participant": "identity-5Xpg", "pID": "PA_jhC4JjTAfE7N", "remote": false, "error": "data channel is not available"}
2025-09-25T063133.878Z WARN livekit.transport rtc/transportmanager.go:352 send data message error {"room": "room-p2Dw-2OgM", "roomID": "RM_viwWjoxHtbUa", "participant": "identity-5Xpg", "pID": "PA_jhC4JjTAfE7N", "remote": false, "error": "data channel is not available"} Can you help me solve the above warning?
t
I understand how the warning "data channel is not available" can be a bit confusing. This usually happens when a participant tries to send data before their connection is fully ready—that is, before reaching the 
ACTIVE
state. It might be due to the WebRTC connection still setting up or some connectivity hiccups along the way. Here are some steps that can help you get past this: • Make sure the participant is completely connected and in the 
ACTIVE
state before attempting to send any data messages. • If you encounter data channel errors, try using the 
IssueFullReconnect
method. This triggers a full reconnect and often helps fix connectivity problems. • Check the quality of your WebRTC connection and how ICE candidates are negotiating. Sometimes, poor network conditions or ICE failures can stop data channels from establishing properly. • Keep an eye on the data channel states in your client SDK (like Flutter or Swift) to confirm the channels are open and ready before sending data. If you’re still running into issues after trying these, please don’t hesitate to reach out. I’m here to help you dig deeper and find a solution together. Sources: lib/src/core/engine.dart | Sources/LiveKit/Core/Transport.swift | CHANGELOG.md | LiveKit Server Components | livekit/livekit_composite | DeepWiki
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