Added

• Added RTVIProcessor which implements the RTVI-AI standard. See https://github.com/rtvi-ai

• Added BotInterruptionFrame which allows interrupting the bot while talking.

• Added LLMMessagesAppendFrame which allows appending messages to the current LLM context.

• Added LLMMessagesUpdateFrame which allows changing the LLM context for the one provided in this new frame.

• Added LLMModelUpdateFrame which allows updating the LLM model.

• Added TTSSpeakFrame which causes the bot say some text. This text will not be part of the LLM context.

• Added TTSVoiceUpdateFrame which allows updating the TTS voice.

Removed

• We remove the LLMResponseStartFrame and LLMResponseEndFrame frames. These were added in the past to properly handle interruptions for the LLMAssistantContextAggregator. But the LLMContextAggregator is now based on LLMResponseAggregator which handles interruptions properly by just processing the StartInterruptionFrame, so there's no need for these extra frames any more.

Fixed

• Fixed an issue with StatelessTextTransformer where it was pushing a string instead of a TextFrame.

• TTSService end of sentence detection has been improved. It now works with acronyms, numbers, hours and others.

• Fixed an issue in TTSService that would not properly flush the current aggregated sentence if an LLMFullResponseEndFrame was found.

Performance

• CartesiaTTSService now uses websockets which improves speed. It also leverages the new Cartesia contexts which maintains generated audio prosody when multiple inputs are sent, therefore improving audio quality a lot.