TTS Lip-Sync (legacy)

Legacy. The model-facing tts_speak action now lives in the Vox subsystem (vox_plugin.py). This plugin is kept only for backward compatibility with older callers that still invoke its internal audio generation directly.

It retains the internal text → audio helper used by legacy code paths but exposes no model-facing action. New work should use Vox instead.

Configuration

Key	Purpose
TTS_ENABLED	Enable the legacy helper.
TTS_ENDPOINTS	Legacy TTS endpoint list.
TTS_TIMEOUT_SECONDS	Request timeout.
TTS_OUTPUT_DIR	Where generated audio is written.
TTS_FALLBACK_TO_TEXT	Fall back to text if synthesis fails.