pipecat/changelog/4390.added.md

• Added a max_buffer_delay_ms constructor argument to CartesiaTTSService for controlling Cartesia's server-side text buffering. When unset, Pipecat picks a sensible default based on text_aggregation_mode: 0 in SENTENCE mode (custom buffering — avoids stacking client-side aggregation on top of Cartesia's default 3000ms server buffer) and unset in TOKEN mode (Cartesia's managed buffering applies). Pass an explicit value (0–5000ms) to override.