Yes @eatdogs but it depends on the provider and how Vapi exposes it. With Cartesia, you can typically control the sample rate (e.g., 8kHz–48kHz) if Vapi passes through the audio_format or output settings in the TTS config. With 11Labs, sample rate control is more limited it usually defaults to higher-quality output (like 44.1kHz), and Vapi may not let you explicitly downgrade it unless you post-process the audio. If you want, I can help you configure Vapi to enforce the closest supported output or add a resampling workaround.