NVIDIA

NVIDIA is a text-to-speech plugin. It converts the agent’s text responses into natural-sounding audio using NVIDIA’s GPU-accelerated Riva voices.

Setup

Set your NVIDIA API key in the worker environment. Generate a key from the NVIDIA build portal:

export NVIDIA_API_KEY=<key>

Import the plugin and pass it to the pipeline’s tts slot.

from zrt.plugins import NvidiaTTS

tts = NvidiaTTS()

# Pipeline(tts=tts, ...)

Parameter	Type	Default	Description
`api_key`	`str \| None`	`None`	NVIDIA API key. Falls back to the `NVIDIA_API_KEY` environment variable when unset.
`voice`	`str`	`"English-US-Female-1"`	Riva voice name, e.g. `"English-US-Female-1"` or a Magpie voice like `"Magpie-Multilingual.EN-US.Mia"`.
`language_code`	`str`	`"en-US"`	BCP-47 language tag for synthesis.
`sample_rate`	`int`	`22050`	Output audio sample rate in Hz.
`server`	`str`	`""`	Riva gRPC endpoint.

The synthesized audio is streamed back to the caller as soon as it’s generated, after the LLM produces its response.