> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zeroruntime.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Sanas

> Use the Sanas noise cancellation denoiser in a Zero Runtime pipeline. Setup and usage in Python, JavaScript, and Go.

Sanas is a professional **noise cancellation** denoiser. Unlike the local
[RNNoise](/plugins/denoise/rnnoise) plugin, Sanas runs server-side over the Zero Runtime
**inference gateway**, so it needs a gateway auth token. It occupies the pipeline's
`denoise` slot, cleaning the caller's audio before the rest of the pipeline runs.

## Setup

The denoiser connects to the inference gateway using your Zero Runtime auth token:

```bash theme={null}
export ZRT_AUTH_TOKEN=<token>
```

The token can also be passed explicitly to the factory.

## Usage

Build the denoiser with `SanasDenoise` and pass it to the pipeline's
`denoise` slot.

<CodeGroup>
  ```python Python theme={null}
  from zrt.inference import SanasDenoise

  denoise = SanasDenoise(model_id="VI_G_NC3.0")

  # Pipeline(denoise=denoise, ...)
  ```
</CodeGroup>

## Parameters

*Parameters for `SanasDenoise`. The JavaScript and Go SDKs expose the same settings in their idiomatic form.*

| Parameter       | Type  | Default        | Description                                                           |
| --------------- | ----- | -------------- | --------------------------------------------------------------------- |
| `model_id`      | `str` | `"VI_G_NC3.0"` | Sanas noise-cancellation model.                                       |
| `sample_rate`   | `int` | `16000`        | Audio sample rate (Hz) the model expects.                             |
| `chunk_ms`      | `int` | `20`           | Audio chunk size in milliseconds.                                     |
| `gateway_token` | `str` | `None`         | Auth token for the inference gateway. Falls back to `ZRT_AUTH_TOKEN`. |
| `base_url`      | `str` | `None`         | Override the inference gateway URL.                                   |

## Import paths

| SDK        | Import                                   | Constructor                        |
| ---------- | ---------------------------------------- | ---------------------------------- |
| Python     | `from zrt.inference import SanasDenoise` | `SanasDenoise(...)`                |
| JavaScript | `from '@zrt/js-sdk'`                     | `inference.Denoise.sanas({ ... })` |
| Go         | `.../zrt-golang-sdk/zrt`                 | `zrt.DenoiseSanas(...)`            |

Noise cancellation runs first, so [voice activity detection](/plugins/vad/silero) and
[speech-to-text](/plugins/stt/deepgram) see cleaner audio.