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Overview

This guide will walk you through setting up and using Krisp’s noise reduction capabilities in your Pipecat application. Krisp provides professional-grade noise cancellation that can significantly improve audio quality in real-time communications. To use Krisp’s noise cancellation, you’ll need to obtain their SDK and models through a Krisp developer account. Our Pipecat Krisp module simplifies the integration process, which we’ll cover in this guide.
If you’re looking to use Krisp’s VIVA SDK, follow the guide on Krisp’s website.

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Walkthrough

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Get Access to Krisp SDK and Models

  1. Create a Krisp developers account at krisp.ai/developers
  2. Download the Krisp Desktop SDK (v7) that matches your platform:
    • Linux: Desktop SDK v7.0.2: Linux
    • macOS (ARM): Desktop SDK v7.0.1: Mac ARM
    • macOS (Intel): Desktop SDK v7.0.1: Mac Intel
    • Windows(ARM): Desktop SDK v7.0.2: Windows ARM
    • Windows (x64): Desktop SDK v7.0.2: Windows
  3. Download the corresponding models. We recommend trying the Background Voice Cancellation model. Recommended model for each platform:
    • Linux (ARM): hs.c6.f.s.de56df.kw
    • Mac (ARM): hs.c6.f.s.de56df.kw
    • Linux (x86_64): hs.c6.f.s.de56df.kw
    • Mac (x86_64): hs.c6.f.s.de56df.kw
    • Windows (x86_64): hs.c6.f.s.de56df.kw
Krisp SDK Portal

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Install build dependencies

The pipecat-ai-krisp module is a python wrapper around Krisp’s C++ SDK. To build the module, you’ll need to install the following dependencies: 
# Using Homebrew
brew install cmake pybind11
For Windows users: Make sure you have Visual Studio installed with C++ development tools, or alternatively, have the Visual C++ Build Tools installed.

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Install the pipecat-ai-krisp module

In your Pipecat repo, activate your virtual environment: 
python3 -m venv venv
source venv/bin/activate
Export the path to your Krisp SDK and model files: 
# Add to your .env file or shell configuration
export KRISP_SDK_PATH=/PATH/TO/KRISP/SDK
export KRISP_MODEL_PATH=/PATH/TO/KRISP/MODEL.kef
When selecting a KRISP_MODEL_PATH, ensure that you’re selecting the actual model file, not just the directory. The path should look something like this:
export KRISP_MODEL_PATH=./krisp/hs.c6.f.s.de56df.kw
Next, install the pipecat-ai[krisp] module, which will automatically build the pipecat-ai-krisp python wrapper module: 
pip install "pipecat-ai[krisp]"

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Test the integration

You can now test the Krisp integration. The easiest way to do this is to run the foundational example: 07p-interruptible-krisp.py.
You can run a foundational example by running the following command:
python examples/foundational/07p-interruptible-krisp.py -u YOUR_DAILY_ROOM_URL

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Important for macOS users

If you’re running on macOS you may receive a security warning about running the script. This is expected. You can allow access by going to System Settings > Privacy & Security then click Allow Anyway to permit the example to run.
Security & Privacy
After allowing and re-running, you may get a pop-up asking for permission. Select Open Anyway to run the script.
Open Anyway

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Usage Example

Here’s a basic example of how to add Krisp noise reduction to your Pipecat pipeline: 
from pipecat.audio.filters.krisp_filter import KrispFilter
from pipecat.transports.services.daily import DailyParams, DailyTransport

# Add to transport configuration
transport = DailyTransport(
    room_url,
    token,
    "Audio Bot",
    DailyParams(
        audio_in_filter=KrispFilter(),  # Enable Krisp noise reduction
        audio_in_enabled=True,
        audio_out_enabled=True,
        vad_analyzer=SileroVADAnalyzer(),
    ),
)

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Troubleshooting

Common issues and solutions:
  1. Missing Dependencies
Error: Missing module: pipecat_ai_krisp
Solution: Ensure you’ve installed with the krisp extra: pip install "pipecat-ai[krisp]"
  1. Model Path Not Found
Error: Model path for KrispAudioProcessor must be provided
Solution: Set the KRISP_MODEL_PATH environment variable or provide it in the constructor
  1. SDK Path Issues
Error: Cannot find Krisp SDK
Solution: Verify KRISP_SDK_PATH points to a valid Krisp SDK installation

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Additional Resources