MATRIX Voice and MATRIX Creator Running

Learn how to install the offline voice assistant, through the SAM CLI tool, for the MATRIX Creator and MATRIX Voice.


The Snips Console has been closed and cannot be used anymore. If you're looking for an alternative voice assistant, you can follow our guide here.

Required Hardware

Before getting started, let's review what you'll need.

  • Raspberry Pi 3 (Recommended) or Pi 2 Model B (Supported).
  • MATRIX Voice or MATRIXCreator â€“ Raspberry Pi does not have a built-in microphone, the MATRIX Voice&MATRIXCreator each have an 8 mic array – Buy MATRIX Voice or Buy MATRIX Creator.
  • Micro-USB power adapter for Raspberry Pi.
  • Micro SD Card (Minimum 8 GB) – An operating system is required to get started. You can download Raspbian Stretch and use the guides for Mac OS,Linux and Windows in the Raspberry Pi website.
  • External Speaker with 3.5 mm audio cable.
  • USB Keyboard & Mouse, and an external HDMI Monitor â€“ we also recommend having a USB keyboard and mouse as well as an HDMI monitor handy. You can also use the Raspberry Pi remotely, see this guide from Google.
  • Internet connection (Ethernet or WiFi)
  • (Optional) WiFi Wireless Adapter for Pi 2. Note: Pi 3 has built-in WiFi.

Let's Get Started

If you haven't already, be sure to setup your Raspberry Pi with your MATRIX Device.

Once setup, ensure you enable SSH on your Raspberry Pi. This allows the SAM CLI tool to connect to your Pi.

1. Installing the MATRIX Kernel Modules (Raspberry Pi)

Run the following commands in your Raspberry Pi's terminal to add the MATRIX repository & key and update your repository packages.

curl | sudo apt-key add -echo "deb $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/matrixlabs.listsudo apt-get updatesudo apt-get upgrade

Reboot your device.

sudo reboot

Install the MATRIX Kernel modules. Aside from a few other changes, this allows the microphones on your MATRIX device to register as an ALSA microphone on your Raspberry Pi.

sudo apt install matrixio-kernel-modules

You will then need to reboot a second time.

sudo reboot

These next commands will test your microphones by raising your output volume, creating a 5 second long audio recording, and then playing that recording.

Make sure you have a device that can output audio plugged into your Raspberry Pi's HDMI or Audio Jack.

amixer set PCM 100% && arecord recording.wav -f S16_LE -r 16000 -d 5 && aplay recording.wav

2. Installing the SAM CLI Tool (Personal Computer)

On your personal computer, you will be using the SAM CLI tool to create, manage and deploy your Snips assistants, to configure your hardware, to view the logs of your assistants on the Raspberry, as well as to run your application locally for quick prototyping.

On your personal computer, you'll need to install Node.js as a prerequisite. Once installed, you can install SAM into your computer with the following command.

macOS / Linux

sudo npm install -g snips-sam


Right click your Command Prompt and click â€œRun As Administrator”, before running the command below.

npm install -g snips-sam

3. Installing Through SAM (Personal Computer)

Although the installation will be on your Raspberry Pi, Snips will be installed through the SAM CLI tool from your personal computer. Open your personal computer's terminal and input the following commands.

This command should log all of the Raspberry Pis on your network with their IP address and hostname. If no devices are shown, you can follow this guide as an alternative for obtaining your Pi's IP address.

sam devices

Connect to your Raspberry Pi through one of the following:

  • Using your Pi's hostname.
sam connect raspberrypi.local
  • Or your Pi's IP address.
sam connect

You'll then be prompted to insert a username and password. The default login is as follows:

  • Username: pi
  • password: raspberry

After you're connected use the init command, from your personal computer, to install Snips onto your Raspberry Pi.

sam init

4. Configuring (Raspberry Pi)

With properly installed, the next step is to edit the snips.toml file for configuring the mics.

On your Raspberry Pi's terminal, run the following:

sudo nano /etc/snips.toml

Scroll down to where you see [snips-audio-server] and replace

# mike = "Built-in Microphone"

with the following:

mike = "MATRIXIO-SOUND: - (hw:2,0)"

Press ctrl+x, press y, and then press the enter key to save your changes.

5. Testing (Personal Computer)

Through your personal computer's terminal, you can use SAM to test the speaker and microphone of your Raspberry Pi.

  • Testing your Raspberry Pi's speakers
sam test speaker
  • Testing the microphones on your MATRIX device
sam test microphone

If both commands seem to work, you've properly configured on your Raspberry Pi!

This final command will test if is properly working by installing a demo assistant for the weather.

sam install demo

Once installed, test the assistant by saying

"Hey Snips!"

"What will the weather be like in Madagascar in two days?"

The response from Snips should be:

"You asked for the weather in Madagascar in two days."

6. Next Steps

You can now follow the guide with your now configured Raspberry Pi and MATRIX device.

Follow the guide below to create & deploy your own assistant!

Troubleshooting: Known Workarounds for Audio Playback Issues

If, after following the above steps, your Snips assistant is freezing when attempting to playback audio as indicated by sam watch, try the following workaround.

In the command line, edit the /etc/asound.conf file

sudo nano /etc/asound.conf

Replace the entire file with the code below

pcm.!default {  type asym  capture.pcm "mic"  playback.pcm "speaker"}pcm.mic {   type softvol   slave {     pcm "array"   }   control {     name "MicArray Master"        card "MATRIXIOSOUND"   }}pcm.speaker {  type plug  slave {    pcm "hw:0,0"    rate 16000  }}pcm.array {  type plug  slave {    pcm "hw:MATRIXIOSOUND"  }}

Then enter into the /etc/snips.toml file and scroll down to the section with [snips-audio-server]

sudo nano /etc/snips.toml

Copy-paste the following line at the end of that block

portaudio_playback = "default"

Your [snips-audio-server] section should now look like below.

Source: MATRIX Voice and MATRIX Creator Running

About The Author

Muhammad Bilal

I am highly skilled and motivated individual with a Master's degree in Computer Science. I have extensive experience in technical writing and a deep understanding of SEO practices.

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