Tested on:RPi3; Google AIY voice HAT v1
Prerequisites:Raspberry Pi with Raspbian Jessie and internet connection (see steps 1-7 in the Introduction)
Hardware:Google AIY voice HAT
Adafruit MAX 98357A DAC
RPi3 and peripherals
Soldering equipment
Two channel screw terminal as the one used for the mono audio out
9 * 1cm pin
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Raspberry Pi and Google AIY voice HAT: stereo audio with the MAX 98357A DAC


Google AIY voice is great for setting up custom voice control systems with a Raspberry Pi. However, out-of-the-box it only supports mono audio, which is bad, for example for building a boom box. For stereo sound, it’s necessary to solder in a MAX 98357A DAC from Adafruit for around 6€.

Assembly
You need to solder as shown herein:

AIY voice HAT stereo solder points

AIY voice HAT stereo solder points

Seven pins need to connect HAT and DAC at point A, another two need to be connected at point B. The screw terminal needs to be soldered into point C and point D is a solder jumper whose contacts needs to be connected with solder:
AIY voice HAT with stereo

AIY voice HAT with stereo audio

Installation
Follow the installation intructions from Google for installing Google AIY voice; the disk image used herein is from 13.4.2018.

Start
Start Google AIY voice by entering

With the Google AIY voice HAT being extended for stereo audio, it’s simple to build an intelligent boombox.

Links
Adafruit MAX 98357A DAC: https://www.adafruit.com/product/3006
Google AIY voice installation: https://aiyprojects.withgoogle.com/voice/
Tutorial Google AIY boombox: http://www.knight-of-pi.org/a-voice-controlled-boombox-with-the-google-aiy-voice-hat/

Knight of Pi

Johannes Bergs aka Knight of Pi. Diploma in Bioinformatics, some Webdesign and Python coding then. Living in the beautiful city of Vienna.

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