2019-06-19
Copyright © 2019 XMOS Ltd, All rights reserved XM-013899-PC
VOCALFUSION DEV KIT - USER GUIDE
4
2. SETTING UP THE VOCALFUSION DEV KIT
Follow the steps below to set up and test the VocalFusion Dev Kit
Table 2: Configuration Steps
USB In/Out
I2S Slave
1
USB / Analog In
1
1. Configure hardware
Section 3.1
Section 5.3.2
Section 5.3.1
2. Test capture/playback
Section 4
Section 4
Section 4
Notes
1 Requires firmware update see Section 6.2.
2.1. AMAZON AVS SUPPORT
Developers who want to integrate the XVF3510 kit with the Amazon Alexa Voice Service (AVS) should refer to
the VocalFusion Dev Kit for Amazon AVS, which includes details about how to install the AVS SDK and Sensory
TrulyHandsfree wake word engine on the Raspberry Pi and use the I2S Slave configuration.
2.2. CHOOSING YOUR SPEAKERS
The choice of stereo speakers can greatly affect overall system performance.
•
The amplifier in the speakers should have linear gain. Non-linear gain (e.g. soft clipping) should be disabled or
avoided.
•
Any audio processing available on the speakers should be disabled.
• For low quality speakers it is best to use low volume settings to avoid non-linear distortions of the reference
signal.
The Logitech Z130 stereo speakers, for example, work well with the VocalFusion Dev Kit.
Place the kit on a horizontal surface, for example on a table at the edge of the room. Place the powered speakers
either side of the kit, making sure they don’t point directly at the microphone array.
