USER GUIDE

• Overview
• Setting Up the Hardware
  • Introduction
  • Hardware Setup - USB Accessory (UA) Configuration
    • UA - Required Components
    • Setting up the Evaluation System in UA Configuration
    • Installing the UA firmware
  • Hardware Setup - I²S (INT-Device) Configuration
    • INT-Device Required Components
    • Setting up the INT-Device configuration
    • Installing the INT-Device Firmware
  • Setting up the Audio
    • Loudspeaker
    • Playback and Recording
      • I²S Audio Configuration
      • UA Audio Configuration
  • Troubleshooting
    • Audio Signals
    • Low volume of recorded audio during audio playback
    • Low volume of playback audio on Linux for XVF3800-UA
    • AEC Convergence
• Using the Host Application
  • Installing the Host Application
  • Connecting to the XVF3800 Device
  • xvf_host Command Syntax
  • Microphone orientation
    • Beam forming subsystem and Direction of Arrival indicator
    • Using azimuth data For Direction of Arrival indication
  • Example Uses
    • Output Selection
    • Setting an Output Pin
• Tuning the Application
  • System Preparation
    • Prerequisites
    • Initial Parameter Setting
    • Initial Tests
      • Input Path
      • Control Path
      • Output Path
      • Speaker Operation
      • Microphone Operation
  • Tuning the XVF3800 Parameters
    • Reference Gain
    • Microphone Gain
    • Silence level
    • System Delay
    • AEC Operation
    • AGC Configuration
    • Emphasis
    • MGSCALE
    • FMIN_SPEINDEX
    • Tuning the Non-Linear Model
      • Non-linear Echo
      • Tuning Setup for Non Linear model
    • Echo Suppression
      • PP_DTSENSITIVE
      • PP_GAMMA_E and PP_GAMMA_ENL
      • PP_GAMMA_ETAIL
    • Noise Suppression
    • ATTNS
      • ATTNS_NOMINAL
      • ATTNS_SLOPE
    • Path Change Detection
    • Output equalization
  • Changing Default Parameter Values
• Building the Application Firmware
  • Introduction
  • Prerequisites
    • Python3
    • XMOS tools
    • Build Tools
  • XVF3800 Release Package
    • Standard Configurations
    • Image Names
  • Build Process
    • Set up the environment
    • Configure the build system
    • Build an executable
  • Installing the Executable Image
    • Install Using xrun
    • Install Using xflash
  • Using SPI Boot
    • Creating a SPI Boot File
    • Using a SPI Boot File
      • Safe SPI Booting
      • Fast SPI booting
• Some Acoustic Design Guidelines
  • Microphones
  • Loudspeaker(s)
  • Enclosure and mounting
• DFU operations
  • Setting up the host computer (UA)
  • Setting up the host computer (INT)
  • Generation of Binary Upgrade Image
  • Examples of DFU operations
    • Download an upgrade image to the device
    • Revert the device to factory image
    • Reboot the device
    • Upload the images from the device
      • Error handling
• Automatic speech recognition
• HID Interface
• APPENDIX – Control Commands
  • AEC Tuning and Control Commands
  • Device Metadata Commands
  • Audio Manager Commands
  • GPIO Commands
• APPENDIX – Tuning the Loudspeaker
  • Adding EQ to the Loudspeaker Frequency Response
  • Setting the Maximum Loudspeaker Volume
  • Remaining Steps
• APPENDIX – Alternative Tuning Parameters
  • Personal Space Speakerphone using a Logitech Z50 loudspeaker
  • Shared Space Speakerphone at 4.5 m using a Genelec 8020 loudspeaker
• APPENDIX – List of applications
  • UA device applications
  • INT device applications