Configure Output – V3D Settings Tab

New channel mask configuration
  1. Enable the V3D APO. If this is disabled, only stereo streams will be available without surround processing.
  2. Select a configuration preset based on the stream channel mask. The Default configuration will be used for all incoming streams that do not have a specified configuration.
  3. Add a new configuration. Clicking this button will display options for choosing the desired channels. When a stream is created using these channels, the configuration will be applied.
  4. Launch the Knob Control application. This is a demonstration app that controls the virtual speaker angles as points on a circle.
  5. Displays the current instances of the V3D APO and their channel masks. For example, 0x63f is a 7.1 channel mask while 0x3 is a stereo channel mask.
    • NOTE: If the filter driver is used, all instances will be created using the 0x63f channel mask.

V3D Configurations
  1. Displays the number of incoming channels for the current instance.
  2. Choose one of the built-in V3D configurations. Name codes in the dropdown menu work as follows:
    • HP = Headphones
    • 272 = stereo source virtual surround effect
      • 2 FIR filters
    • 772 = multichannel source surround effect
      • 4 (quad), six, or ten FIR filters
    • SP = Speakers
      • 4 (quad), six, or ten FIR filters
    • SP…15, 20, etc represent the angle of the loudspeakers relative to the listener.
      • 15 best for cel phones with 2 matched speakers
      • 20 best for laptops and tablets with 2 matched speakers
      • 25-30 best for soundbars and desktop speakers
  3. Skip V3D processing. This may be used for the mono channel mask where V3D is not required.
  4. Bypass HRTF processing. All incoming channels will be mixed to stereo without FIR filter processing. Effectively bypasses the V3D processing while allowing all incoming channels to be heard.
  5. Limit the number of V3D instances for the selected channel mask that may be created. This is useful to prevent audio dropouts on low-performance PCs.
  6. Set the angle of each virtual speaker in a 7.1 configuration.
  7. Set the center channel volume level.
  8. Set the maximum number of taps used in the FIR filters for HRTF processing. This is useful for minimizing the CPU impact for multichannel configurations.
    • The minimum allowed value is 80 taps. Lower taps result in a decreased low-frequency response and slightly less directionality.
    • Maximum taps (up to 512) will result in higher CPU usage, good directionality, and good low-frequency response.
    • A suitable compromise is ~200 taps. Contact your Bongiovi representative for more information.
  9. Check the box to play an audio tuning file. This audio will play from the selected virtual speaker so the user may calibrate the position to their preference.
  10. Mute any of the 7.1 input channels for calibration and testing.
  11. Set the output level of the FIR filter pairs. V3D creates a surround sound effect using a limited number of FIR filters for best performance. The number of FIR filters used is displayed in the Info area (18).
  12. Set the left/right balance of the HRTF effect.
  13. Displays information about the current V3D configuration:
    • Channel mask of the V3Dconfiguration (7). Default will display 0x0.
    • Count of channels input to the current V3D configuration (7).
    • The number of FIR filters used in the current V3D configuration. The minimum number is 2 (1 pair), the maximum number is 10 (5 pairs).
    • The number of FIR filter pair sets. This is used to create up, middle, and down positions to support 18.1 configurations. Currently, V3D configurations use only 1 set for the middle position.
  14. Audio input meters for each possible channel (up to 18.1 IMAX format).
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