The StarLeaf Portal allows configuration of Group Telepresence audio settings.

To view audio settings:

  1. Log in to the Portal and go to Room systems.
  2. Select the pencil icon beside the Group Telepresence system you want to view.
  3. Select the Audio and video settings drop-down as shown below.

Microphone settings

StarLeaf microphones

If you are using StarLeaf microphones, choose Audio inputs > Device > StarLeaf microphones. Do not alter other settings unless there is a particular problem:

  • Phantom power is required and cannot be configured for StarLeaf microphones.
  • Volume 0dB: The volume setting adjusts the loudness of the people who are in the same room as the microphone, as heard by the other participants in the call. The recommended setting is 0dB or 6dB. Only use 12dB in very large rooms or under guidance from StarLeaf Support.

3rd party XLR microphones

If you are using 3rd party XLR microphones, choose Audio inputs > Device > 3rd-party microphones.

  • Phantom power: Phantom power is a way of providing power to a microphone. The StarLeaf GT Mini 3330 and Group Telepresence 3351 both offer phantom power through each of its XLR connectors for use by active microphones, such as the StarLeaf Microphone. The phantom power supply can be enabled or disabled here. It is compatible with active microphones, which are designed for 48V phantom power. If you are using a third-party microphone, refer to your microphone’s documentation to discover whether or not you need to provide phantom power
  • Volume: The volume setting adjusts the loudness of the people who are in the same room as the microphone, as heard by the other participants in the call. For the volume, the recommended setting is 0dB or 6dB. Only use 12dB in very large rooms or under guidance from StarLeaf technical support
  • Gain: Using this setting alters the gain on the XLR connectors on the Group Telepresence system
  • Disable ECAN: This setting, when selected, disables echo cancellation. Do not disable ECAN unless you have specific cause to do so. Only disable ECAN if you are using additional equipment to suppress the loudspeaker signal on all microphone signals

Line in microphones

If you are using line-in microphones, choose Audio inputs > Device > line in. In this case, the audio from the microphone source is sent to the far end and is not played out through the device selected in Audio outputs. For more information, refer to ‘Using the line-in connector’ in How to install GT Mini 3330.

  • Gain: Using this setting alters the gain on the line-in connector on the Group Telepresence system
  • Disable ECAN: This setting, when selected, disables echo cancellation. Do not disable ECAN unless you have specific cause to do so. Only disable ECAN if you are using additional equipment to suppress the loudspeaker signal on all microphone signals

Line out

Use this setting to adjust the audio gain on the line out from the Group Telepresence system. This might be necessary to adjust the volume where you have connected external speakers to the line out connectors.

Pink noise test tone

To help with the calibration of audio peripherals when you are installing the room system, you can play a pink noise test tone on a Group Telepresence system.

When the Group Telepresence system is installed, use the touchscreen controller to play the noise. Hold down the home button and press 28346 (this spells AUDIO).

The Group Telepresence system plays a test tone for 60 seconds, or until the home button is pressed again. The test tone is at a level of -20dBFS RMS. The volume controls in the Portal, or the gain settings of external equipment, can be adjusted to calibrate the SPL of the test tone.

When you play the pink noise, the volume resets to default.