Using the auxiliary ports on an HDL410 system

The Nureva^® HDL410 audio system features auxiliary ports on the connect module. They are used to send and receive audio streams from third-party devices. The auxiliary port options are found in the Nureva App (Devices) and Nureva Console (Settings).

Audio jack cabling

When using the auxiliary in and out ports it is recommended to keep the maximum cabling length to 6 feet. This maximum cable length is suggested to ensure minimum noise is coupled to the signal. Installing the third-party equipment next to the connect module will help avoid long cable runs and proximity to noisy cables. This will assist with keeping noise coupling from happening.

Analog device cabling

When an HDL410 system is connected to external analog devices, all connections are unbalanced 3.5 mm connections with a three-conductor tip ring sleeve. This type of connection can also be used with external microphones when using Adaptive Voice Amplification.

External microphone cabling

External microphone connections can be balanced or unbalanced, however the HDL410 connect module only supports mono inputs when used with external microphones. It is recommended to use a balanced cable for external microphone connections.

Adaptive Voice Amplification tuning for the HDL410 system

Auxiliary ports

Different auxiliary output modes can be selected for interoperability with different components. The table below outlines the voltage root-mean-square (VRMS) and gain for each port and the corresponding settings. The default signal is an echo-canceled microphone pickup with a maximum output level of 0.92 VRMS and a gain of 2.2 dBu.

The Nureva aux-in and aux-out connections are single-ended, unbalanced signals with default maximum output signals as shown in the table above. Using equipment that requires voltages below these levels may result in clipping, distortion and — in extreme cases — damage to connected systems.

Equipment that requires voltages above these levels will not be adequately driven by the Nureva audio system’s output signal. Using it may result in quiet or no audio on the channel. Before connecting to the Nureva connect module, make sure the third-party device voltage levels are adequate or adjusted properly by additional interfacing hardware.

Auxiliary out (mic level)

The mic-level auxiliary output contains the in-room microphone pickup that is echo canceled. In-room microphone pickup is also referred to as near-end or local audio.

Nureva App

The analog device must be added to the Nureva App before the auxiliary port settings can be managed.

1. Navigate to Devices.

2. Press the ⨁ button to add a device.

3. Select Other analog aux device and Output from the dropdown menus.

4. Select Mic level from the aux-out options.

5. Press the Add device button.

Once an analog device has been added, the Auxiliary out settings can be managed by opening the Devices page and selecting the desired analog device.

Nureva Console

When using Nureva Console to manage the auxiliary port settings, the analog device does not need to be added.

1. Navigate to the Room with the analog device being managed.

2. Select the HDL410 system.

3. Scroll to Settings and open the Auxiliary ports menu.

4. Choose Mic level from the aux-out options.

5. Click the Apply button.

Auxiliary out (line level)

The line-level auxiliary output contains the in-room microphone pickup that is echo canceled. In-room microphone pickup is also referred to as near-end or local audio.

Nureva App

The analog device must be added to the Nureva App before the auxiliary port settings can be managed.

1. Navigate to Devices.

2. Press the ⨁ button to add a device.

3. Select Other analog aux device and Output from the dropdown menus.

4. Select Line level from the aux-out options.

5. Press the Add device button.

Once an analog device has been added, the Auxiliary out settings can be managed by opening the Devices page and selecting the desired analog device.

Nureva Console

When using Nureva Console to manage the auxiliary port settings, the analog device does not need to be added.

1. Navigate to the Room with the analog device being managed.

2. Select the HDL410 system.

3. Scroll to Settings and open the Auxiliary ports menu.

4. Choose Line level from the aux-out options.

5. Click the Apply button.

Speaker out (line level)

The line-level speaker output contains far-end audio for playback on external speakers. The output is a mono signal and the system’s speakers are disabled. Near-end audio to the computer and far-end audio from the computer are sent by USB. For best results, the volume should be controlled from the computer and amplifier settings should be fixed.

Nureva App

The analog device must be added to the Nureva App before the auxiliary port settings can be managed.

1. Navigate to Devices.

2. Press the ⨁ button to add a device.

3. Select Other analog aux device and Output from the dropdown menus.

4. Select Speaker out from the aux-out options.

5. Press the Add device button.

Once an analog device has been added, the Auxiliary out settings can be managed by opening the Devices page and selecting the desired analog device.

Nureva Console

When using Nureva Console to manage the auxiliary port settings, the analog device does not need to be added.

1. Navigate to the Room with the analog device being managed.

2. Select the HDL410 system.

3. Scroll to Settings and open the Auxiliary ports menu.

4. Choose Speaker out from the aux-out options.

5. Click the Apply button.

Mixed signal (line level)

The line-level mixed-signal output contains both near-end and far-end audio mixed into one signal. With a mixed signal, hearing aid transmitters can send both the in-room and far-end audio to hearing aid devices. This setting can also be used with other third-party devices that require a mixed near-end and far-end audio signal.

Nureva App

The analog device must be added to the Nureva App before the auxiliary port settings can be managed.

1. Navigate to Devices.

2. Press the ⨁ button to add a device.

3. Select Other analog aux device and Output from the dropdown menus.

4. Select Mixed signal from the aux-out options.

5. Press the Add device button.

Once an analog device has been added, the Auxiliary out settings can be managed by opening the Devices page and selecting the desired analog device.

Nureva Console

When using Nureva Console to manage the auxiliary port settings, the analog device does not need to be added.

1. Navigate to the Room with the analog device being managed.

2. Select the HDL410 system.

3. Scroll to Settings and open the Auxiliary ports menu.

4. Choose Mixed signal from the aux-out options.

5. Click the Apply button.

Speaker reference

Speaker reference is a setting for the aux-out port for use with acoustic tracking cameras where a reference signal from the in-room speakers is required. Enabling speaker reference mode allows an acoustic tracking camera to use the in-room reference signal to cancel out the audio from the speakers so the camera does not track to the speakers.

Nureva App

The analog device must be added to the Nureva App before the auxiliary port settings can be managed.

1. Navigate to Devices.

2. Press the ⨁ button to add a device.

3. Select Other analog aux device and Output from the dropdown menus.

4. Select Speaker reference from the aux-out options.

5. Press the Add device button.

Once an analog device has been added, the Auxiliary out settings can be managed by opening the Devices page and selecting the desired analog device.

Nureva Console

When using Nureva Console to manage the auxiliary port settings, the analog device does not need to be added.

1. Navigate to the Room with the analog device being managed.

2. Select the HDL410 system.

3. Scroll to Settings and open the Auxiliary ports menu.

4. Choose Speaker reference from the aux-out options.

5. Click the Apply button.

Auxiliary in (line level)

The signals from the auxiliary-in port contain audio for playback to the room. They will get mixed with any signals from a USB audio source.

Nureva App

The analog device must be added to the Nureva App before the auxiliary port settings can be managed.

1. Navigate to Devices.

2. Press the ⨁ button to add a device.

3. Select Other analog aux device and Output from the dropdown menus.

4. Select Auxiliary in from the aux-out options.

5. Press the Add device button.

Once an analog device has been added, the Auxiliary out settings can be managed by opening the Devices page and selecting the desired analog device.

Nureva Console

When using Nureva Console to manage the Auxiliary in port, the analog device does not need to be added. The Auxiliary in port will be active once a device has been connected to the port.