Audio Settings (Devices)

This article describes the Audio Settings for devices running firmware version 7.1 or later. For description of older versions see Audio Settings (SIP) - older versions

From the Audio Settings page one can set loudspeaker volume, enable various audio signal processing feature and more.

Accessing the Audio Settings page

How to access the Audio Settings page depends on the mode of operation:

• Edge mode: Edge Configuration > Audio Settings
• SIP mode: SIP Configuration > Audio Settings
• ICX-AlphaCom mode: Advanced ICX-AlphaCom > Audio Settings

Available settings depends on device type and whether or not accessories are selected. More options become available when enabling Advanced Configuration mode.

Normal Mode

"Normal mode" is the default view in the device web interface. One can set the level of the internal loudspeaker, as well as Line Out level and the output level on any accessories connected (e.g. handset, headset or external speaker).

In addition one can enable Automatic Gain Control (AGC), Active Noise Cancellation (ANC) and Automatic Volume Control (AVC). Not all these features are available for all types of devices.

Audio Settings - Normal mode

• The available volume range for the loudspeaker depends on the intercom/device type. See this table for details.
• When the loudspeaker volume is set to 0dB (default) it will produce a nominal loudspeaker output of 65 dBA at 0.5 meter distance.

Devices in ICX-AlphaCom mode

When a device is used in ICX-AlphaCom mode the following settings are controlled by the ICX-AlphaCom server, and configured from AlphaPro:

• Internal Loudspeaker volume
• Automatic Noise Cancellation (ANC)
• Line Out level

These settings should not be changed in the device web interface, as they will be overwritten by the settings done from AlphaPro.

Volume settings controlled from AlphaPro

Advanced Configuration Mode

When selecting Advanced Configuration mode in the top right corner of the web interface, the Audio Settings page will change, and is divided into the following sections:

• Audio Outputs
• Audio Inputs
• Audio signal processing
• Other Audio Related Config (available in ICX-AlphaCom mode only)

Audio Settings - Advanced Configuration mode

Audio Outputs

Available settings depends on device type and whether or not accessories are selected.

Audio Output settings - Advanced Configuration mode

• Internal Loudspeaker: The value in the left field ("Gain") sets the regular volume. The value in the right field ("Override Gain") sets the volume when the Volume Override feature is active. For details, see here (Edge) and here (ICX-AlphaCom).
• On Turbine devices the "audio source" for playing in the speaker can be selected:
  • Main Audio Line: Play audio from VoIP signal (default)
  • Pure Line IN Signal: When the device is in idle play audio from the Line IN input. When the device is in a call, play audio from the VoIP signal
  • Pure Line In+GPIO: When the device is in idle play audio from the Line IN input if Input 6 is active. When the device is in a call, play audio from the VoIP signal
• Handset Loudspeaker: Sets the level for regular volume (left filed) and Volume Override (right field). This setting appears only when Accessories = Handset (or Headset) is selected.
• Line Out: The value in the left field ("Gain") sets the regular volume. The value in the right field ("Override Gain") sets the volume when the Volume Override feature is active.
• Additional options available when "No Accessory" is selected:
  • Main Audio Line: Play audio from VoIP signal
  • Pure Mic Signal: Audio from microphone without any signal processing
  • Processed Mic Signal: Audio from microphone with signal processing

• Selective PA: Used for special application. Leave it disabled.
• Force Loudspeaker Ringing: Enable the ringing signal from an incoming call to be heard in the internal loudspeaker if a headset, handset or external loudspeaker is used.

Stations with option for External Loudspeaker:
The IP Flush Master, IP-CROR and the TFIX-V2 series of stations have an additional output for external loudspeaker. This loudspeaker output needs to be enabled from the web interface, and volume can be configured separately from the internal speaker:

External Loudspeaker configuration

Audio Inputs

In this menu you select the input gain for the internal microphone.

Do not touch the "Internal Microphone Gain" for "known products". This gain is calibrated for given products to avoid in clipping or feedback from loudspeaker to mic, and to produce a "nominal voice signal" with talker at "nominal distance". The microphone gain configuration is mainly intended for Kits with unknown microphone or fine tuning/calibration of component variations in known products.

If the device has headset or handset connected, the gain from this microphone can be adjusted separately:

Audio Input options in a Desktop station with handset

On devices with Analog Line In option (e.g. TKIE kit), you can choose to use the microphone or the Line In as input source (only when "No Accessory" is selected):

Audio Input options in TKIE kit - The microphone is disabled when the Line In is enabled

On devices with a digital MEMS microphone (e.g. TCIS and TCIV+ stations), one can choose to use an external electret mic instead.

Audio Input options in TCIV+ station

• Electret Mic: Use an electret microphone connected to the the analog mic input instead of the digital microphone.
• Digital Mic (default): Use the built-in MEMS microphone

There is also an option to switch between the internal digital mic and an external microphone by activating an input. This makes it possible to connect a handset or headset to TCIS/TCIV+, and connect the hook-switch of the handset to the input. One can choose which input to use for the hook-switch.

• I/O Pin A>D Switch: When the input is triggered, the analog mic input (e.g. handset) is enabled. When the input is not triggered, the digital mic is enabled. The input must be configured as "Input" in the IO Settings page.
• I/O Pin A>D Switch (until call-end): When the input is triggered, the analog mic input (e.g. handset) is enabled. When the call is ended the digital mic is enabled.

Switch between analog mic and digital mic by input 5 (= hook-switch). Mute the loudspeaker when the handset (= analog mic) is in use

Audio Inputs

• Audio Inputs[Show/hide]

• 

  Audio Inputs

  
  

  Item	Sub Item	Description	Range	Default	Accessory
  Internal Microphone		Adjust the microphone gain level	-10 - +10 (dB)	0	No accessory Handset w/offhook Handheld microphone Headset w/autodetect
  Line In
  Gain		Adjust the Line In gain level	-10 - +20 (dB)	0	No accessory
  Activate
  	Not Connected Line In 1 vrms	Line In not in use Line In is active input		Default
  Handset Microphone		Adjust the handset microphone gain level	-10 - +10 (dB)	0	All Handset modes
  Headset Microphone
  Gain		Adjust the headset microphone gain level	-10 - +20 (dB)	0	All Headset modes
  Activate
  	Electret Mic Dynamic Mic	Electret type microphone in headset Dynamic type microphone in headset		Default

Audio Signal Processing

• Audio Signal Processing [Show/hide]

• 

  Audio Signal Processing

  
  

  Item	Sub Item	Description	Range	Default	Relevant device(s)
  AGC (Automatic Gain Control)					Turbine
  Enable AGC		To be used with caution and in special conditions where Near-End talker may be operating in varying distances deviating from the nominal talker distance to the station		Disabled
  AGC mode
  	Digital SW AGC Analogue HW AGC (quiet profile) Analogue HW AGC (noisy profile)	For majority of use cases Analogue HW AGC is used only for analogue microphone, and basically for "Push to Talk"/"Talk back" applications and not in Open Duplex modes.		Default
  AGC gain profile Only for AGC mode Digital SW AGC
  	Standard Moderate High Very High	The target signal gain level. "Standard" shall aim to keep a "nominal voice signal level at approx -23 dBFS. The other options will target increasingly higher signal levels. Use with caution.		Default
  AGC speed Only for AGC mode Digital SW AGC
  	Slow Fast	Attack and decay rates of the algorithm		Default
  AEC (Acoustic Echo Cancellation)					All
  Enable AEC		Tuning of the AEC algorithm in levels		Enabled
  AEC mode
  	Low Moderate High Half Duplex	See separate article {link here}		Default
  ANC (Automatic Noise Cancellation)					All
  Enable ANC		Tuning of the ANC algorithm in levels		Enabled
  ANC mode
  	Low Moderate High Very High	For most scenarios the "Low" works best. Higher levels will reduce noise levels more, but also may produce significant impact on the Near-End talker signal quality.		Default
  FESS (Far-End Signal Squelch)					All
  Enable FESS		Squelch algorithm silencing the signal level below threshold. Main use case is external interface input like signal from a Radio Systems where there is fixed noise level on signal when no voice activity.		Disabled
  FESS Threshold		Silence signal if RMS energy of a 100ms sampled frame is less then this level	-92 - 0 (dBFS)	-60
  FESS Activation Delay		If signal is silenced use this delay before opening up again (to avoid fast squelch on/off)	0 - 1000 (ms)	100
  Loudspeaker DRC (Dynamic Range Compression)					All
  Enable DRC		Noise Gate with Gain option		Disabled
  DRC Gain		Signal gain to apply on "nominal voice audio levels"	-0 - 20 (dBA)	0
  AVC (Automatic Volume Control					All
  Enable AVC		Volume is adjusted according to the ambient noise level		Disabled
  AVC Advanced Settings		Enable to show advanced options		Disabled
  Advanced AVC Enabled:
  Lower Threshold		Threshold level for AVC start working	30 - 80 (dBA)	65
  Upper Threshold		Threshold level for AVC stop working	80 - 120 (dBA)	100
  Attack Rate		How fast gain is raised when ambient noise level is increasing	1 - 100 (dBA/sec)	10
  Decay Rate		How fast gain is reduced when ambient noise level is falling	1 - 100 (dBA/sec)	10
  Hysteresis		Required mic-signal change level before new gain adjusted. This is applied when change in gain directions	1 - 10 (dBA/sec)	3
  Far-End Lockout Time		Time for successive frames after AVC lock, due to far-end active or optional high near-end signal, before commencing AVC adjustments. A negative sign locks AVC if signal above upper threshold	1 - 100 (100ms)	10

New default settings

IP Intercom

The IP-station audio output has been normalized based on ITU recommendations. The input signal which is used for the output measurements is an ITU Voice Signal with an average RMS energy of -23 dBFS. Output levels are measured at a distance of 0.5 meter. The actual SPL of the IP-CROR station is 3 dB lower than indicated in the table below due to the covering of the speaker grill with a foil.
Kit output levels are based on the same speaker arrangement as for the comparable station.

Product family	Gain range
	Minimum	Default	Maximum	Override maximum
TCIS/TICV/TCIV+/TKIV+/TKIS	-10	0	+13	+23
TFIE/TKIE	-10	0	+18	+28
TMIS/TMIV+	-17	0	+4	+14
ECPIR	-17	0	+4	+14
TFIX	-10	0	+3	+4
TFIX-V2	-10	0	+3	+4
IP Desk Master (100840xxxx)	-8	0	+16	+18
IP Flush Master (1008431000)	-14	0	+10	+12
IP-Station, Clean Room/OR (1008415000)	-14	0	+10	+12

IP Speakers

The IP Speaker audio output has been normalized based on ITU recommendations. The input signal which is used for the output measurements is an ITU Voice Signal with an average RMS energy of -23 dBFS. Output levels are measured at a distance of 1.0 meter

Product family	Gain range
	Minimum	Default	Maximum	Override maximum
ELSII-10WM	-10	10	+16	+17
ELSIR-10CM	-10	10	+16	+17
ELSII-10HM	0	10	+29	+30
ELSII-10LHM	0	10	+35	+36
ELSII-10PM	-10	10	+13	+14