Howto:Adjusting volume parameters on IP111 and IP112: Difference between revisions

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* IP111 with V11r1 and above
* IP111 with V11r1 and above


==Problem==
Tweaking internal gains in the audio processing chain of the IP111 is considered harmful because it assumes a fixed implementation. But the implementation cannot be kept static and may need changes at any time. Therefore support for these parameters is ceased. Please open a support ticket if your environment needs special audio considerations.
* Customers might need control over the microphone sensitivity to lower background noise pickup
* Customers might need higher speaker volume of handset or loudspeaker than configurable on the phone
 
==Summary==
The microphone sensitivity of the handset can be controlled with a sequence of commands along the lines
 
  <nowiki>http://ip-adress-of-the-phone/!config add AC-DSP0 HANDSET /ADC_Gain 21</nowiki>
  <nowiki>http://ip-adress-of-the-phone/!config activate</nowiki>
 
Presently 21 is the default. Decreasing the value by 4 decreases the sensitivity by 6 dB. The allowed range of the ADC_Gain parameter is 0..31. The same command can be applied for speakerphone mode with name SPEAKER instead of HANDSET.
 
Higher speaker volume can be achieved by a command
 
  <nowiki>http://ip-adress-of-the-phone/!config add AC-DSP0 HANDSET /Coder_Output_Gain 34,32,30,28,26,24,22,20,18,16</nowiki>
  <nowiki>http://ip-adress-of-the-phone/!config activate</nowiki>
 
where each value of the comma separated list (default shown) corresponds to one of the volume steps. Decreasing each by 4 increases the volume by 6 dB. The permitted range of the values is 0..63. The same command can be applied for speakerphone mode with name SPEAKER instead of HANDSET.
 
<span style="color:red">
'''To avoid hearing damage, please be careful with the values!''' Increase the values step by step. You hear the difference after the !config activate</span>
 
<span style="color:red">
Clipping may occur for high audio levels from the peer if the speaker volume has been increased.
</span>
 
If you are satisfied with the settings, type:
  <nowiki>http://ip-adress-of-the-phone/!config write</nowiki>
 
Now, the values are stored in the config.
 
Please note, that the default values might change without notice in future DSP code updates and also the actual sound pressure corresponsing to these values might change. Please re-evaluate tweaks after firmware update and assert the commands above again.


==Related Articles==
==Related Articles==

Revision as of 18:11, 16 June 2016

Applies To

  • IP111 with V11r1 and above

Tweaking internal gains in the audio processing chain of the IP111 is considered harmful because it assumes a fixed implementation. But the implementation cannot be kept static and may need changes at any time. Therefore support for these parameters is ceased. Please open a support ticket if your environment needs special audio considerations.

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