The recordings on my Cardserver is soft

[Belinda Frick]

Gaining Recording Volume on Recording Cards

DP : Available
NGX : Available
LDA : Available

Background:

• Recording cards:
  
  
  1. LDA:
     
     In the past we have had soft recordings on an LDA (Analogue Cards). This was attributed
     to incorrect wiring and was corrected by swapping the wires. For wiring on the LD see
     How do I connect the Analog card to record the extension/line/radio
     
     ALSO SEE: My recordings are very soft with a beeping sound coming through every few seconds
     
     
  2. NGX:
     
     Does support the Gain control.
     
     
  3. DP:
     
     On digital (PRI) the only reason why the call can be soft is if the source is soft.
     There is no loss of volume on transmission through digital equipment.
     
     We can turn on Automatic Gain Control (AGC) but the client must be aware that
     the sound could be distorted if it is turned to high.
  
  
• AMETHYST: AMTCards
  
  AMTCards will record what it receives from the channel. Therefore if the
  channel is soft, the recording will be soft. If your wiring is correct and
  recordings are still soft, then you can try adjusting the GAIN on that channel.
  Investigate to find which channels is soft.
  
  You can set the gain per channel.
  
  The Gaining must be set in the AMTCards.ini and NOT in the AI-LOGIX software.
  
  AMTCards.ini (please note this has not been released):
  

  Code: Select all

  [VOLUME]
1_11=12
[GAIN]
1_11=12

  
  
  'Volume' is for output. 'Gain' is for input. We will not use volume, since we're
  not outputting anything on the channel 1_11(in this example). 12 in this case is
  12dB. It can range from -50dB to 24dB. -50dB is equivalent to muting the channel,
  and 0dB is the current setting. dB isn't linear though, so we might end up using
  something like 22dB where 21dB is too soft. You cannot use negative values.
  
  Note that in this example the value 12 will be used for incoming and outgoing.
  You can allocate and individual value by using the format 1_11=12_18. The value
  allocated to incoming/outgoing will depand on the wiring. To test which is for
  example outgoing, set 1_11=0_18 and make an outgoing test call. Then change it to
  1_11=18_0 and make another outgoing test call. With the 2 test calls, the recording
  with clear sound will have '18' represents outgoing. Now use this to do your
  individual gain setting for incoming/outgoing per recording channel.
  
  When changing the GAIN in the AMTCards.ini, we suggest to do it outside office
  hours. It involves stopping the recording service, doing testing, etc. This can result
  in recording being cut, new recordings not starting!.