The one you show is a Morse ID
idtalkover=|iwb6nil/rpt
because of the leading “|” symbol.
http://ohnosec.org/drupal/node/129
You *can* have it do an audio file (wav or uLaw) and you can record that file at whatever level you like..
http://ohnosec.org/drupal/node/142
http://images.ohnosec.org/app-rpt-audacity.pdf
Just remember that -6dB - relative to full scale on a WAV recording - corresponds to full scale inside of asterisk.
So a reduced level would be -9 to -12 dB FS
73
Ken
KE2N