[Asterisk-Users] Audio quality problem recording calls using gsm codec

[xlab]

When using phones that are using G.711 codec and the calls are recorded
with "Monitor", when played back the files sound great.

When we use gsm codec at one or both ends of the call, the recorded
files sound very bad.  Much worse than the audio sounds during the call.

With the "Monitor" command we have tried WAV, wav, and gsm and this does
not make any noticable difference, the sound quality is still poor
(actually about the same each way).

We have tried the following and get the same results:

Two different computers -
  P4 w/Intel mb, 3.0 GHz, 1GB ram
  Dell 2850 dual processor 3GHz, 3GB ram

Used latest Asterisk stable version, and latest CVS head. (Fedora Core 3)

Any help would be appreciated.  The goal is to have everything use gsm
to cut down the bandwidth some.

Note: We are also using MeetMe, and using the "m" option to record the
conference.  When this is done the quality of the audio is good even
when the phones are using gsm codecs.