RECORDED files were not clear or have bad audio

hello guys,
i have problems with my recorded conversations, i reviewed the recording, all of them have very very bad audio quality, both wav and mp3 files.
i'm using Slackware 12.1, astguiclient_2.0.4.1rc2, asterisk 1.2.24, ztdummy, using 1000Hz timer frequency and system RAM disk for recording. I tested it for just only 1 Agent(manual dialing).
Hope somebody would advice me with my prob.
regards,
i have problems with my recorded conversations, i reviewed the recording, all of them have very very bad audio quality, both wav and mp3 files.
i'm using Slackware 12.1, astguiclient_2.0.4.1rc2, asterisk 1.2.24, ztdummy, using 1000Hz timer frequency and system RAM disk for recording. I tested it for just only 1 Agent(manual dialing).
Hope somebody would advice me with my prob.
regards,