Recorded call (with authorization) _ inaudible contact

[Trebor]

… So, you hear my voice very loud and I barely perceive her. I tried to amplify his voice and reduce the noise with audacity but it still does not give anything audible … Can someone help me?

There is an Audacity plugin called LevelSpeech2 designed for that purpose: it only amplifies the quiet voice in the conversation, however it also amplifies the hiss noise, see …