rafaelrosafu

Step by step

0. Record the audio with Skype Call Recorder
1. Save a copy of the audio file in a temporary directory
2. Open the file in Garageband
3. Remove extra audio from the beginning and the end
4. Delete any problems in audio
5. Apply the Compressor filter (manual config, threshold: ~ 30 dB, ratio: 30: 1, Attack: 10ms, gain: 4dB)
6. Export to AIFF (uncompressed)
7. Open the file in Audacity
8. Use the filter Truncate Silence on the whole file (Level: -30dB, duration 0.3s, truncate to: 0.15s, compression: 50)