533soft.com Mp3 Recorder records any audio source from your computer to MP3 or WAV audio directly. Recording source is from sound card that means any sound through your sound card would be recorded. When the Mp3 Recorder recording, the saved MP3/WAV file's size is calculated and showed at real time. Mp3 Recorder records your computer's audio streaming into MP3 file directly without temporary WAV files generated. Many useful features include channels, sample rate, bit rate, voice control system.