Dialgo Wave Modem ActiveX SDK Features Caller ID Extraction, Digit Monitor and Playback, Wave File Playback and Recording on Phone Line. You get to save your Wave File in 20+ Audio Formats. Inputs CCITT u-Law Compressed Wave Files for Playback. This compact telephony control reduces your development time by 4 months. More the Registered Version supports SAPI5.1 Text To Speech and Speech To Text on Phone Line.