Essentially, Vox Studio knows two generic groups of sound file formats: the multimedia formats (usually known as ".wav" files) and the telephony formats (often known as .vox files, but it can be anything you want).
Script file format
Bicom format
Centigram formats
Dialogic formats
Elan Informatique format
Group 2000 formats
IBM Directalk format
InterVoice formats
ITU-CCITT formats
Microlog Intela formats
Natural Microsystems (NMS) formats
NewVoice formats
Next and Sun formats
Nortel Generations formats
OKI file formats
Philips VoiceManager formats
PhoneBlaster formats
Raw PCM formats
Rockwell formats
SCII format
SoundDesigner II format (Mac)
Voicetek Generations formats
Windows Wave formats