The Aspect (previously Voicetek) file formats supported by Vox Studio are formats with a file header. The usual extension for Aspect (Voicetek) formats is ".vsn".
You can select from the following coding types:
32 KBps OKI ADPCM at 8 KHz
24 KBps OKI ADPCM at 6 KHz
A-law PCM
Mu-law PCM