What's new in this version:
Version 4.0: 1) Now supports full audio formats, from 40KHz to 192KHz, 8bits to 24bits; 2) Fixes a major bug in sound recording, which sometimes caused the wav header unreadable for some audio players; 3) Creates recording files with a time unique name. 4) Improves driver performance; 5) Fixes a driver installation issue. 6) Optimizes GUI. 7) This version also internally integrated a MP3 sound recorder to reduce the recorded filesize.