Cut Block to MP3 or WAV

First please set selection range to current opened audio file, you can drag a block or using set selection begin and set selection end button to indicate the selection range.

After you indicate the selection range, please click File->Save Block As on main-menu, and please set the output filename if you want to cut the selection to a wav file. If you want to cut the selection to a mp3 file, please click File->Encode MP3 on main-menu and set the output mp3 filename.