Method 1: Effect-Stereo Audio Image-Sound Mixing-Selecting Vocal Clip.
New left channel (left100; Right-100) Create a new right channel (left-100; Right100; Inverse phase)
Method 2: Effect-Stereo Audio-Extraction of Central Channel-Karaoke (Effect Preset)-Male Voice.
After testing, this method works best in the fool style. )
Method 3: Edit-convert sampling type,
In the pop-up dialog box, select Mono in the Channel option.
Then set the left and right mixing ratios to 100% and-100% respectively.