How can I extract Vocal sound from original song?

I saw a wonderful program on the internet. The program's name was "utagoe". That helps extract the vocal sound from original song.

So there is a supplies to extract a vocal sound from original song.

1. AR(All Recorded) - It means All sound. Just original song.

2. MR(Music Recorded) - It means just Intrument's sound. So we call this version with MR or Off Vocal version, Instruments etc.

So I put the AR file and MR file on the "utagoe" program, it perfectly extract the vocal sound from song.

"utagoe" requires wav format so I think this program uses the simple solution.

There is two wave AR and MR.

Subtract MR's wave from AR's wave. So We can get just Vocal's sound.

I think you can understand about this.

So what I want to ask is, "Is there a similar feature in the Adobe Audition?"

I have a AR file and MR file. How can I extract the vocal sound from the song with Adobe Audition?

"utagoe" requires only wav format and we can't use the flac file. You know, flac file is more high quality file of audio and if I make a vocal sound with flac file, it will be more clear vocal sound.

How can I do??