audio track framerate 25(PAL)-->23,976(NTSC) [duplicate]

here's my problem: I need to change the framerate of the audio track of one of my films from 25 to 23,976 fps (to mux it with a full hd version); I used to make use of handbrake, re-encoding the film at highspeed and changing the framerate, setting the audio at high quality This time, I'd like to change the framerate WITHOUT affecting the audio quality nor re-encoding with a different format.

Is there a way? (maybe ffmpeg?-->if so, please post the commands)

Please someone help me