Using ffmpeg to slice audio
ffmpeg -ss StartingSeconds -i inputFile.mp3 -t HowManySecondsToCapture -c copy outputFile.mp
Sample:
ffmpeg -ss 388 -i inputfile.mp3 -t 85 -c copy outfile.mp3
388 = Start at 6 minutes forty-seven seconds
85 = capture for one minute forty-two seconds
If the -ss option is not included, the slice will start from the beginning and capture the amount of time specified in the -t option. Example -t ten seconds, will capture from the start of the audio for ten seconds.
If the -t option is not included, the slice will start at the -ss point and complete to the end of the audio.