I no longer have Audio Highjack as I don't do enough audio capture to make it worthwhile, but IIRC from several years ago they used to have automatic tools for dividing an input stream into individual clips. They were not 100% accurate, but close enough for most purposes. Are you sure you aren't missing something buried somewhere in the settings?
If we knew what it was we were doing, it wouldn't be called research, would it?
