From all post under your question list, I guess you already know the answer of your issue. So here, let's me to share my experience of recording audio tracks from videos. As for recording audio from video and any vocal audio, the one I use is TunesKit Audio Capture, which can support multi-track audio grabbing. And it’s can keep or edit all original ID3 tags. Also it can save and record the recorded audios as MP3, AAC and other popular audio formats. If you would like to cut the unwanted segment and get a fascinating audio track, this audio recording software can do this well.
Hope this post can help you to solve you question freely.