Hi
If you unlink the audio from your clip, it drops down to a lower track where it becomes a separate audio clip. You can move it about,and manipulate it as an independant sound clip. The video clip from which you took this audio can be removed from the sequence without affecting this sound clip on the lower track.
Also, as an alternative, If you right click the video clip in the Media list window you can save the audio as a separate sound file.
If you have unlinked your audio it will remain in position even if you insert more video clips, but obviously active sound on the soundtrack will move right.
It is probably best if you are doing a lot of sound manipulation and expect to have to add further video or sound clips, to unlink all the sound first (or mute the clips). Unfortunately VP 2.41 will not link a row of sound clips together so they can be moved en masse and remain in synch with themselves in the event that you add further film clips. If you do insert then each individual sound clip will have to be re-positioned individually, which is a decided drawback.
Nat