I finally found the reason for this noise. Because some instruments need to be superimposed in this accompaniment audio file, there is an original audio track of this music in this project. I listened carefully to this noise, and it feels like an intermittent fragment of the original sound. Now , as long as I delete the audio track of the sync overlay, the noise will no longer appear, muting the audio track does not solve this problem, it must be deleted,,,, well, this should not be my problem
I created a new project again to try to reproduce this phenomenon, but it was unsuccessful. It only happened once in an occasional situation, and there was no noise after that. Does it happen when the load is relatively heavy? Recall that this situation should be similar to the working situation before. It is necessary to superimpose some musical instruments in some accompaniment audio files, and then there is a crackling noise
6.mp4