My two cents...
When I lived in California, I paid a sackload of cash to take a one-on-one course with a famous sound engineer (he does all the music for Disney, and a few other biggies).
It was seriously mind-numbing, but one thing I did learn was how to properly slice audio so there is no pop sound. Basically, you have to identify the tiny point on the timeline where the sine wave goes to zero. If you
have a stereo track, it's a little harder but still doable since you have to find the spot where the sine wave hits zero on both channels. BTW, by Zero I mean the horizontal center line that the sine wave goes above and below to produce sound.
Good info, but poor “finding zero point” editing is not the problem we are facing here. The problem is the worst with key framed audio. Let’s say you are cutting in an interview and you want the words to start at a given point in the dialog, but you want to fade the video in leading up to that point. You go into the audio and you keyframe the audio so that it begins with silence, then comes in at a specific word. Now you put that clip on the timeline behind another clip with or without a transition. What you’ll often get is a momentary blip of full audio right at the beginning of the added clip where the audio plays full on right before the keyframe kicks in and mutes it. It’s easy to fix. You just separate the audio and move it to a different track, but we shouldn’t have to.
This was a bigger deal with the previous version of Luma Fusion because it didn’t have proper J-cut editing and you had to do this type of edit with key-framing the audio. It still is frustrating though and should be fixed. This particular bug has seemed to survive all the revisions and has been here a long time.
One added point is that LumaFusion will only let you cut audio on the exact video frame points, so it doesn’t really have the audio cutting precision one would need to cut on the zero points. 24 or 30 frames per second may be all right for video, but those are pretty big jumps in audio.