What you refer to as “passing” is simply a shift in awareness. We don’t actually “die” as the common interpretation of death infers. Depending upon the manner preceding this shift in awareness a person can experience different things. One could experience a brief blackout moment followed by this shift in awareness, it can be more seamless with this shift occurring gradually, or it can be a sudden shift in awareness like in the case of a pedestrian getting fatally hit by a car traveling at high speed.

Either way you will definitely find yourself in a different reality with vastly different properties. Me personally, I think it’s a way better reality, not that I have anything against wearing this meat suit but yea… you could say that your soul moves on. Sounds are better, colors are more vibrant and diverse. The colors actually have personality and a nature of their own and seem to interact with each other. 

Colors in this vibrational level blend together but that’s about it. In other vibrational levels colors seem to blend, play, and interact with each other. Sounds and music exist but since you aren’t relying on human faculties you can perceive a wider variety of sounds and octaves at once which gives you a fuller experience beyond comparison. 

I know you didn’t exactly ask me about colors or sounds but since this question has come up a few times before I try to add more insights each time I touch on the subject for those to whom it might benefit.

There is nothing to fear in relation to the whole “death” process. You’ve most likely done it many times, and when it happens you will feel a sense of familiarity with the process.