Open total mix and look to see if there’s anything clipping, also if you don’t have Totalyser then grab that too, it works standalone so you can use it to analyse any audio playback on your system independent of cubase etc… handy for keeping an eye on your levels post cubase/DAW.
What HARDWARE are you monitoring on, amp/speakers etc… if they are consumer units such as a hifi system then they will accept an incomming level of -10db whereas studio gear generally works at +4 or higher…
Also why are you working with 0dbvu? that’s WAAAAAAAAAAAAAAAAYYYYY too hot… that was fine for tape but not for digital systems… there’s no where left to go level wise.
Never mind what others are doing, their setups are most likely different to your own and it depends at what point in the production process they’re hitting 0dbfs.
If you are getting clipping then either you are pushing something too hot somewhere in your setup or you have a setting wrong somewhere… the most likely way of tracking it down is to look at it methodically eliminating one thing at a time… hence my questions.
it’s not a question of being WRONG no idea why you feel the need for that tone with someone who’s actually trying to help you… it’s clear not knowing your way around your equipment properly is your main issue here… i suggest you read some manuals first…