Update to Original post:
Thanks to input form other users, there is an issue with Cubase and 3rd party plugins adding noise that can be replicated by others.
Check below for some video and further descriptions of the issue.
Anyone else having this issue or can repicate it. Its not something that is instantly noticeable, so it can be happening to you without you knowing Have a check,
I’m having an issue where I see that a buzzing sound which is panned completely left is being added to Export - Audio Mixdowns in Cubase 9.
It happens only with certain plugins - eg Decapitor by Soundtoys. I understand this plugin generates “noise”, even when nothing is playing, and I can actually see this monitoring the channel using Voxengo Span.
BUT the buzz I get on Export is not the same. Its down about-135db, which though that is low, if I have a few of these, and some quiet tracks, its getting noticeable that get increased in volume when the final song is done. Critically, this “buzz” is not happening during play back prior to Export, but only in the exported audio wave.
Why do I get this buzz added - is it something to do with the Export function, or the plugin, and why is it panned hard left? Surely its not normal?
Has anyone else any experience of this or can replicate it? Try just one track in Cubase, a soft synth anything eg Zebra or Retrologue, and add Decapitator or any saturation/distortion plugin like Fab Filter Saturn or similar. Do you get the same thing happening? Note: it happens at quite quiet levels so in Span settings I’ve been putting the Range Lo right down to -180 to see it graphically, but even at default setting you can see it in numerical format on the Peak readings.