Please use “Normalize sample” in Sampler track after.
edit: Yes. There is no noise when dragging an empty midi part from VSTi track. The recorded noise must be coming from the inputs of the audio interface.
edit: That gave me an idea, that actually something is recorded, so I generated constant audio from a synth and dragged an empty midi to the sampler control tab as stipulated earlier.
The resulting sample: https://1drv.ms/u/s!AtbbTGcZOEa1hYhJ5m-cUlJIMhAqWg?e=eXPhef
edit: this is how the synth actually sounds https://1drv.ms/u/s!AtbbTGcZOEa1hYhK-9y44qpQPBkNxg?e=98aunZ
Mind you that it doesn’t matter, if there are any notes in the midi part or not. Cubase ignores them anyway and just records whatever is going into the channel at the time the sample is created and destroys the sample.