When I insert VST Amp Rack in an audio track with preset “!Empty” I get a noise (guitar not connected). I think this noise comes from the amplifier within the VST Amp Rack. Because when I choose another amplifier the noise sound changes.
Well, to me this sounds rather normal for a guitar played via an amp. The noise coming up as the signal decays indicates a probably quite hard compressor setting - checked that already…?
The not connected files are with input monitoring on, or off?
I am not sure if I am using the proper technical words in English
Your Daw and audiochain is powered by electricity, obviously.
The socket that you plug in to for power, does it have two or three contacts for joining?
If it only has two, your system has no connection to earth mass, as I call it. It is used to get rid of static electric fields which can cause a terrible hum in electric guitar amps and other audio systems.
But I must admit that the hiss I hear on your recording is probably just something you have to take for granted when you are dealing with an electric guitar. Use a noise gate to get rid of this.
I loaded the amprack here with the preset into an empty track, with input monitoring enabled, and - the noise itself “sounds normal” - same here. What I can´t judge is the signal to noise ratio of your setup, and how much gain you need to apply to your guitar, and the used guitar pickups - But IMHO, this is more or less “normal”.