Getting rid of hiss/ hum

[Wandering Kid]

but all the access virus models can only accept unbalanced connections?

using balanced connections shouldnt solve anything because you will get no benefits from them. For ten's problem i imagine his unbalanced cable runs were just absolutely horrific.

could it be the global input level on the synth? try it on the access virus by going into the CTRL menu and increasing the input global parameter to maximum. notice how everything becomes hissier and the LFOs actually emit an audible high pitched squeal around 8000 hz.

on my virus b i have never really been able to get rid of the hiss or the squeal completely, even with this parameter on 0, althoguh it is greatly reduced than when it was on 127.