My voyager makes a little noise even when I’m not pressing any keys, it’s like the signal is coming through slightly. I’ll switch presets and I can hear it just a little. I am playing through a crappy solid state state amp with a mf104z (wall wart plugged into a analog outlet on a monster power strip) not sure if that’s helping with the noise. Is this normal for a voyager to have the sound leak like that? Everything else is good, no crashes or anything abnormal. 
What kind of noise? The same tone from the oscillators or actual white noise? When the 104z is on it can be a little bit noisy.
Same noise as the oscillators I guess. Sounds like I’m holding down a key but it’s really low volume. I never noticed it before but my amp has is old as hell and is noisy.
What about on headphones?
Sounds exactly like me. Same problem. Can hear it only with the amp volume knob cranked though. Shitty solid state amp, just like yours. No leakage through the headphones. Could be normal I guess?
I’m going to try it through a DI tonight. Let’s see what happens.
Normal behaviour, DI doesn’t help.
I too have a high pitch noise, never have quite figured it out. My band did a 3 song demo late last year, and we used a DI…I don’t hear it on the recordings. Strange stuff, seems to be my Amp -Roland KC550