wine from matrix with octoscroller control

[starsman20]

This might not be controls related.  I moved my show inside and got my matrix running so I could post notes to my better half.  I noticed that when it is running a sequence there is a high pitched whine now.  I don't recall hearing it before and the weather got to single digits so the whole thing was very cold (but always worked).  Do the panels make any kind of noise?  They are P5 in a 4 wide by 2 tall configuration. Came from one of the  standard vendors, I don't remember exactly where i got them.  It might be the power supply but I have never had one make this kind of noise before.  TIA.

[k6ccc]

I have my P5 and P10 matrix panels in my family room during the off season - for testing.  I have never noticed any noise.

[Poporacer]

Do the panels make any kind of noise? 

I highly doubt the panels will make any noise, but it is very common for the fan in the power supplies to make noise and depending on the power supply, the fans can turn on or off and even change speeds depending on the needs pf the PSU.