Isolation transformers output voltage higher than wall

Thank you both as the information is helpful.

@erik_squires Does it make sense to place an isolation transformer between the AC receptacle and a Furman Pst-8 which has all my digital gear plugged into it?  Secondly, should digital that use LPS still be on the "digital side" with other switching supplies or separated from them? I'd be interested in your thoughts on this. Thanks!

It's a small compact plug-in meter with a display. My wall voltage does not drift much. It typically is 121-122 volts.

@carlsbad I always listen to music with which I am very familiar and if I sense the sound quality is compromised in any way then I won't use them.