@cundare2 The usual suspects (Fluke, etc.) make very expensive power quality analyzers. There are some EMI/RFI to audio toys made by a couple of people just for the audiophile crowd.
In the middle of the actually useful pack is a digital oscilloscope with the right probes. I found the frequency measurement features in mine to have been very difficult to use.
Lastly, you can build something that will let you input the AC to your audio jacks via a step down and isolation transformer/instrumentation amplifier. This is the cheapest solution that will let you use off the shelf PC scope software but requires the most amount of care in building to ensure you don’t electrocute yourself or your PC.