Will this DC-DC converter be good enough for a guitar pedal PSU?

Mornsun H1212LT-2W datasheet

I want to build an isolated power supply for a bunch of guitar pedals. My idea is to take an off-the-shelf power supply capable of providing 12v-18v at a few amps, then use a DC to DC converter for each pedal, in order to isolate them from each other. Most pedals do require 9v, so I will add another regulator before the output.

My main goal is to have the pedals isolated from each other to prevent ground loops and hum. I probably need isolation up to 50/60Hz as well, but I am unsure how important isolation at higher frequencies is.