Each plug in the chain is connected internally to all the others going from one plug to the next so current and ground are shared between each plug.
Daisy chain pedals noise.
Let s define the terms.
A daisy chain allows you to connect and power multiple guitar pedals from one power supply.
Creating a daisy chain for your guitar pedals is easy but there are a few things you need to get right or you risk burning out your power supply and adding noise to the signal.
Take note of what kind of undesirable noise you are experiencing from your rig.
If you suspect it is then try removing the power source from the mix and run all your pedals on battery power so they are isolated from ground.
Is it a hum when all your pedals are plugged in to your power supply or daisy chain.
You must always use an isolated power supply or multi output supply with isolated outputs like our zuma or ojai power supplies to avoid any additional noise in your audio.
Powering with a daisy chain or multi output power supply that shares its current across the outputs will result in a high pitched noise at the output like you describe.
Multiple pedals are hard enough to manage from both a cabling and settings perspective the last thing you want is the power supply affecting your sound signal as well.
Whether any one user hears noise with any pedal chain depends mainly on whether a ground loop has leaked noise into the audio path.
Using a daisy chain psu doesn t mean there will be noise but it opens up more avenues for noise issues to occur.
In our case an effects pedal daisy chain is a wiring scheme where multiple pedals are wired together in sequence from a single source of power.
A daisy chain is a supply with one main power module and a string of plugs.