Hello all! Hoping to get your input on a problem. I have a modded Arion SFC-1 Fat Chorus. The mods were by a previous owner, only differences I can notice are a volume knob and a button instead of the stomp box. It's worked great for a long time in a chain with 4-5 other pedals, but recently it started making a pulsing sound all the time that it's on. I can see the "check" light pulsing a little bit as well, getting a tiny bit dimmer every time there's an audible pulse.

Has anyone had a similar problem or know a solution? Or should I just take it to a shop?
Are you running it from a power adapter or with battery? Does it do it when its just plugged in? Does it do it with the battery? Both?
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