First show I ever did, using a big pedalboard for the first time... and no sound from the amp. Must be patch cables right? Nope. Pedal turned down or not powered? Nope. Amp off? Nope.
I found an old video of the Digitech PDS 20/20 and i noticed an AWESOME very mellow and lush flanger... of course the settings are not visible in the video and i didn't write it down