where come they from

photo: 

you may have noticed some weird and annoying noise coming from my channel at the jams lately...they come from this pedal's array,connected in a closed loop,causing them to go feedback,then i take the signal from one of the analog delay's twin output....ive taped them to an old yamaha rythm machine,that i can connect to the pedals too but its there mainly for its strap facilities, so i can go like a guitarrist lol