TL072 based circuit generates loud noise
You have a feedback through the wet-dry circuit. That's an oscillator. The dry signal should have a buffer amp before it's fed to the wet-dry balance pot. It very likely would stop the signal going from output back to the input.
Others have already said there's no decoupling capacitors in the DC supply inputs of the opamps. That is a common unwanted feedback mechanism (=through the power rails) and can cause oscillation.