Modified and improved by AudioPro! Bypass/Repeat Hold, 2-second delay, VCO in, guitar/line level in. With variable gain limiter circuit. Modified for super echo fidelity- 6 to 10 repeats before soft break up. Grainy, lofi echoes are also possible. Modified low noise op amp and power supply. Dry out is effects loop into feedback when "Invert" is switch on! #7+ condition.