"Flatline" seems to only be a volume control No Copmression or Sustain??

[rosssurf]

I have been working on my "Flatline" for what seems like eterity. I have made many mistakes and recieved much help from this forum.

I am just not really hearing any compression or sustain.It end up after a good nights sleep I found that I had 47 Ohm resistor where I needed a 47,000 Ohm one. Slight differenece . I replaced the r with the correct value and then still got nothing, so I replaced my tl072 with a fresh one and all seemed well. But then I noticed seems I have just made a fancy volume boost control in black box with a prety Violet LED. I am not really noticing any compression or sustain at all. I have tried replacing the 220K resistor with ones from 1K all the way to 2.2M!! it just seems to be more or less of a volume booster, still no audible sign  of compression or sustain. I am using a VTL5C3 for my LED/LDR Is it possible having the wrong value R in there caused the tl072 to fail? or it could have been from me trying different wires all over the place.
Any thoughts?                     http://aronnelson.com/gallery/bcreekmur/flatline_compressor

[rosssurf]

Bump!

[johngreene]

It's most probable that there is something wrong with the rectifier/LED circuit. Check that the LED is wired in the right direction with respect to the other diodes. Measure the voltage across the LED with and without signal. It should equal the LED Vf when there is sufficient signal present.

--john