Have you ever put the LM324 to use this way?

[Mark Hammer]

In his Stompbox Cookbook, Nicholas Boscorelli uses the LM324 quad op-amp to use in an unusual way, that he describes below.



Here's the circuit.


 A very counterintuitive use of the chip, and approach to distortion.  Have any of you used it in this manner or built the Distort-o-Matic IV or simply tried one somebody else built?  I'm curious about what it does or doesn't add.

[ElectricDruid]

Never tried it, but it sounds like a good way to add plenty of hiss. At least the signal is boosted before it goes through, so there's some management of S/N.

[StephenGiles]

Yes I breadboarded this 2 leaking heart valves ago, and the hiss sounded great through an Electric Mistress!!

[Mark Hammer]

Yes I breadboarded this 2 leaking heart valves ago, and the hiss sounded great through an Electric Mistress!!

Fortunately, containing hiss is easier, less costly, and less painful, than containing heart-valve leakage! There are many points of potential intervention in this multi-op-amp circuit to trim cumulative hiss with feedback-loop caps.  Of course, almost any flanger will make hiss sound fascinating.  (Stay well, Stephen.  I'm hoping to get back out your way, maybe next year.)

[StephenGiles]

Hopefully see you next year Mark!