
I wrote a short article about using the LM358 for audio. It is in the Lab Notebook.

I wrote a short article about using the LM358 for audio. It is in the Lab Notebook.
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Jack Orman has been involved in FX design and construction since the mid-1970s.
A couple of quick notes about the testing of this circuit.
I also tried the TL072 chip but forgot to save the results. It was similar to the 5532 and 4558.
At one point I put an LM4562 chip in the socket and it would not work. There seemed to be an oscillation problem. I switched it out for an NJM4562, which did work and had VERY slightly better performance than the 5532.
In the course of testing, I tried various other dual op amp chips but none were different enough to include in the article.