markw4, feels like you're looking for a specific answer. If you make a suggestion or point me toward a resource so that I can learn, I would be happy to absorb that.
Well said AnthoneyWell Mark... then it will be worthless
I will be scoping the circuit with different op amps as well as measuring DC offset before we listen to them to check for stability / clipping / oscillation / etc etc as per the Mooly thread I linked above
I am not a senior DIY member, I am here to learn, listen, and have fun. This project is about me learning how to read spec sheets, learning how op amps behave, and having friends over for a good bowl of pasta (gnocchi preferably). I am introducing a level of blindness into the test for fun, but to your point even then anyone reading this thread should not take that as rock solid empirical collection. It is what it is - couple of folks getting together and tinkering
Good idea. Maybe we'll run a test tone and meter it, that would be more accurate that an app I'd guessSomething that may help with even a casual listening test is a simple db level setting, to take that variable out. A phone app would be better than nothing, just have the phone in the same location each time.