Yes I corrected myself in subsequent pics. As you can see I have pin number 1 going to pin number 11 and pin number 3 going to pin number 12.
Well I routed in to out directly on both 1 and 2 in/out, but the issue persists. It seems it's not this chip at fault. But as I said, headphone out works perfectly. The RCA out also works, but it's like -30 or even more dB below 1VRMS or whatever it's supposed to be.. maybe the last op-amp is burnt. I'm not an expert at this so my guesses are limited.
Yes. But I no longer suspect that chip. Circumventing the chip didn't work. On top of that, why would I have -30 or -40 dB in the first place? Something ain't right, but I can't figure out what. Would the headphone amplifier have separate op-amps from the line out op-amps? If so, then line out final stage might be burnt, because I might have accidentally applied high voltage to it, I'm not sure to be honest, but my experimental amp was connected and it's all over the place tbh, it's a work in progress so I'm using it to test various transistors and arrangements.
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Could anyone help me understand what is going on here? Are these four op-amps going both to line out and headphone out?
Again, my headphone out works perfectly at both gain settings.
Again, my headphone out works perfectly at both gain settings.
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