I've been meaning to pose this question for a month or so. A guy who downloaded my New Year's recording of Derek Trucks Band has raised questions about phase inversion.
I'd like to get some thoughts and have attached the waveform.
He writes: "As you can see the unaltered left and right waveforms look like mirror images of each other. This means: there is a strong center (good), and that the phase is inverted between them. I have a hunch the left channel has correct absolute phase, but there is no way to know that for sure."
From top to bottom, the waves are:
1. unaltered, Left
2. unaltered, Right
3. unaltered, Left
4. inverted, Right