(Question) Interpreting phase about pactools

[TomDLT]

Could you clarify how to interpret the driver phase? In the driver waveform, I believe 0 degrees corresponds to the peak, 180d is the trough, -90d is the rising zero crossing, and 90d is the falling zero crossing -- is this correct?

Correct. You can see an example at https://pactools.github.io/auto_examples/plot_phase_delay.html#sphx-glr-auto-examples-plot-phase-delay-py

If so, why is this the case, instead of 90d corresponding to the peak, and -90d corresponding to the trough, as phase is normally interpreted for a sine wave?

It corresponds to a cosine instead of a sine, and this choice is arbitrary.

[mgm248]

Perfect, thank you for clarifying!