[ajxs]

Author here: This is one reason why I used that term. I was definitely thinking in terms of the 'phase accumulator' looking up the sin table.

Everyone is absolutely right that this is the same as frequency. I think I was used that particular poetic flourish to emphasise how complicated the academic, mathematic explanation is, in contrast with the diagram. Quite likely I picked up that exact phrasing of "phase angle" from some academic literature in particular.

[joeberon]

> This is exactly why I used that term

That's a lie, because:

> I think I was used that particular poetic flourish to emphasise how complicated the academic, mathematic explanation is, in contrast with the diagram

is a totally different to what the person you are replying to said

[ajxs]

I've edited my post to clarify. It's a reason why I used that term. The second part of my post is not directly addressing what GP said. One of my aims in writing this article was to create something that could be interesting to read, with someone like myself as the target audience. Part of that involves using some artistic flourish.