I'm really open to this whole thing of double time resolution thing but I think mechanically & mathematically there is a deception of what's actually going on.
You say: "One bar of a 90 BPM beat will need to be spread over 2 bars if recorded at 180 BPM. 2 bars will have double the ticks of 1 bar."
You also say: "the point of doubling the BPM is not to actually double the BPM of your beat, but to give you more ticks to work with."
Well, mecanically & mathematically that is not possible.
There are the same number of ticks in one bar at 180BPM as there are at 90BPM. The ticks are not stretched over two bars if you double the BPM, just as they are not halved if you decrease the BPM to 45BPM from 90BPM.
What actually changes is the
rate at which the ticks are generated. The key is the tempo.
The tempo dictates what happens & when, just as in the time signature. You cannot add to it or take from it. If you want to make a change to a measure / bar in a time signature, you must use the appropriate notation in order to complete the measure / bar. (rest, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 notes etc...)
This same principal applies to the maximum resolution, it is fixed, there is no work-around. It sounds good but the doubling thing is not really happening. The ticks are what they are based on the tempo, they don't stay stagnant based on the tempo, they are tempo based, meaning they shift with the rate of the tempo. Hence, Pulse per quarter-note.
IE: A note on 0:00:48 at 180BPM is the same note on 00:00:48 at 90BPM. The resolution did not double of halve itself, depending on which way you go. The tempo caused that note on 0:00:48 at 180BPM to arrive twice as fast than the note on 0:00:48 at 90BPM. This is all simple mathematics, the resolution is not stretched or compressed based on the tempo, it remains at the same 96 PPQ no matter the what the tempo is set to. The tick is either going to come sooner or later, not double up or halve itself just because you increased / decreased it's rate.
If I understand you correctly, you are stating the following:
A note on 0:00:48 at 90BPM is the same note on 0:00:24 at 180BPM.
Is that correct?
If so, then you have two different notes at two different times. I've read people state that they double the Res by doubling the tempo, therebye stretching out the number of ticks over several bars. Yet no one has actually shown any proof of this actually occuring. If you do this, please provide some solid, conclusive evidence of it actually occuring.
Please enlighten me & show me the errors in my ways. I'm a simple hombre & sometimes I need help with matters. If I'm wrong, then so be it, but please show me where & how so I may truly understand. Muchos gracias!