And they 're different circumstances with different recording environment and so forth , so it 's  it 's  it 's really pretty different. But I think the idea of using a set thing was just to give you some sort of framework , so that even though you couldn't do exact comparisons , it wouldn't be s valid scientifically at least it 'd give you some kind of uh frame of reference. Uh , you know it 's not
Hey Liz , What  what do the groupings represent ?
OK.
You said there 's like ten different groupings ?