| No Bass
That test and REW only go down to 80Hz. Furthermore, that 80Hz is the lowest edge of a third octave band. That can hardly be said to fully, or even adequately describe the room in terms of it's usefulness for music. The largest amount of energy in music lies in the lower octaves.
So, clearly from 80 Hz up REW is quite repeatable. Below 80Hz is simply omitted. I reckon it is quite likely FM and ETF etc. are also quite repeatable above 80Hz. Below that they give variable and unreliable but still IMHO very useful results.
DD
|