Because the FFT Waterfalls are similar to the frequency domain graphs, they share the same settings. However, there are some important differences to highlight in their use.
Normalizing the waterfall will locate the maximum data point in the entire field of data and set that as the 0dBFS reference point for plotting. This is the default / recommended value for most purposes, as it is common to think of the displayed values in terms of how much they have decayed from the 0dB point.
The log frequency scale is helpful when viewing a full spectrum as the display is closest to how our ears perceive audio frequencies. Because the waterfall displays an immense amount of data, we recommended that you use a fractional octave smoothing value whenever a wide range of frequencies is shown.
When selecting multiple measurements, the waterfall graph will overlay them on the same graph. This visualization can be helpful to see changes in decay before and after making changes to your space. Graphs are drawn in the order that the measurements appear in the selection.
Note: In version 4.0, only the Comparison mode is supported. |