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AirAura X1 / Dec 2016
A i r A u r a X 1 P R O G U I
3-D Plot
A 3-D plot of the audio spectrum shows the last ten seconds of audio and what the
audio levels were at each frequency during that time. The vertical scale represents level,
the horizontal scale frequency, and the diagonal scale is time. The graph being drawn right
up front represents “now.” As the display is updated, “now” becomes “then” and it moves
towards the back of the display and is replaced by a new “now.” The 3-D plot very accu
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rately displays how levels within different parts of the audio spectrum have been changing
over time. The floor of the display is purple and represents levels below -48dBFS. As the
levels become higher the colors morph towards red, the maximum displayed level. The
higher the signal is in the plot, the larger the signal amplitude at the frequency of the peak.
BS-1770 Loudness
The loudness meter shows the short term and long term average loudness of the pro-
cessed audio on the HD or FM side. The blue region is for more relaxed audio while the
contrast between the grey and red areas indicate the level of loudness achieved with older
digital or analog processors (grey) and the newer digital audio processors (red).