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FM-531HD / May 2013
F M - 5 3 1 H D G U R U G U I
HD Sound Adjust
Density
The HD
Density control adjusts how much short-
term limiting is permitted within the multiband and
broadband limiting sections. Higher settings will make
the audio more dense and “processed” sounding while
lower settings will be less so. Stations looking for a
“compressed” sound on their HD signal will find both
the Compression and Density controls quite useful for
tailoring the “feel” of their audio. Note that increasing
the Density setting will not cause the look ahead lim
-
iter to be overdriven because Guru GUI’s intelligence
will make other adjustments to prevent it. Distortion
and/or audible pumping will not increase simply be-
cause Density was increased.
Low/Warm EQ
The Low/Warm EQ control adjusts how powerful low frequencies sound on the
HD signal. When the control is at “0” and has not been touched since a preset was last
taken the factory assigned equalization for that preset is being applied. Adjusting the
control either side of “0” increases or decreases the factory equalization settings. In
general, setting the control to lower numbers reduces on‑air bass while moving it to
higher numbers increases it.
Mid/High EQ
The Mid/High EQ control adjusts how powerful the higher frequencies sound on
the HD signal. When the control is at “0” and has not been touched since a preset was
last taken the factory assigned equalization for that preset is being applied. Adjusting
the control either side of “0” increases or decreases the factory equalization settings.
In general, setting the control to lower numbers reduces on‑air highs while moving it
to higher numbers increases them.
Loudness
Once the previous controls have been adjusted for the desired sound texture, the
Loudness
control can be used to set the desired HD loudness. The Loudness slider
intelligently communicates with the HD processing’s 31‑band limiter and its look
ahead limiter.
As the Loudness
control is adjusted upwards of “5” the sound will get denser and
louder. The opposite occurs when the control is adjusted downwards of “5.”
Note that the Loudness control’s interaction with other processing sections has been
tuned to avoid undesired artifacts such as audible pumping and/or distortion when the
control is set to either extreme.
Summary of Contents for FM-531 HD
Page 2: ...Technical Manual Wheatstone Corporation May 2013 FM HD Digital Audio Processor FM 531hd...
Page 122: ...page A 2 FM 531HD May 2013 A P P E N D I C E S Appendix A General Specifications A 3 Contents...
Page 128: ...page A 8 FM 531HD May 2013 A P P E N D I C E S Appendix B FM 531HD GPI Interface A 9 Contents...
