UAD Powered Plug-Ins Manual v5.2 - Just Music

tion frequency, the frequency at which the decay rate is halfway between the
low-frequency and high-frequency values. At 100% thickness, the ratio of lowfrequency
to high-frequency decay times is 10:1. This means that the high frequencies
will decay 10 times faster than the low frequencies. At 200% thickness,
this is multiplied by two (high frequencies decay at 20x the rate of the
low frequencies). At negative 100%, the sense of low frequency and high frequency
is swapped —low frequencies decay 10 times faster than the high frequencies.
Many hardware and software reverbs tend to compensate for the high frequency
absorption that air provides. RealVerb Pro instead provides “Air” as
a material. If you do not choose to use Air as one of the materials, you can
effectively compensate for the high frequency absorption properties of air
with the Resonance filters. Set the right-hand Transition Frequency slider to
4.794 kHz, and bring the level down about –10 dB to –15 dB for large to
huge rooms, and down about –4 dB to –9 dB for small to medium rooms.
To help you out, the following lists classify the materials under two headings:
those that tend to reflect high frequencies, and those that tend to absorb them.
They are listed in order of their transition frequencies, from lowest to highest.
Table 16. Materials with high-frequency absorption
Audience
Fiberglass
Cellulose
Grass
Drapery
Plaster on Brick
Plaster on Concrete Block
Water Surface
Soil
Sand
Gravel
Brick
Paint on Concrete Block
Air
Carpet
Table 17. Materials with high-frequency reflection
Heavy Plate Glass
Seats
Plywood
Marble
Hardwood
Concrete Block
Glass Window
Linoleum
Cork
UAD Powered Plug-Ins Manual - 263 - Chapter 31: RealVerb Pro