Studer Vista 1 Operating Instructions Manual page 391

Shape and Spread :
RT High Cut :
Liveliness or Hi Cut :
ER Level :
Feedb Dly :
Feedb Level :
Document generated: 18.04.17
temporarily muted when Size is changed.
In the Hall reverbs, Shape and Spread work together to control the over-
all ambience of the reverberation. Shape determines the contour of the
reverberation envelope. With Shape all the way down, reverberation builds
explosively, and decays quickly. As Shape is advanced, reverberation builds
up more slowly and sustains for the time set by Spread. With Shape in
the middle, the build-up and sustain of the reverberation envelope emulates
a large concert hall (assuming that Spread is at least halfway up, and that
Size is 30 meters or larger). Low Spread settings result in a rapid onset of
reverberation at the beginning of the envelope, with little or no sustain. Higher
settings spread out both the buildup and sustain.
RT HC sets the frequency above which a 6dB/octave low-pass filter attenuates
the reverberated signal. It does not attenuate the reflections. High frequencies
are often rolled off with this parameter, resulting in more natural-sounding
reverberation. Setting a low frequency for this parameter can actually shorten
the reverb time, as it damps the audio as it recirculates.
Adjusts the amount of high frequency content in the reverberation tails. Higher
settings increase high frequency response, creating brighter reverbs; lower
settings create darker reverbs with more bass frequency emphasis.
B Boost : Sets the frequency at which the transition from Mid Rt to Low Rt takes place.
This control should be set at least two octaves higher than the low frequency
you want to boost. For example, to boost a signal at 100Hz, set B Boost
Frequency to 400Hz. (This setting works well for classical music.) Crossover
works best around 400Hz for boosting low frequencies, and around 1.5 kHz
for cutting low frequencies.
Ratio : Ratio boosts or cuts frequencies below the B Boost frequency. The amount
of boost or cut required is highly dependent on the material being processed.
Diff : Controls the initial echo density. High settings of Diffusion result in high
initial echo density, and low settings cause low initial density. In a real-world
situation, irregular walls cause high diffusion, while large flat walls cause low
diffusion. For drums and percussion, try using higher Diffusion settings.
ER Time : Adjusts the amount of time before reverb early reflections occur.
Adjusts the level of early reflections within the reverb.
Changing this parameter changes the resonant frequencies of Plate reverb.
Adjusts the Plate reverb's presence and prominence.
Boing : This is a unique parameter to the Spring reverb, designed to increase or
decrease the amount of spring rattle that is a physical characteristic of spring
tank reverbs.
SW V5.3
Vista 1 Digital Mixing System
Vista FX 1-15