User manual

4REA4 Controller Software User Guide
72
V1.30
12. Appendix A – Rack FX
The Rack FX selection combines the pristine quality and wide choice offered by boutique plug-ins with the
convenience and low latency of onboard processing.
12.1 Rack FX models
SMR Reverb - SMR Live is a Spatial Modelling Reverberator featuring 4 fully configurable complex spatial
models Classic, Hall, Room and EMT. Each of these models use different reflection and decay algorithms to
provide natural sound spaces ideal for Live sound.
Classic Emulates high quality plates. Shape tailors the reflection pattern. Min position for fast attack, mid
position for rounded early reflections, and max position for separated early and late reflection patterns.
Adjusting shape/size/predelay with decay can result in some great Hall reverbs. Small size settings not very
useful in live sound applications.
Hall Emulates a real Hall reflection model. No shape control, reflections are controlled with Size, Source
diffusion and Ref detail with rich deep decay spectrum.
Room Accurately emulates a characteristic complex room reflection pattern.
EMT Classic plate emulation. A great plate with good tonal balance for live use. Decay setting around 2
seconds is typical.
The SMR primary controls essential for live mixing are always visible:
LF Cut - 0 to 400Hz, 24dB/octave high pass filter to cut low frequencies of the input signal to the reverb.
HF Cut - 2kHz to 20kHz, 24dB/octave low pass filter to cut high frequencies of the input signal to the reverb.
Predelay - The time it takes before the reverb reflections and decay are heard.
Decay Time - Broad spectrum decay control. The time it takes for the reflections to decay to 60dB below
the level of the direct sound is known as the RT60, an important measurement of reverb in a room.
HF Decay - Frequency at which the high frequency decay attenuation starts.
HF Slope - The attenuation slope of the high frequency decay. HF Decay and Slope are both essential for
high frequency decay spectrum adjustment in a live space. Setting HF Decay and Slope low creates a
natural sounding decay. Setting HF Decay and Slope high creates a dramatic decay.
In addition there are 5 pages of scrollable ‘Expert’ pages for the Reverb which allow precision control:
Page 1 - Reflections - Source Diffusion, Size, Shape, Ref Detail.
Dedicated to reflection control. Keep source diffusion and detail low to help intelligibility. Small sizes are not
typical for live applications. ‘Shape’ is only available in the Plate model.
Page 2 - Echoes - Echo1, Echo1 level, Echo2, Echo2 level.
Dedicated page for user defined echo reflections. You can insert main reflections to create Echo reverb
sounds. Echo1 goes to left Echo 2 goes right. Echoes may be layered over the reverb.
Page 3 - Decay Texture - Body Diffusion, Tail diffusion, Mod depth, Mod speed.
Separate body and tail diffusion controls can help prevent metallic decay through too much diffusion.
Modulation depth and speed increase reverb density and add chorusing, effective on percussive program
but not as useful on piano and vocal.
Page 4 - Decay Spectrum - LF decay, LF XOver, Colour, Colour Freq.
Separate LF decay control with crossover frequency and decay time, useful for live work. Colour is a
tuneable element in the decay. High Freq colour settings can enhance ambience, although it can sound
metallic with some programme.
Page 5 - Reflection/decay level - Reflection level, decay level.
These controls are dedicated to balancing reflection and decay to improve intelligibility.