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LX480 Dual-Engine Reverb

Algorithm Reference

Hall

Algorithms – Hall

The Hall algorithm is one of the first algorithms released in the original hardware.

This is a classic algorithm that can be used to create the sound of a concert hall. It is considered by many to be the definitive 80’s reverb sound.

It's a very distinctive sound perfect for the right material. It is prone to coloration, which you can easily reduce by using larger room sizes, and you can hear strong stylistic pitch effects when used with a lot of modulation.

While many love the distinctive characteristic of this stylistic sound, it may not the best candidate for more natural or "realistic" mix applications.

If you need a more realistic sounding hall or if you want to create a long reverb effect (4 seconds or more), you might want to try the Random Hall or Random Hall HD algorithms.

The Hall Algorithm Sound

The original designers were very aggressive with the development of their algorithms between releases, specifically in trying to overcome the technical limitations of the era.

They spent years in deep research to find creative ways to create a reverb tail with enough density to feel like a real space, without any unpleasant resonance or digital artifacts.

This lead to industry-first breakthroughs to make this Hall algorithm the first algorithm to not need a chorus to reduce any metallic resonance or “ringing.”

It also has a significantly better frequency response than its predecessor, giving you a more open high end.

Using Relab’s Deep Machine Learning Technology, we have not only painstakingly recreated a sample-accurate emulation of the original Hall algorithm, but we have also added additional features so you can not only have an authentic 480 Hall reverb, you can create more vintage or more modern reverb sounds.

Key Parameters

these parameter descriptions should be shown dynamically from parameters section

Here are a few of the more significant parameters you can use to get the most out of the Hall algorithm.

  • Size
  • Shape
  • Spread
  • DCO

The Hall Algorithm Block Diagram

The following block diagram flowchart is a graphical representation of the steps of the Hall algorithm. This makes it easier to understand the logic and flow of the algorithm and its parameters.

Hall Algorithm Available Parameters

The following tables lay out all the editable parameters available in the Hall algorithm, in both the Hardware Mode and Advanced Mode.

  • Hardware Mode is an authentic reproduction of the original LARC workflow.
  • Advanced Mode gives you a more interactive visual interface, as well as access to additional parameters and functionality. Any additional functionality not available in the original hardware has been highlighted.

Hardware Mode

Page Slider 1 Slider 2 Slider 3 Slider 4 Slider 5 Slider 6
Quick Reverb Time Mid (RTM) Shape (SHP) Spread (SPR) Size (SIZ) High Frequency Cutoff (HFC) Pre-Delay (PDL)
Misc Bass Multiply (BAS) Bass Crossover (BXO) High Crossover (HXO) Diffusion (DIF) Decay Optimization (DCO) Mix (MIX)
ERLV Echo Level 1 L > L (LV1) Echo Level 2 L>R (LV2) Echo Level 3 L>L (LV3) Echo Level 4 R>R (LV4) Echo Level 5 R>L (LV5)
Echo Level 6 R>R (LV6)
ERTM Echo Delay 1 L > L (DL1) Echo Delay 2 L>R (DL2) Echo Delay 3 L>L (DL3) Echo Delay 4 R>R (DL4) Echo Delay 5 R>L (DL5)
Echo Delay 6 R>R (DL6)

 

Advanced Mode

Page Slider 1 Slider 2 Slider 3 Slider 4 Slider 5 Slider 6
Time Reverb Time Mid (RTM) Bass Multiply (BAS) Bass Crossover (BXO) High Multiply (HIG) High Crossover (HXO)
Reverb Filter Type (RFT)
Shape Shape (SHP) Spread (SPR) Size (SIZ) Pre-Delay (PDL) Width (WID)
Filter Low Frequency Cutoff (LFC) Low Shelf (LOS) High Frequency Cutoff (HFC) High Shelf (HIS)
Output Filter Type (OFT)
Mod Chorus Type (CHT) Chorus Rate (CHR)
Chorus Density (CHD)
Den Diffusion (DIF) Decay Optimization Channel (DCC) Decay Optimization (DCO) Reverb Level (LEV) Mix (MIX)
ERTM Echo Delay 1 L > L (DL1) Echo Delay 2 L>R (DL2) Echo Delay 3 L>L (DL3) Echo Delay 4 R>R (DL4) Echo Delay 5 R>L (DL5)
Echo Delay 6 R>R (DL6)
ERVL Echo Level 1 L > L (LV1) Echo Level 2 L>R (LV2) Echo Level 3 L>L (LV3) Echo Level 4 R>R (LV4) Echo Level 5 R>L (LV5)
Echo Level 6 R>R (LV6)

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