This control selects one of seven reverb algorithms: Hall, Church, Plate, Room 1, Room 2, Ambience, or Nonlinear. Selecting an algorithm changes the preset provided for it. Switching the Size setting changes characteristics of the algorithm that are not altered by adjusting the decay time and other user-adjustable controls. Each of the seven algorithms has a distinctly different character:A good general purpose concert hall with a natural character. It is useful over a large range of size and decay times and with a wide range of program material. Setting Decay to its maximum value will produce infinite reverberation.A dense, diffuse space simulating a church or cathedral with a long decay time, high diffusion, and some pre-delay.Simulates the acoustic character of a metal plate-based reverb. This type of reverb typically has high initial diffusion and a relatively bright sound, making it particularly good for certain percussive signals and vocal processing. Plate reverb has the general effect of thickening the initial sound itself.A medium-sized, natural, rich-sounding room that can be effectively varied in size between very small and large, with good results.A smaller, brighter reverberant characteristic than Room 1, with a useful adjustment range that extends to “very small.”A transparent response that is useful for adding a sense of space without adding a lot of depth or density. Extreme settings can create interesting results.Produces a reverberation with a natural buildup and an abrupt cutoff similar to a gate. This unnatural decay characteristic is particularly useful on percussion, since it can add an aggressive characteristic to sounds with strong attacks.