E4L Brownian Delay

The E4L Brownian Delay is a spatial effect that renders 8 copies of a mono input signal with randomized spatial motion in the voices.

The Heads-Up Display shows the motion and placement of the voices. The top view is a bird-eye overhead view of the X-Y plane, and the bottom view is a profile view of the vertical X-Z plane. A shape is drawn over the display indicating the space in which the voices are free to move. This shape is determined by the controls to the right. The Box/Pie toggle controls whether the eligible space is a rectangular prism or a conical pie slice. In Box mode, controls are available for the size of the box in the X, Y and Z dimensions. In Pie mode, controls are available for the Azimuth, conical Size of the slice in degrees, and the range in the Z dimension.

The virtual touch-pad controller modifies the Delay Time and Freq Shift applied to the voices. One of the voices is always routed with no delay or frequency shift, the other voices use a random distribution of delay times and frequency shifting in the range from 0 to the bounds specified by the knobs. An additional control specifies whether the delay voices are Fixed or Random. In Fixed mode, the chosen delay times and frequency shifting remain constant for each voice. In Random mode, the delay time and frequency shifting for each voice is randomly selected on every quarter-note tick of the sequencer, adding another layer of randomization to the results.

The Step control specifies the magnitude of the random motion, and the Glide control specifies the amount of smoothing applied to the motion. The Dist control specifies whether distance panning attenuation should be applied, whereby the voices decrease in amplitude as they move farther from the origin.