Roland Dimension D

The Roland Dimension D (SDD-320), released in 1979, is a legendary rack-mounted stereo chorus unit renowned for its subtle yet highly effective spatial and stereo-widening effects. Designed to enhance the sound of any instrument without overwhelming its tonal character, the Dimension D uses Bucket Brigade Device (BBD) delay lines and advanced signal processing to create its unique sound. Unlike traditional chorus pedals, it emphasizes width and depth rather than overt modulation, making it a favorite in professional studios. The unit features four preset modes of increasing intensity, controlled via pushbuttons, and offers balanced and unbalanced inputs for versatility. Despite its simplicity, the Dimension D became an industry standard for adding richness and dimension to recordings.

Historical Development

• Origins (1979): Roland designed the Dimension D as a studio-grade chorus effect, building on the success of their JC-120 amplifier's chorus circuit. Its ability to subtly enhance stereo imaging set it apart from other chorus devices of the era.
• Design Philosophy: The Dimension D was engineered to avoid the "warble" or overt modulation typical of other chorus units, instead delivering smooth, natural enhancement.
• Legacy: Although discontinued in the 1980s, its influence persists through modern recreations like Universal Audio's plugin emulation and Arturia's Chorus-Dimension D.

Notable Players

• Peter Gabriel: Used the Dimension D extensively on his records to add depth to vocals and instruments.
• Talking Heads: Incorporated it into their production for its iconic 1980s spatial sound.
• INXS: Known for using it on their clean guitar tones and other elements in their mixes.
• Alan Murphy (Go West/Kate Bush): Relied on it in studio sessions for lush guitar textures.

Popular Settings

The Dimension D's four modes offer varying levels of effect:

• Mode 1: The most subtle setting, ideal for gently widening vocals or acoustic instruments.
• Mode 2: A slightly more pronounced effect, often used on electric pianos or strings.
• Mode 3: A balanced setting for synths or clean guitars that need moderate enhancement.
• Mode 4: The most intense mode, perfect for dramatic stereo widening on bass or pads.

Legacy

The Roland Dimension D remains one of the most revered chorus units in music production history. Its ability to add width and richness without overpowering the source material made it a staple in studios throughout the 1980s and beyond. Used by iconic artists across genres, its understated yet transformative sound continues to inspire musicians and producers worldwide. Vintage units are highly sought after, while digital recreations ensure its timeless character remains accessible.