Song Bird/Dytronics Tri-Stereo Chorus

The Song Bird/Dytronics Tri-Stereo Chorus, originally introduced in the early 1980s, is a legendary rack-mounted analog chorus unit renowned for its lush, three-dimensional modulation. Designed by Chuck Monte as a companion to his "Dyno-My-Piano" modded Fender Rhodes keyboards, the Tri-Stereo Chorus quickly gained popularity among Los Angeles session musicians for its ability to create ultra-thick, spatially rich chorus textures. The unit features three independent bucket brigade delay (BBD) lines—Left, Center, and Right—each modulated by dedicated low-frequency oscillators (LFOs). This design allows for unparalleled stereo depth and complexity. Produced under various names (Songbird TSC1380, Dytronics CS-5, and Dyno-My-Piano TSC618), it became an essential tool for defining the polished sound of the 1980s.

Historical Development

• Origins: Designed to complement Dyno-My-Piano's brighter, punchier Rhodes sound, the Tri-Stereo Chorus evolved into a versatile tool for guitars, keyboards, and studio production.
• Features: It offered two modes: Preset, with fixed LFO rates for shimmering ensemble-like effects, and Manual, allowing adjustable LFO speeds and waveforms. Users could combine both modes for even more intricate modulation.
• Legacy: Although discontinued after its initial production run, the Tri-Stereo Chorus remains highly sought after by collectors and has inspired modern recreations like Universal Audio's plugin emulation.

Notable Players

• Michael Landau: Made the Tri-Stereo Chorus a hallmark of his guitar tone on albums like Tales from the Bulge.
• Steve Lukather (Toto): Used it extensively for its lush stereo effects on both lead and rhythm parts.
• Dann Huff (Giant): Incorporated it into his session work to achieve dense chorus textures.
• Stevie Nicks & Chaka Khan: The unit's signature sound can be heard on their iconic '80s productions.

Popular Settings

The Tri-Stereo Chorus allows for highly customizable tones:

• Lush Stereo Sweep: Preset mode engaged with moderate LFO depth for smooth, shimmering modulation across all three channels.
• Thick Lead Tone: Manual mode with slower LFO rates and increased feedback on the Center channel for a rich, centered effect.
• Ensemble Effect: Combine Preset and Manual modes with faster LFO speeds for a dense, string-machine-like chorus.

Legacy

The Song Bird/Dytronics Tri-Stereo Chorus is considered one of the "holy grails" of analog chorus effects. Its ability to layer rich modulation across three channels made it a defining tool of the 1980s studio sound. Revered by session legends like Michael Landau and Steve Lukather, its influence persists in modern music production through vintage units and digital recreations. Its unparalleled depth and versatility ensure its place as a timeless classic in the world of effects processors.