Which guitars did you use on Rush's first LP, Rush?

AL: I used the 335 and a rented Rickenbacker 12-string. That's it for guitars. I played them through my Marshall 50 with a 4-12 cabinet, and I used a Maestro phase shifter, a Cry Baby wah-wah, and an Echoplex.

Many of your songs have either a phased or a chorus effect.

AL:I like both sounds. Ever since A Farewell To Kings I've used a Roland Boss Chorus. I liked the Maestro phaser as opposed to, say, MXR Phase 90s or 100s; it was a little more subtle than the MXR phase lines. But after I heard the Chorus, I loved it and decided to incorporate it into my music. Hemispheres and Permanent Waves have a lot of Chorus -almost every song has Chorus, since with a three-piece band it tends to widen the guitar sound.

Source: Guitar Player Magazine, June 1980.

"Above all, we wanted it to sound not like a traditional guitar solo; it just needed to sound interesting. It then goes from that into a Klon—with no drive on it really, just to beef up the mids—and then through a Roland CE-1 chorus."

John used this pedal from 1974-c.1980 for a chorus effect on his bass.

"Things I used a lot for that sweet sweet chorus sound"

Another guitar pedal, which was confirmed during the Boss interview shown here. Here is the bit where they talk about the CE-1 and the CE-2.

"Back in The Police days, were there any BOSS pedals that you gravitated to?"

"Yeah. I obviously had the Roland and BOSS chorus."

"The CE-1 Chorus Ensemble, or the CE-2 compact pedal?"

"That’s the little pedal right? There was a bigger box, you know?"

"The CE-1 and CE-2 were BOSS pedals, and there was a rackmount Roland chorus called the Dimension D."

"Yeah, I had the big box for a while, because it was very good. You know, for a long time in that period, I operated [it] with my Pete Cornish board once it was all set. Obviously, as time went on, I got the BOSS pedals."

According to Reverb's website, his pedalboard for the "Hell Freezes Over" tour included the Boss CE-1.

On this picture you can see a Boss CE-1.

Ryan Adams features the Boss CE-1 Chorus Ensemble on his Instagram, showcasing its role in his setup.

In this photo you can see a Boss CE-1 on the floor.

This detailed gear diagram of Dean DeLeo's Army of Anyone stage setup, which traces the signal flow of the equipment in his 2007 guitar rig, includes a Boss CE-1 Chorus Ensemble pedal.

In an article from KeyboardMag, it is noted that Michael Jackson's track "Don’t Stop ’Til You Get Enough" features the distinctive sound of a Paul Rivera-modified Boss CE-1 Chorus Ensemble. This effect was applied to an Eddy Reynolds-modified Rhodes 88, famously used by musicians like David Foster and David Paich in the '80s.

Used on "The Velvet Fire", as specified in this July 20, 2012 breakdown of a A Fine Pink Mist gear list printed in the October 1996 issue of Young Guitar.