Jimmy, Harry, right on! A bunch of old guys (me included) playing bass guitar with modulation processing.
There's so much to say about the sonic genre. So many different applications and types of sound. As for chorus per se, or flanging pretending to be chorus, my current interest mostly recalls the 4AD stuff. For example, these two tracks from Cocteau Twins' "Heaven or Las Vegas":
Just now I replaced the footswitch in my friend's vintage 1981 MXR Stereo Chorus. While testing the repair, I realized that I could compare the old MXR Chorus to the Omicron Chorus. So I did... a lot.
In summary, the vintage MXR Stereo Chorus is what the Omicron Chorus wants to be when it grows up.
Though in itself the Omicron sounded credible as an 'old chips' type of chorus pedal, compared to the MXR it sounded small and narrow bandwidth. The MXR went deeper and higher. For bass guitar, the MXR's lower frequency response was the clincher, of course, but the addition of the icy highs made it sound very big.
I've hear it said that part of what makes the original Mu-Tron III sound so good is its preamp. Maybe the same is true of the original MXR Stereo Chorus.
JimmyM is all set for a chorus pedal, I know. However, I felt I should follow up. Spoiled for chorus pedals after playing my friend's vintage MXR one recently, I set about listening online for an alternative. What contemporary chorus pedal could come close to the old MXR? Which one had the bite, swirl, snarl AND warm depth... with bass guitar?
It was a high bar, and online demos can mislead. I took my best guess, choosing the [Invalid or Expired Link Removed] to try. Today I can report that the MF Chorus is excellent with guitar and a gem with bass guitar. Its range is so wide that it spans flanging and chorusing. And its voice is both deep and (can be, per settings) biting.
Less noisy and more polite than the vintage MXR Stereo Chorus, nonetheless for my target voice and range of sounds, the Moog MF Chorus is the one for bass guitar. I can't imagine anything being better. As good to taste, maybe; but not better. They should have called it the MF Bass Chorus Flanger and been done.
P.S. - In my opinion, even the MSRP street price for this pedal new is a bargain. I found a used one in mint condition for 32% below new.