I have 2 Rolands, a 501 and a 555. Love 'em.
I've said it before.....There is not a single mix, I can't make a little better with a little tape delay. All genres. I use it for Dixieland and Psychedelic Rock.
Also, I have an - Audio Instrument Corporation - Tape Delay. It is 50s Psy Fi.
If anyone has or has info on the Audio Instrument Corporation unit, PM or post.