One method for getting chord drones from a monosynth!
One of them came with the little breath controller – you can assign it to VCA or VCF
I bought the black one thinking it was the MKII which has a filter slider rather than hi/low switch… But nope, it was a Mk I in disguise!
There is a urban legend, that apparently after Yamaha stopped selling them, a reggae band was touring NZ & their bass player rang the Yamaha distributor asking if they had any left in stock…. and bought them! (citation req)


I still sometimes see breath controllers in music stores in Japan, might be worth having a look next time you’re there.