Roland DC-50 Digital Chorus Book Ace Tone was the first

Ace Tone was the first company set up by Ikutaro Kakehashi who went on to found the Roland Corporation

Vintage Synth Explorer Boss DR-55 page has good info on this beat box

In excellent original condition - it has the early oscillator and filter boards (many of the PCBs are RA Moog boards)

the CS-40m offered a more affordable approach to something other than a mono-synth

It is a great studio mix tool - perfect for adding a thick velvety analogue swirl to whatever you care to put through it

Roland DC-50 Digital Chorus Book Ace Tone was the firstNear mint example of the uncommon, early Roland analogue BBD chorus. Sounds great very sea sick and wobbly at the max setting.