Arrangers are designed (And always have been) for the home hobby player (Most were previously Home Hobby Organists who wanted a more compact and easier instrument to play at a favourable price) and so modules are a very niche (And probably non profitable) market. (Sound modules on the other hand are more popular)

Bill

Hi Donny

You are playing a software arranger, it’s just a bespoke system to Yamaha that you cannot add anything to, or upgrade without buying a new instrument. (The same as most other arrangers on the market)

Bill
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