I have a Roland and used the cables below to connect to my ipad (also use melodics): https://www.amazon.com/gp/product/B00NH11KIK/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 with https://www.apple.com/shop/product/MJ1M2AM/A/usb-c-to-usb-adapter