I have an iPhone 7 (laugh all you want) and an Eden head that I just purchased for at home rehearsal. I have been using my little Ibanez Promethean for silent practice using the 1/8” aux input and a Lightning cable. The Eden has stereo aux inputs (from the days before iPhones). I’ve tried using the same cable with a single stereo and L/R adapters and am not receiving any signal. All recommendations appreciated!