So I have an Xair 18, I downloaded the app for my IPhone 7 and when I open the app everything synced and I see all the faders and signals moving. There is no issues there. I just cannot hear the audio through my phone. My other musicians have Note 9 & 10’s and IPhones. And none of us cannot hear the audio. We plug our Ear buds in and we hear nothing. Am I doing something wrong? Am I missing a step?