peter while most of us (and I mean all of us 😊 ) can’t “hear” if the signal is a little low out of the iPad, most experienced ears will definitely hear if the internal audio is starting to clip/distort/etc.
Having converted all my tracks now to multitracks, I can hear that some tracks now starting to push that threshold. It’s no longer stereo mastered output it is now 6-8 tracks together pushing the output of the iPad, even having a limiter on the master effect bus I can hear that some tracks are simply sounding like they reached the limit. Backing up playlist/eq gain by a couple of db helped and then I gain in up in whatever I plug into.
No noise and nothing funny. Any mixer needs an optimal input, and having the iPad on the verge of clipping isn’t going to do your sound any good. We’re talking 6db here not a faint whisper of sound.
It’s fine if that’s how you like to do it, I have my own pet peeves, many of them, and maybe other pros also raise an eyebrow, it’s ok, that’s how I like it, like to use it etc
😊