Alesis io Hub vs. Roland Duo Capture EX + add'l house concert equipment needs
I'm using an iPad Air 2, and though I haven't started using Loopy in live performance yet, I'm going on a house concert tour next year, and am eager to climb this learning curve! (Gear Newb Alert!!)
In a previous discussion, I asked for suggestions for a minimum viable setup for live performance. I'm revisiting that again, but getting more specific.
Two suggestions that looked interesting to me in the previous thread were:
Alesis io Hub ($81.15 on Amazon)
Roland Duo Capture EX ($199 on Amazon)
I'm having a hard time figuring out
A) What the difference is
Which would be better for my needs.
1) What does the Roland Duo Capture EX do that warrants spending almost $120 more than on the Alesis io Hub?
2) Do I need a Lightning to USB Camera Adapter for either of these items?
In addition, I'm trying to figure out what OTHER equipment I need in order to loop for a small, living room-sized audience (20-40 people in a private home).
I won't need a ton of amplification -- these will be acoustic gigs, voice + ukulele, PLUS looping (if I can figure that side out in time!!!)
3) Can I use my Shure SM-58 microphone, or do I need to buy a special mike? If I CAN use the SM-58, what equipment do I need in order to plug it into the iPad Air 2? Or does the mike plug into the Roland or Alesis???
4) What kind of speaker setup would you recommend for an otherwise acoustic gig? (Obviously the sound has to get from the iPad Air 2 to the audience, and I'm not sure if the internal iPad speakers will be enough.)
5) How do I get the sound out to the audience, without it being picked up by Loopy? Is that just a matter of setting the noise gate, so the microphone only picks up my voice (or my ukulele, as the case may be)?
Thanks for your help!