I've been preaching this stuff for a few years, had a few plans to build some. Not that savvy with software or hardware design so after a long while researching the many avenues I would need mastery in to construct such a device, I have lost hope. I had intended to make a wireless I/O to work with the iPad for use with a very basic app like the one StudiSix makes, essentially a Neutrik A2 app. I travel a lot to studios and carrying a large laptop, test unit, and various wire adapters along with all my tools is just cumbersome. I wanted a small box I could just route signal in and out of to connect to my phone or ipad. None of the big boys (NTI, Prism) gave a sh*t about building anything for Mac when I spoke with them at NAAM, and I don't want to buy a PC/Bootcamp for this. Mac is plenty capable of running these tests, plus it has the benefit of being the computer choice in EVERY studio I have visited in the past 6 years as a full time tech. Not sure why they are so adverse to leaving the Windows domain, but I am sure the car industry and other large clients dont care about the Mac/PC argument. For now I use an Analog Discovery in a project box breaking out into 4 XLR/TT jacks. It works very well for the basic wavegen, and scope functions, but it is not designed for audio, so it is not streamlined. I recently found last week that NTI makes a box for testing Bluetooth with 2 XLR M/F that I am wondering may be able to commandeer to work as a wireless box to send/receive line level signals to an iPad/iPhone. Still havent composed the email to them to investigate.