A couple of Audio friends came round and helped me with the upcoming CiO but we worked out what we could do with he AiO and a mobile phone. We can use it to interface to a sound desk and create a Telephone balancing unit. Granted that the power is all for the phone and you need a good wi-Fi or mobile signal but here it is working rather well.

I have an output from the AiO going direct to the input of the desk. A mic is going straight to the desk and I am using an AUX to feed this back to the AiO so the caller can hear me and what else the feed is.

I was quite impressed!

Big thanks to Rick and Neil.