I purchased a new Sonic Port from Amazon yesterday, and started using it straight away with GarageBand on my iPhone 6s (running iOS 10.1.1). No connection issues and everything seemed to work great... but then, when listening back, I noticed that there were random clicks every so often. Initially I thought it might be clipping, but the input volume was pretty low and the waveform was nowhere near clipping levels. This was using a stereo out from my electro-acoustic drum brain.
Then, this morning, I tried recording some bass guitar - totally different set of cables - the only common components were the Sonic Port and my iPhone. I noticed the clicking (which sounds very much like clipping) almost immediately. And most noteworthy of all is that the clicking was happening when there was no sound coming from my instrument - it was just plugged into the preamp, but the pickup volume was all the way down, so it definitely wasn't clipping.
As far as I can see it, there are only two possibilities: it's either the Sonic Port, or it's GarageBand (or, by extension, an issue with iOS 10 and the audio interface with GarageBand).
has anyone else had this issue? Should I return it?