Notice for Samsung users (10 October 2015) : due to a bug in the permission system of the Android 5.1.1 update for certain Samsung models, Audio Evolution Mobile and USB Audio Recorder PRO can not use USB devices on these models. We have made a work-around for USB Audio Player PRO while we wait for a real solution from Samsung, but have chosen not to do the work-around for our other apps because it has some side effects. The problem has been reported so far for the Tab Pro 12", Tab 4 7" LTE and S5 models, but if you can, please do not install a system update until Samsung solves this problem. We have filed a bug report to Samsung, but we'd appreciate if you also complain to Samsung about this if you experience this problem so that it has a higher chance of getting fixed. Note that the problem also occurs on similar products, so it's definitely not a bug in the app.