Thank you for your feedback.
Please, please, please, try with different hard drive.
You all the time send me the log from the same HDD it would be really useful to see what happens with other drive(s) as I suggested before.
I also have these dropouts lately. It happens when playing back the recording. I have noticed that I have to reset the date settings but that does not prevent the dropouts.
I have found out that when starting the playing I immediatly after a few seconds remove the uTrack progam from the active memory of the iPhone 6 with the latest upgrade. After removing the program from meory I have no problems with dropouts whatsoever.
At the end of the song it stops automatically.
I think it has to do with the latest software upgrade of Apple.
I have tried to reproduce the issue with no success.
Are you sure is that dropouts happens only during playback? (maybe the recording already has it?)
Could you please try to create a song in uTool then export to the drive and try to playback. Do you have dropouts in this case as well?