I am seeing an audio fade in issue on iOS 10 and iPhone 7. When audio begins it fades in from very low to set volume over a period of 5+ seconds or so. Apps that use short audio prompts have greatly reduced volume as there is not time for the volume to reach the set value.
I am not seeing this with iOS 10 on either iPhone 5 or 6. So far only on iPhone 7.
Any ideas?