> From: Uli Kusterer <witness.of.teacht...@gmx.net>
> 
> 
> On 17 Apr 2015, at 22:32, Ron Wagner <r...@wagnertechnologies.com> wrote:
>> I asked the users if they might have had the mute switch in the muted 
>> position, and they state it was not in the mute position, and cycling the 
>> mute switch on and off had no affect.
>> 
>> Seeing as how we have not implemented a “cone of silence” feature in our 
>> app, I’m out of ideas of where to look and how to debug this problem. Since 
>> the sound always plays through earbuds when plugged in, I can’t see how it 
>> would be our code. 
> 
> If I may doubt your users for a second: There are different categories of 
> sound (I don’t recall what they were called precisely), which control whether 
> a sound should be muted by the mute switch or not. Have you checked whether 
> you’re possibly using the wrong sound category? The users you asked may have 
> only thought that since YouTube plays sound, it isn’t muted.
> 
> In general, the “mute” switch is actually a “ringer” switch. That is, it’s 
> supposed to *only* suppress notification sounds and ring tones, not e.g. 
> movie audio. Could that perhaps be your issue? I think the APIs that let you 
> set this category of sound are called “audio session” or so?
> 
> Cheers,
> -- Uli Kusterer
> “The Witnesses of TeachText are everywhere...”
> http://zathras.de
> 
> 
> 
> Date: Fri, 17 Apr 2015 15:36:09 -0700
> From: David Rowland <rowla...@sbcglobal.net>
> 
> Check Apple’s documentation for Audio Sessions,
> 
> https://developer.apple.com/library/ios/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Introduction/Introduction.html
>  
> <https://developer.apple.com/library/ios/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Introduction/Introduction.html>
> 
> Perhaps it will help.
> 
> David
> 
> 

Thanks Uli and David. I wasn’t aware  of the Audio Sessions API. I will 
implement what makes sense for our app. Since it is an intermittent problem, 
time will tell if it solves the problem.

Ron
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