Sam,

Sorry for my late reply.

Regarding the bug with the iPad Pro detecting all USB audio devices as 
Headphones (wired devices):
I have now access to the name and UID of the port, so, indeed I can now find a 
workaround.
However, is there any reason why AVAudioSessionDescription portType stopped 
returning USB devices on iPad Pro?
Will it be deprecated or is it still a bug?
I cannot test it here but is there the same problem with HDMI devices?

Thanks,
JC




> On 3 Jul 2019, at 16:31, Sambasevam Shanmugam 
> <[email protected]> wrote:
> 
> JC,
> 
> I see that you’ve marked this issue as unresolved - 48900956
> 
> You filed that radar to track 2 separate issues:
> 1. High gain for usb devices
> 2. Some USB devices recognized as headphones
> 
> The radar was used to fix #1. Please open a separate radar for #2 and mark 
> 48900956 as resolved if you don’t see the high gain issue. 
> 
> As for #1, is there any impact for you if the device shows up as headphones?
> 
> -Sam
> 
>> On Apr 1, 2019, at 11:00 AM, Sambasevam (IMG CoreAudio) Shanmugam 
>> <[email protected] <mailto:[email protected]>> 
>> wrote:
>> 
>> Hi Jean,
>> 
>> I’ve got the information I wanted, so no further action is required on your 
>> part.  
>> 
>> -Sam
>> 
>>> On Mar 28, 2019, at 3:28 AM, Jean-Charles Rousset <[email protected] 
>>> <mailto:[email protected]>> wrote:
>>> 
>>> Hi Sam,
>>> 
>>> Sorry, bad translation, it is indeed the Voice Memos app. I have updated 
>>> the radar.
>>> Can you please tell me how to proceed to sysdiagnose on the iPad Pro? I 
>>> could not find the info.
>>> Thanks.
>>> JC
>>> 
>>> 
>>>> Le 26 mars 2019 à 19:52, Sambasevam (IMG CoreAudio) Shanmugam 
>>>> <[email protected] <mailto:[email protected]>> a 
>>>> écrit :
>>>> 
>>>> Hi JC,
>>>> 
>>>> For radar 48900956 - which audio interface, and which input are you using? 
>>>> By the Apple Recorder app, do you mean voice memos? 
>>>> 
>>>> -Sam
>>>> 
>>>>> On Mar 22, 2019, at 4:29 AM, Jean-Charles Rousset <[email protected] 
>>>>> <mailto:[email protected]>> wrote:
>>>>> 
>>>>> Hi Brian, Gordon, Sam,
>>>>> 
>>>>> Sorry for my late reply. I’m currently attending a show with tight 
>>>>> schedule.
>>>>> 
>>>>> Brian, Gordon, I plugged a device in the thunderbolt 3 (USB-C) connector 
>>>>> of a MacBook Pro and everything looks normal. Gain max is at 0dB and the 
>>>>> recording seems fine with both garageband or audacity softwares.
>>>>> 
>>>>> Sam, for now I have tested the Apple Recorder app and the Superpowered 
>>>>> SDK on iOS. Both gave the same results: USB devices are detected as 
>>>>> headphones/headsets and initial input gain is high (+29dB).
>>>>> The radar ID is 48900956.
>>>>> I will do the sysdiagnose as soon as I can.
>>>>> 
>>>>> Thanks,
>>>>> 
>>>>> Jean-Charles
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>>> Le 20 mars 2019 à 23:50, Sambasevam Shanmugam 
>>>>>> <[email protected] <mailto:[email protected]>> 
>>>>>> a écrit :
>>>>>> 
>>>>>> Hi JC,
>>>>>> 
>>>>>> Can you please tell me the audio interfaces you’ve tried so far? If 
>>>>>> you’ve filed a radar already, can you please provide the ID?
>>>>>> 
>>>>>> Also, can you please send me the sysdiagnose with one of the audio 
>>>>>> interfaces attached? 
>>>>>> 
>>>>>> Thanks,
>>>>>> Sam
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