Hi Arshia,
I’m using AVAudioSessionCategoryPlayAndRecord but maybe I should use 
AVAudioSessionCategoryRecord since my app does not itself do any playback. I do 
wish to let the user listen to background music on headphones if they wish.

Apple is suggesting I try the .measurement or AVAudioSessionModeMeasurement 
setting. Need to test that.

I use AudioUnits, the lowest level audio input possible.

Sorry I don’t know where all the mics are, I could only find four of them, 
three on the front, one on the back.  My app only wants to use one mic.

-Dean Reyburn

> On Nov 9, 2018, at 11:36 AM, Arshia Cont <[email protected]> wrote:
> 
> Hi Dean,
> 
> What AVAudioSession Category/Mode are you using? Beyond this, you should 
> probably tell us how you record (AVAudioEngine? AUnit?).. My first suggestion 
> si to check the Stream format of your audio chain with that provided by the 
> system (such as sample rate etc.).
> 
> Do you mind sharing the positions of the 5 microphones?! Time to buy one of 
> those I guess! :)
> 
> Arshia
> 
>> On 9 Nov 2018, at 17:29, Dean Reyburn <[email protected]> wrote:
>> 
>> Hi all,
>> My app, CyberTuner does low level audio recording and custom DSP, then 
>> displays the results in a way useful to pro piano tuners.  On iPad Pro 
>> generation 3 which was just released on Nov. 7th, the audio appears to be 
>> distorted. This is the first time I’ve ever seen any general recording 
>> issues with iOS devices.
>> 
>> There are five (!!) microphones on these new devices so I suspect that fact 
>> has something to do with the problem. Any suggestions or anyone else see 
>> issues with the new iPads?
>> 
>> My app simply uses the default microphone.
>> 
>> Thanks in advance,
>> 
>> -Dean Reyburn
>> [email protected]
>> www.cybertuner.com
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1-888-SOFT-440  or 1-888-763-8440
Reyburn CyberTuner, Inc.
http://www.cybertuner.com

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