Yes, I found the same thing!
One thing I did find is that I had some old code that was trying to set the
gain of the input ADC, assuming that the internal mic was being used, and this
got converted to sending out USB HID volume changes, which resulted in the USB
audio device I had connected increasing its gain. When I lowered the gain I was
setting, the USB gain went down as well.
Seems a little buggy.
Best,
Andrew Smith
> On Mar 15, 2019, at 12:00 PM, [email protected] wrote:
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> 1. iPad Pro USB audio (Jean-Charles Rousset)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 14 Mar 2019 21:55:09 +0100
> From: Jean-Charles Rousset <[email protected]>
> To: [email protected]
> Subject: iPad Pro USB audio
> Message-ID: <[email protected]>
> Content-Type: text/plain; charset=utf-8
>
> Hi everyone,
>
> I just got the new iPad Pro with the USB-C connector.
> Our iOS app works with different external USB audio devices.
> I wanted to check if everything works fine but I am quite surprised about the
> results I got:
> All USB devices seem to be recognized as « Headsets », not as USB devices
> like it used to be. The number of In an Out channels seems to be correct
> though.
> Furthermore, there seems to be a higher « gain ». I could dig a bit and all
> samples seem to around 28.18 bigger.
> There is very probably a reason about all of this but I have to say that I am
> a bit lost here…
> Note that this is not related to our app as the genuine recorder gives the
> same results. Our audio devices integrate a XMOS, but I also got the same
> results with basic other sound cards.
> Am I missing something?
> Thanks a lot.
> JC
>
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> End of Coreaudio-api Digest, Vol 16, Issue 16
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