A follow up: My iPhone XS Av session has a sampleRate of 48khz, however this device records with a lot of distortion at 48khz. At 44.1khz the iPhone records perfectly.
So I’m still searching for a way to determine a reliable distortion free recording rate on all devices. For now I can use 48khz only with the “iPad8,x” but that’s a hack and the wrong way to do this in the long run. FWIW I’m using the play and record av session type. -Dean > On Nov 14, 2018, at 4:52 PM, Martin Man <[email protected]> wrote: > > Hi Dean, > > What’s the > https://developer.apple.com/documentation/avfoundation/avaudiosession/1616499-samplerate?language=objc > > <https://developer.apple.com/documentation/avfoundation/avaudiosession/1616499-samplerate?language=objc> > reporting back to you? > > Martin (still unable to test on 11”) > > >> On 14 Nov 2018, at 14:24, Dean Reyburn <[email protected] >> <mailto:[email protected]>> wrote: >> >> Hi Pascal, >> I have found a possible solution for my recording (only) app which was >> giving distortion on iPad Pro gen 3 . My older versions record only at >> 44.1khz. When I change to 48khz the recording is perfect. Either sample rate >> works fine for my app, but I simply need to know during intitialization >> which to use. >> >> I’m still talking to Apple DTS about how to detect whether a device wants or >> needs 44.1khz or 48khz. There are no error returned when an iPad Pro gen 3 >> from AudioUnitSetProperty() or any other audio units call on iPad Pro 3 when >> starting recording. The iPad Pro 3 accepts 44.1khz and confirms that it can >> do this sample rate with AudioUnitGetProperty() even though the recording is >> distorted. >> >> So far I have not found how to detect the “default” or “native” recording >> sample rate for a device if such a thing exists. >> >> -Dean >> >>> On Nov 14, 2018, at 5:02 AM, Flavio Antonioli <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> Pascal, >>> >>> we have also received reports from some of our users of audio distortion on >>> the new iPad Pro. We too are using RemoteIO. >>> We don't currently have a device to test with so I wasn't able to reproduce >>> the issue. >>> >>> Flavio. >>> >>> On Tue, Nov 13, 2018 at 9:00 PM <[email protected] >>> <mailto:[email protected]>> wrote: >>> Message: 2 >>> Date: Tue, 13 Nov 2018 16:43:53 +0100 >>> From: Pascal Douillard <[email protected] >>> <mailto:[email protected]>> >>> To: [email protected] <mailto:[email protected]> >>> Subject: Audio cracks with the iPad 11" >>> Message-ID: <[email protected] >>> <mailto:[email protected]>> >>> Content-Type: text/plain; charset=utf-8 >>> >>> Hi everyone, >>> >>> I have an audio app for iPad & iPhone and I have been getting audio cracks >>> on the new iPad Pro 11”. The cracks happen on speakers and on headphones on >>> the USB-C port but not when using bluetooth headphones like the Air Pods. >>> >>> They do not happen on any of the other iPads or iPhone. >>> >>> The audio engine is in C++ and is running in Core Audio using a single >>> RemoteIO unit. No extra audio libraries are used. >>> >>> This is not related to the forced 48K sample rate of the iPad 11” as the >>> app runs fine with the same sample rate on other devices. >>> >>> Anyone else has experienced the same? Thanks. >>> >>> Pascal >>> >>> ------------------------------ >>> >>> Subject: Digest Footer >>> >>> _______________________________________________ >>> Coreaudio-api mailing list >>> [email protected] <mailto:[email protected]> >>> https://lists.apple.com/mailman/listinfo/coreaudio-api >>> <https://lists.apple.com/mailman/listinfo/coreaudio-api> >>> >>> >>> ------------------------------ >>> >>> End of Coreaudio-api Digest, Vol 15, Issue 94 >>> ********************************************* >>> >>> _______________________________________________ >>> Do not post admin requests to the list. They will be ignored. >>> Coreaudio-api mailing list ([email protected] >>> <mailto:[email protected]>) >>> Help/Unsubscribe/Update your Subscription: >>> https://lists.apple.com/mailman/options/coreaudio-api/dean%40reyburn.com >>> <https://lists.apple.com/mailman/options/coreaudio-api/dean%40reyburn.com> >>> >>> This email sent to [email protected] <mailto:[email protected]> >> >> 1-888-SOFT-440 or 1-888-763-8440 >> Reyburn CyberTuner, Inc. >> http://www.cybertuner.com <http://www.cybertuner.com/> >> _______________________________________________ >> Do not post admin requests to the list. They will be ignored. >> Coreaudio-api mailing list ([email protected] >> <mailto:[email protected]>) >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/coreaudio-api/mman%40martinman.net >> <https://lists.apple.com/mailman/options/coreaudio-api/mman%40martinman.net> >> >> This email sent to [email protected] > 1-888-SOFT-440 or 1-888-763-8440 Reyburn CyberTuner, Inc. http://www.cybertuner.com
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