Can I ask what data type you are using for your samples? I replaced all references to AudioUnitSampleType with float this morning. That gets me correct playback on iOS8, but on iOS7 I get overloaded noise. On iOS7 AudioUnitSampleType was working, as was SInt32.
I’m running this on 2 iPads with the two iOS’s. Testing the arch with #if __LP64__ shows 32-bit for both devices. I can try switching to a fixed width int as per Doug Wyatt;s suggestion. My preference is to find a structure that will run on both iOS’s. rob > On Jan 11, 2015, at 8:31 PM, Dave O'Neill <[email protected]> wrote: > > Are there any other audio units in your chain? Be sure to set the output > ASBD of each audio unit to the input ASBD of the audio unit it is connected > to (downstream). Just as a troubleshooting technique you can try putting > AUConverters between various audio units to see if that fixes things. Maybe > you could post your ASBD and we can spot an issue. Instead of using > AudioUnitSampleType just find out what it is typedef'd to and substitute it > with that ( you can just highlight it and "jump to definition" in Xcode). > All of the iOS8 specific issues I've had were all traced back 32-64 bit > issues. Here is a handy guide that points out some common gotchas: > https://developer.apple.com/library/ios/documentation/General/Conceptual/CocoaTouch64BitGuide/ConvertingYourAppto64-Bit/ConvertingYourAppto64-Bit.html#//apple_ref/doc/uid/TP40013501-CH3-SW1 > > <https://developer.apple.com/library/ios/documentation/General/Conceptual/CocoaTouch64BitGuide/ConvertingYourAppto64-Bit/ConvertingYourAppto64-Bit.html#//apple_ref/doc/uid/TP40013501-CH3-SW1> > > > On Sun, Jan 11, 2015 at 5:00 PM, Matt Hart <[email protected] > <mailto:[email protected]>> wrote: > I haven't tested with m4a lossless, but I have played about 14 or so lossless > wav simultaneously as well as that many m4a compressed files. They are all > buffered though. > > On Jan 11, 2015, at 7:08 PM, Robert Carroll <[email protected] > <mailto:[email protected]>> wrote: > >> Hi. >> >> Thanks. I am doing that with the same function call. >> >> Further investigation is pointing to some other issue. My code that reads >> the ExtAudioFile objects is playing single m4a files, but not multiple files >> set up on different mixer buses. I was testing with a single A440.if file >> then with 3 m4a lossless files for C4, E4, G4 which should play >> simultaneously. >> >> On iOS 7 it works, on iOS 8 I get a brief burst of vicious white noise. >> >> I’m inclined to think this is back to the storage type for the sample data. >> Since, I haven’t found an answer to a replacement for the >> AudioUnitSampleType on iOS, I had reverted my code to using that type. >> >> rob >> >>> On Jan 11, 2015, at 6:25 PM, Matt Hart <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> I use this with iOS 8 and 7 without any issues. Did you set the expected >>> client data format onto the audio file property? >>> >>> status = ExtAudioFileSetProperty(_audioFile, >>> kExtAudioFileProperty_ClientDataFormat, sizeof(_targetAudioDescription), >>> &_targetAudioDescription); >>> >>> >>> On Jan 11, 2015, at 1:56 PM, Robert Carroll <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>>> I am attempting to narrow down the options why my audiograph code is >>>> failing on iOS 8. >>>> >>>> I am using ExtAudioFileRead to extract data from applelossless source >>>> files and load structs set up for this purpose. >>>> The buffers and audioData parts of the struct are typed as >>>> AudioUnitSampleType. >>>> >>>> All of this works as it should on iOS’s up to 7.x. Running on iOS 8.1.2 I >>>> can play aiff source files with this code but get distortion if I load the >>>> m4a (lossless) files. >>>> >>>> What changed in iOS 8 with extaudiofile that would account for this issue? >>>> >>>> thanks >>>> >>>> rob >>>> >>>> >>>> Robert Carroll >>>> RSM Records >>>> Toronto >>>> http://www.rsmrecords.com <http://www.rsmrecords.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/matt%40matthart.com >>>> <https://lists.apple.com/mailman/options/coreaudio-api/matt%40matthart.com> >>>> >>>> This email sent to [email protected] <mailto:[email protected]> >> > > > _______________________________________________ > 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/oneill707%40gmail.com > <https://lists.apple.com/mailman/options/coreaudio-api/oneill707%40gmail.com> > > This email sent to [email protected] <mailto:[email protected]> >
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