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Strange error when dynamically creating aggregate devices
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Strange error when dynamically creating aggregate devices


  • Subject: Strange error when dynamically creating aggregate devices
  • From: Stéphane Letz <email@hidden>
  • Date: Fri, 2 Apr 2010 09:23:59 +0200

 Hi,

We get a bug report on the following machine:

Macbook Pro Unibody, 2.8GHZ;
RAM: 4G
OSX 10.6.2

when creating an aggregate device with "built in mic" and "built in output"

After creating the new aggregate device, it is filled up with the input/output device with the following code :

 pluginAOPA.mSelector = kAudioAggregateDevicePropertyFullSubDeviceList;
 pluginAOPA.mScope = kAudioObjectPropertyScopeGlobal;
 pluginAOPA.mElement = kAudioObjectPropertyElementMaster;
 outDataSize = sizeof(CFMutableArrayRef);
 osErr = AudioObjectSetPropertyData(*outAggregateDevice, &pluginAOPA, 0, NULL, outDataSize, &subDevicesArray);
 if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioObjectSetPropertyData for sub-device list error");
        printError(osErr);
        goto error;
 }

And we get the "kAudioHardwareBadObjectError" error.

This is the only case we got up to now.

Any idea on what could be the reason?

Stephane Letz



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