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Re: Multiple instances of an Audio Device
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Re: Multiple instances of an Audio Device


  • Subject: Re: Multiple instances of an Audio Device
  • From: Jeff Moore <email@hidden>
  • Date: Mon, 26 Aug 2002 12:29:25 -0700

The HAL creates a device for each IOAudioEngine a given IOAudioDevice has. In your case, I would expect to see a separate IOAudioDevice (with however many engines your devices have) for each card in the box.

On Friday, August 23, 2002, at 10:19 PM, Devendra Parakh wrote:

Hi,

We have an audio device driver (kext) for a PCI sound card that works
fine as long as we have one instance of the device.

When I plug in two of these cards - two instances of the driver objects
are created, initialized, etc.. Everything seems to work fine, except
that the CoreAudio HAL only reports the first instance.

Can anybody tell me what I need to do to get the second instance
recognized by CoreAudio?

Thanks.

Devendra.
Devendra ParakhSinging Electrons, Inc.http://www.singingelectrons.com425-889-2478
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--

Jeff Moore
Core Audio
Apple
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