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USB Device Transport Type

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USB Device Transport Type

Subject: USB Device Transport Type
From: Cobey Gatos <email@hidden>
Date: Tue, 28 Aug 2007 16:50:42 -0400

What are the possible issues involved in declaring the device transport type for a USB audio driver "kIOAudioDeviceTransportTypeOther" instead of "kIOAudioDeviceTransportTypeOther"? I understand that timestamps are handled slightly differently for USB devices, and I am wondering how important this difference is.

I ask because I have discovered that some applications, or at least Cubase, will impose bandwidth limitations on my driver that prevent it from working if I declare the device transport type as "kIOAudioDeviceTransportTypeUSB". Declaring the device with transport type "kIOAudioDeviceTransportTypeOther" works around the problem.

Also, are there any plans to add a USB 2.0 transport type to the device connection type defines?

Thanks.

Cobey
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