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Re: AU Lab says "Audio input not supported" for builtin hardware on Intel Mac Pro

Okay, I stumbled onto the need to create an aggregate device, in the "Audio and MIDI" app.
And that is the answer to the mystery!

The Intel machines model their hardware devices differently -- as half-duplex. Thus the "input device" only has an input stream, and the "output device" only an output stream.

Some apps, such as AU Lab, want you to tell them which device to bind to, and expect the device to have bi-directional streams.

By rolling your own aggregate device, you present a meta-device to the clients, which behaves in the expected bi-directional manner.

Have fun,
-Rick






Begin forwarded message:

From: Rick Sustek <email@hidden>
Date: November 30, 2006 5:08:54 PM PST
To: email@hidden
Subject: AU Lab says "Audio input not supported" for builtin hardware on Intel Mac Pro

AU lab 1.0.3

I can't create an input strip, using the builtin hardware device on this machine. The input side shows up just fine in the "Audio MIDI Setup" app, just not in AU Lab. In the device setup sheet for a new document, the input stuff is greyed-out, and the message "Audio input is not supported" is printed there.

I searched this email list, but didn't find any hints that others have this problem.

What's up?

Thanks!
-Rick

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 >AU Lab says "Audio input not supported" for builtin hardware on Intel Mac Pro (From: Rick Sustek <email@hidden>)



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