Can't hear playback with USB audio interface plugged in

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Level 1

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Can't hear playback with USB audio interface plugged in

I start Logic Pro 8 and then plug in Lexicon Lambda for a USB interface between guitar and macbook pro. With the Lambda plugged in I hear nothing from mac or headphone input on Lambda. If I unplug Lambda I can hear playback from mac just fine thru speakers or headphones.

Very appreciative of any advice on how to solve this.

Thanks.

MacBook Pro, Mac OS X (10.5.6), MacBook Pro

Posted on May 25, 2009 8:34 AM

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Answer 1

Foxboy71

Level 4

2,378 points

May 25, 2009 10:47 AM in response to berkleyrob

Searcheth thou this forum for the magic word "aggregate device", and lo, thou findeth the answer!

Fox

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Answer 2

berkleyrob Author

Level 1

0 points

May 25, 2009 5:16 PM in response to Foxboy71

Thanks but after following steps to add the aggregate device I still can't get audio from laptop with usb interface plugged in. I am logged in as admin.

Any other advice?

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Answer 3

Pancenter

Level 6

14,782 points

May 25, 2009 9:24 PM in response to berkleyrob

berkleyrob wrote:
I start Logic Pro 8 and then plug in Lexicon Lambda for a USB interface between guitar and macbook pro. With the Lambda plugged in I hear nothing from mac or headphone input on Lambda.

Unplug your audio interface, reboot the Mac, plug the USB interface in, let it be recognized. Open Audio/MIDI Setup (in utilities) see if the Lambda shows up as an input and output device.

Yes/No?

If yes, you don't have to select if for any of the Input/Outputs, Logic's audio interface selection operates independently from the system.

Open Logic go to "Preferences/Audio) select the Lexicon or Lambda interface as the default unit, set audio buffers to 256.

Anything yet.

All audio I/O will be coming from the lexicon the Mac's audio system is now out of the equation.

pancenter-

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