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I have been using Virtual DJ on my machine. The setup is where I want audio to play over the headphones and use a USB sound card to play audio into my headphones so I can listen to music before I play it for everybody.

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However, the last time I tried, I got an error message saying "Error in the sound driver of Core Audio. Your sound card is probably not connected, or the settings are incorrect".

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If I use the headphone by themselves, the USB sound card by itself, or my speakers by themselves, they all work individually.

How do I go about figuring out what's wrong here?

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When was the last time that you updated the app or the drivers? Does the app update itself automatically? – EBGreen Sep 13 '12 at 19:19
I do not know how to update the driver. I would appreciate instruction on it, though. The app is set to NOT update itself automatically. – Raj More Sep 13 '12 at 19:25
Sorry, I'm not a Mac guy so not sure. Those are just standard questions that you would want to answer for an issue like this regardless of the OS. – EBGreen Sep 13 '12 at 19:31

I have the same problem. This happened once I upgraded my OS. I work around it by going into the system preferences - sound - and selecting the USB Audio. Then, I open Virtual DJ. Click on config - sound setup. Then select how you want you audio to play.

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up vote 0 down vote accepted

I went into the MIDI setup and deleted the entry for Virtual DJ - everything worked fine from that point on.

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