Apogee miniDAC and Sound output

There is no sound output from the Apogee miniDAc after the MacPro (2013) awakens from sleep. Sound output does occur if the internal Mac Pro speakers are selected. A restart will allow the Apogee miniDAC to function normally. In searching the threads regarding similar topics, it appeared that this occured with fusion drives. However others have reported similar problems with SSD.
Is this a Mavericks issue? My Apogee miniDAC is connected to the computer via USB.
I would like to maintain the miniDAC since it does provide the interface to my preamp and speakers.
Thank you.

This seems to be a bug with digital audio output via USB. I am not sure if there is a fix or whether you're gonna have to wait for a Software Update to be released by Apple.
BTW: I've always wondered whether this kind of solution gives you better audio out that using the analogue out (i.e. headphone port on the Mac Pro).
Obviously Toslink would be another option but I understand that you are not willing to spend money on hardware to do the same thing differently...
EDIT: Does that thing not have a Toslink input? May be worth a try if you have a 'cable' lying around for that (you'd need a 3.5mm optical adapter for that port though).

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Hello,
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Can somebody help?

Hi,
I mean that program paused due to Sound Write pause. And the only way to continue dataflow is Play Sound function. But I need to interrupt playing and perform new one with new settings. I've attached two screenshots to clear situation.
Attachments:
Sound11.jpg ‏26 KB
Sound21.jpg ‏28 KB

Interrupt sound output

I am writing a one minute sound file to the sound card using the Labview 2011 Sound Output Write vi. The sound starts to play and there doesn't appear to be any way to stop it until the entire file has played. Not even the Abort Execution button will stop it. I have looked at the KB article called Stopping a Sound File during Playback, but it was written a long time ago before Sound Output Write became available.
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Solved!
Go to Solution.
Attachments:
example.zip ‏1625 KB

Gerd,
Thanks for taking an interest in my problem. But you miss the point entirely.
Here is what labview help says about Sound Output Stop:
"Stops the device from playing sound from the buffer. Use the Sound Output Clear VI to clear the data in the buffer."
Well. It doesn't. In fact it doesn't do anything. It is totally useless. I posted my query in the hope that I was missing something and that someone could show me what it was.
I think you will agree that Sound Output Clear.vi doesn't work. I think that is a bug, don't you?
You state that Sound Output Write VI uses an uninterruptible system DLL call. Bug number 2?
You suggest breaking up the sound output file into a series of very short writes so that I can stop where I want. I agree that that will work. But shouldn't Sound Output Write do that for me if Labview is to provide an interruptible sound output capability?
Now as far as violating Labview data flow niceties, yes, I was in a hurry and I was just trying to create something which would demonstrate the problem. If you want, move the Sound Output Write into the loop and you will see the exact same result.
I have an old PC with Labview 7.1. I'm going to fire it up and see if the old sound VI's have the same problem.
Regards,
David

Hello, I just bought a 2013 Mac mini and I cannot get the sound to output to my Dell U2713HM monitor. I went to sound output but even though my Dell shows up there when I select it there is no sound output to it. I am using a mini DP to DP cable...

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Might I recommend the following sample code instead?
[http://www.jsresources.org/examples/MidiNote.html]

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Mega stick.
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this is not my area but it could be a good idea to post what the equipment is.
have you tried the latest drivers from http://www.nvidia.com ?[/quote]
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Apogee miniDAC and Sound output

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