No Audio When Set to Built-in Line Output

I have my FCP audio setting (found under Audio/Video settings) set the same as my system settings, "Built-in Line Output" for Audio Playback. I get no sound, to my external speakers, when playing a clip with this setting. If I switch to "Built-in Output" it plays fine through my tower's built-in speaker. I've reset and rebooted and nada, what am I over looking?
Edit in: BTW, all other wares play fine through my external speakers.
Thanks

I think you answered your own question. All audio should be AC3.

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Can't select "Built-in Line Output" in Audio/MIDI prefs

I have audio on my MacPro going out "Built-in Line Output" via the mini-jack at the back to a receiver. Everything works fine.
When I open GarageBand's preferences to set up Audio Output it has defaulted to "Built-in Output" (the little speaker and jack in the front) and is grayed out, I can't select "Built-in Line Output" to send GarageBand's audio out the mini-jack at the back.
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HangTime, Thanks for the replies and link.
The problem has solved itself, which is good, but I have no idea why or how, which is mildly off putting.
I went into system prefs and set the Sound output to "Built-in Output," thinking maybe that would "free up" Built-in Line Output for GB, which doesn't make sense, but whatever, none of it made sense. That had no effect in GB, same situation. So, I switched the system prefs back to "Built-in Line Output" and left things for a bit.
Then the next time I went into GB everything was fine. The pull down menus were available and I could select "Built-in Line Output." Weird. [insert head scratch here]

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Esteemed fellow editors,
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Hi Mechguy,
My name is Humphrey and I am an Applications Engineer at National Instruments.
Have you tried the Watchdog Timers VIs (http://zone.ni.com/reference/en-XX/help/370466V-01/mxdevconsid/watchdogtimers/)? You can find the functions under Measurement I/O » NI-DAQmx » Dev Config » Watchdog
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Hello Apple Community,
As my first post to the community, I would like to shed some light on an issue I have found no answer to on the internet or support lines. I have spent a great deal of time self-diagnosing and over the phone with technical support for all devices in question.
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Please voice your vote at this link:
https://bugzilla.mozilla.org/show_bug.cgi?id=560901
You will need to logon/register.

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seanyo888 wrote:
No audio when i playback a project.
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Hi
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/___sbsstatic___/migration-images/migration-img-not-avail.png
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Has anyone experienced the loss of audio when using Apple TV when it has been working fine?

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Hi there Vfall!
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Make sure the volume on your TV or receiver is turned up and isn't muted.
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Apple TV: Basic troubleshooting
http://support.apple.com/kb/ht1551
Thanks for coming to the Apple Support Communities!
Regards,
Braden

HT204368 I recently upgraded from an iPhone 4s to an iPhone 5. I have a Motorola HX550 Bluetooth Headset which worked flawlessly with the iPhone 4s. However, since upgrading to the iPhone 5, I frequently lose audio when in the middle of a call. I am no

I recently upgraded from an iPhone 4s to an iPhone 5. I have a Motorola HX550 Bluetooth Headset which worked flawlessly with the iPhone 4s. However, since upgrading to the iPhone 5, I frequently lose audio when in the middle of a call. I am not certain whether it is a full disconnect or just an audio loss. The person on the other end reports still being able to hear me, however, I suppose they could hear me speaking over another source even if bluetooth disconnected. The loss of audio is always preceded by a quick shrill noise, so I can easily tell when it happens. All I have to do to fix the problem is to select Audio Source on the call screen, temporarily switch audio back to the iPhone, and then switch back to the headset, and then it starts working again.
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https://forums.motorola.com/posts/94ac15ad7c
If you go to the Plantronics website and look at the "Ratings and Reviews" on the Voyager Legend you will see the same issue reported:
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here is an interesting thing: take the iphone and set lock screen to never. Now make an email with siri--be sure to activate her with call button. get to the body and get some text in there. then just stop talking. LOCK SCREEN APPEARS!!!!!! and of course you draft is gone.
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Siri seems to behave properly with scenerio above---sans call button. She does not go to lock.

No Audio When Set to Built-in Line Output

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