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Are the internal speakers shut off -- or not?

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AES

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Oct 26, 2009, 10:48:53 AM10/26/09
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Suppose you're operating a MacBook with the internal speakers set to
maximum volume, but with some audio cable plugged into the headphone
output.

The volume of the output speakers then drops to zero -- unless you shut
down your MacBook (with the audio peripheral still plugged in) and
restart it using the power button -- in which case the startup "Bong!"
comes out of the speakers at full volume.

Not something of major significance, really, just an oddity -- unless
you do it in the middle of the night, in a darkened airline cabin, with
everyone else around you asleep, or trying to get to sleep.

Gerry

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Oct 26, 2009, 11:05:47 AM10/26/09
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In article <siegman-8BFF08...@news.stanford.edu>,
AES <sie...@stanford.edu> wrote:

Hit the mute button before shutting down, then there won't be a Bong,
unless your holding stuff we don't know about.

Wes Groleau

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Oct 26, 2009, 11:53:45 AM10/26/09
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Gerry wrote:
> Hit the mute button before shutting down, then there won't be a Bong,
> unless your holding stuff we don't know about.

What _are_ you holding in your bong?

--
Wes Groleau

An example of how important grammar points are deferred
http://Ideas.Lang-Learn.us/barrett?itemid=1560

Jolly Roger

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Oct 26, 2009, 12:10:22 PM10/26/09
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This is just the sort of thing Psst addresses, BTW:

<http://www.satsumac.com/Psst.php>

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Paul Magnussen

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Oct 26, 2009, 12:40:48 PM10/26/09
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Sounds like a bug to me: every Mac I've used (which doesn't include a
MacBook) puts everything to the connected speakers/headphones, including
the output bong. It is, as you point out, vital if you don't want to
wake your wife up.

Paul Magnussen

AES

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Oct 26, 2009, 8:07:14 PM10/26/09
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In article <7oudnbeNU6yPTHjX...@earthlink.com>,
Paul Magnussen <magic...@earthlink.net> wrote:

> AES wrote:
> > Suppose you're operating a MacBook with the internal speakers set to
> > maximum volume, but with some audio cable plugged into the headphone
> > output.
> >
> > The volume of the output speakers then drops to zero -- unless you shut
> > down your MacBook (with the audio peripheral still plugged in) and
> > restart it using the power button -- in which case the startup "Bong!"
> > comes out of the speakers at full volume.

> Sounds like a bug to me: every Mac I've used (which doesn't include a

> MacBook) puts everything to the connected speakers/headphones, including
> the output bong. It is, as you point out, vital if you don't want to
> wake your wife up.

I have a pair of small powered speakers cabled to the audio output jack
of my MacBook [1].

If I shut down and then restart the MacBook, either by doing a Shut Down
from the Apple menu and then pressing the power button or by doing a
Restart from the Apple menu, while leaving the speakers plugged in and
powered on, the speakers go silent once the power is off.

As soon as the power comes back on. and about the time the screen lights
up, the _MacBook_, not the speakers, makes a loud Bong!, and the
speakers simultaneously start to hum (presumably some kind of 60 cycle
or other pickup).

Some seconds later, just a second or two after the screen suddenly turns
blue, and just before the Mac OS X box appears, the speakers go quiet.
This seems to be clearly the point where the machine has gotten
sufficiently awake to sense that something is plugged into the headphone
jack; shut off the internal speakers; and start delivering audio to the
jack instead.

I don't really see this as a bug; seems more like just an incidental
oddity to me.

[1] For the record, the speakers are actually a Logitech powered iPod
player, which can also be used as an external speaker pair. They sit on
a shelf beside my desk, with the MacBook audio turned full up but the
speakers normally powered off since I normally don't want any audio. I
can then turn them on using a small remote that comes with the Logitech
unit when I want to play a video or otherwise need audio. Works for me.

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