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Control iTunes with iPhone headset
Authored by: sweyhrich on Dec 03, '08 08:37:01AM

Likely this also works on the late 2008 MacBooks as well. This may account for a feature on my MacBook that I had not seen mentioned elsewhere. The headphone (audio output) jack is "smart", compared to a typical headphone jack.

On my PowerBook G4, plugging in a cord to headphones or an external amplifier worked the same as it would if I plugged it into any radio made from the 1950s onward; it disconnected the internal speaker and directed the output signal to what was plugged in.

On my MacBook, however, I find that when I plug in something to the audio port, it does stop output from the speakers (with one exception I'll mention in a minute), but it does so at a unique volume setting. That is, if I have the volume turned all the way down on the computer, the volume in the headphones will be at whatever level it was last set at when it was used. When I unplug the headphones, the speaker volume on the computer will return to what it was set at before the headphone was plugged in.

Interestingly, the startup tone that plays during a restart <i>still</i> plays through the internal speakers <i>even</i> if there are headphones plugged in.

Since this audio port is so "smart", I would imagine that it also responds to the controls on the iPhone headset.

---
Steven Weyhrich
http://apple2history.org



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Control iTunes with iPhone headset
Authored by: krusty76 on Dec 03, '08 01:27:19PM

That functionality (the separate volume memory for audio out) has been in effect for at least a few generations.

Unfortunately, as pointed out by the first response, this new headphone control is absent from my late 2007 model MBP.



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Control iTunes with iPhone headset
Authored by: PCheese on Dec 04, '08 01:46:29AM
Interestingly, the startup tone that plays during a restart still plays through the internal speakers even if there are headphones plugged in.

It didn't before. I think Apple rethought the startup chime:

  • more and more Macs are plugged into (potentially really loud) external speakers, TVs, etc
  • always having it come from the internal speaker simplifies troubleshooting - one of the primary reasons for the existence of the startup tone


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Control iTunes with iPhone headset
Authored by: owsla on Dec 04, '08 08:42:24AM
I use a great, simple preference pane to keep the startup sound from being too loud:
http://www5e.biglobe.ne.jp/~arcana/software.en.html#StartupSound

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