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Re: Speaker Audio when Headphone connected?
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Re: Speaker Audio when Headphone connected?


  • Subject: Re: Speaker Audio when Headphone connected?
  • From: "Mikael Hakman" <email@hidden>
  • Date: Sat, 23 Feb 2008 18:29:32 +0100
  • Organization: Datakonsulten AB

Being exclusive is one thing, being able to direct audio to either, even when something is plugged in, is another thing, as Brian points out.
 
Things aren’t as simple as unplugging the headphones IRL. First, as Paul says, the User may forget to unplug them. Second, the headphones jack doubles as digital optical out connector on MB, MBP, and iMac. While you want your media audio (Pro Apps, iTunes, DVD, Front Row etc) directed to your home theatre or monitoring system using optical link, you don’t want the system beeps, iChat calling and conversations etc go the same way because a) your home theater or monitoring system is not always on, and b) you don’t want to be exposed to a system beep etc. at 90 or more dB. AC/DC at 100 dB is all right (if that is your kind of music) but TADA at the same level is not, if you get my drift.
 
Inability to treat built-in speakers (used for system sounds) and built-in out connector (using analog or digital cable for media audio) as two separate, let be mutually exclusive, interfaces is very inconvenient. In non-mobile installations, in particular when using iMac where the connector is on the back and therefore not easily accessible, it is simply not practical.
 
If the actual hardware design permits such treatment (and there are indications that it does) then IMHO there is no good reason not to make it accessible both to the users and the developers.
 
On February 23, 2008 4:15 AM, Jeff Moore wrote:
The speakers and the headphones are mutually exclusive. Whether this is because of hard wiring or flipping bits in a register somewhere really doesn't matter. This is just another one of the facts about the hardware you have to deal with. There's no secret back door to make it work different.

If you don't want the sound coming out of the headphones, just unplug them.

On Feb 22, 2008, at 7:03 PM, Brian Willoughby wrote:

I think that what is being asked for here is the ability to turn off the headphones even though something is plugged in.  It is understood that both speakers and headphones cannot be driven at the same time.  The question is whether the switch is mechanical, making it impossible to turn on the speakers if a headphone jack is inserted, or if the switch is electronic, meaning that it can be overridden in software to direct the audio to one or the other under user control.  Seems like if the boot chime can be directed to the speaker even when a headphone jack is in place, then it should be possible to direct other audio to the speakers in the same situation.
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References: 
 >Speaker Audio when Headphone connected? (From: "Paul Haddad" <email@hidden>)
 >Re: Speaker Audio when Headphone connected? (From: Jeff Moore <email@hidden>)
 >Re: Speaker Audio when Headphone connected? (From: "Paul Haddad" <email@hidden>)
 >Re: Speaker Audio when Headphone connected? (From: Jeff Moore <email@hidden>)
 >Re: Speaker Audio when Headphone connected? (From: Brian Willoughby <email@hidden>)
 >Re: Speaker Audio when Headphone connected? (From: Jeff Moore <email@hidden>)

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