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5

Try plugging in a headset and unplugging.


2

I'm assuming you're talking about AirPlay Screen Mirroring from a Mac to an Apple TV. In that case, yes, you are loosing signal quality from compression-before-transmission and decompression-after-reception. In particular, the audio part of the AirPlay Screen Mirroring is compressed using the AAC-ELD codec to ensure low-latency sound encoding. However, ...


2

Any line-level input should work with the 15-inch Mid 2012 MacBook Pro (the MBPr is slightly different.) Simply insert it into the audio in port on your MacBook Pro using a 3.5mm jack. Line level simply refers to relatively amplified analog signal. Not all microphones provide this: if necessary, you may need to use an amplifier. I'm not sure why the ...


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Does anyone else have access to your iCloud account? If they do, they can play a loud noise using Find My Mac. If you've recently received an email notifying you that someone has signed into your iCloud account using a web browser, that would be an excellent sign that the Find My Mac siren is what you're hearing. Another possibility: Did you install Prey ...


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The most likely explanation for this is that you have multiple sound output devices. When you mute, only the current output devices is muted — the rest are not. The next time you hear a sound when you think you shouldn't, go to Sound Preferences > Output and check your Output devices one by one. It's almost certain that at least one of them isn't muted (a ...


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It's not possible to have group call with Facetime Audio at this time. Apple used to have this feature in iChat but removed it because it was a poor experience. There are other third-party apps that have this type of feature and those might fit your needs. EDIT: Adding additional info from the discussion in comments. The date of that article was June ...


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I was having this problem with some VBR MP3s I ripped a decade ago with LAME 3.92. The problem went away when I converted them to fixed rate MP3s in iTunes (File > Convert) iTunes 12.4.1.6, Mac OS X 10.11.5



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