1、长时间的FaceTime视频通话会很快将iPhone 4中的电量耗尽，在试用中，用于测试的iPhone 4在测试前有40%左右的电量，但是在大约30分钟断续的视频通话. 3月20在福利社购的ME 664，软件使用一切顺利唯有Imessage和facetime不能使用，本人Mac小白一个，虽然对windows非常熟悉，但对Mac是大姑娘上花轿头一回，因对facetime有经常性需求，无奈求助Macx，甚至genius bar都去过了，他们的建议是可能插件冲突，建议重装lions，个中原因不解释，最后我选择先等等看看。.

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Hi, I would like to mirror the audio output from my mac mini to the built-in output and an airplay speaker. Therefore I added a Multi-Output Device containing the Built-in- and Airplay output, as soon as I activate the airplay speaker the sound is mirrored but unfortunately always with a crackling sound coming of the speakers set as 'slave Device'. Only the Device set as 'Master Device' has clear sound, doesn't matter if it's the airplay speaker or the speaker (or headphone) directly connected to the built-in output. I've tested this with a mac mini and an mac book air as audio source, same problem.

Both were running Mac OS V. Does anyone have an idea what I'm doing wrong?

Greets Chris. I'm using a 2011 Macbook Pro running Mavericks and current Apple TV ( MD199HK/A 3rd generation) when trying to output audio to both Apple TV and built-in output simultaneously I suffer crackling and popping. I have this issue once I use Audio MIDI Setup (under utilities) to create a Multi-Output Devise. Once I use this multi-output devise made up of Apple TV and Built-In Output to get my music to both output devises at once BUT I get crackling sound on either Spotify or iTunes. I've worked around this issue by using AirParrot. I select Apple TV in AirParrot with Audio enabled. The Apple TV then takes all audio output, then I select the 'Multi-Output Devise created in 'Audio MIDI Setup' and I have playback through Apple TV and Built-In Output without any crackling or popping.

Only minor outstanding issue is that whatever scenario I then run Audio Midi Setup in terms of setting various devises as Master Clock and resampling of sub devise I can't perfect the sync between Apple TV audio output and my local Macbook Pro, but close enough with the slightest hint of echo. Epub converter app for mac. Plenty of forums discussing Word Clock sync which is out of my league. Un-ticking drift correction on the 'AirParrot' audio output has them close enough, depends on how easily you can hear your apple TV output from the room where your Macbook Pro is and vice versa.

Morning all, Found a solution to play sound through multiple devices WITHOUT the scratchy, fuzzy, or clicking sounds. • Open > Audio MIDI Setup • Add new device with the ' +' in the bottom left corner of the window • Click ' Create Aggregate Device' — Something is wrong with the 'Create multi-output device' option, so don't use that. • Add the two (or more) devices you want to use as part of the new aggregate device. In my case, I'm trying to get audio to play through both the audio jack in my MacBook and wirelessly to a set of Bluetooth speakers. Notice, some of the devices will show up more than once if they have their own built in microphones, one as an 'input' device and another as an 'output' device.

If you're trying to play music to them, add the device with output channels. • At this point, audio will go to one device (if the devices are stereo), because it is outputting audio to only two channels, instead of the (in my case) four channels: two channels through the audio jack, and two channels through the Bluetooth speaker. • In the bottom right hand corner, click the ' Configure Speakers.' • Click the ' Multichannel' button • In the dropdown menu, select ' Quadraphonic' • Check both devices at the top of the box, and the mac will set you up with four outputs to send audio to all devices.

Honestly, I don't know if all channels are being played. I think what's happening is each device is either right or left audio, and the '3' and '4' channels just aren't being played. But, it's better than hearing fuzz. Also, from time to time, there is a little crackle, but very minimal, and only once in a while.