这听起来很熟悉吗？您想开始播客。你的预算有限。您已经决定使用GarageBand并找到了完美的麦克风，但经过一些研究后，您意识到使用两个麦克风而不是一个麦克风会显着改善音质。问题是GarageBand无法识别辅助输入。
将两个不同的麦克风连接到您的计算机似乎应该很容易，但它并不像看起来那么简单。即使您确实连接了两个单独的麦克风，也可能会得到两个单独的音频流。
以下是如何将来自两个单独麦克风的输入记录到单个音频流中。另外，请查看我之前关于使用GarageBand 录制真实乐器演奏的(GarageBand to record a real instrument playing)帖子。
如何将两个麦克风连接到 GarageBand
GarageBand只能识别单个输入，但可以使用两个单独的设备进行录制。你只需要欺骗程序认为两个连接是一个。这是如何做到的。
1. 打开 Finder 并选择Go > Utilities，或在Finder打开的情况下按Command + Shift + U
2. 打开音频 MIDI 设置(Audio MIDI Setup)应用程序。
3. 在屏幕左下角，点击“ + ”。
4. 选择创建聚合设备(Create Aggregate Device)。
5. 当你这样做时，一个新的聚合设备将出现在上面的列表中。双击(Double-click)设备名称进行重命名。
6. 选择此设备后，您将在“音频设备(Audio Devices)”窗口中看到所有可用音频设备的列表。选择要使用的输入。您将选择要使用的两个麦克风，但记下您选择它们的顺序。它们被选中的顺序决定了系统查看输入的顺序。
7. 当您选择多个设备时，您可以选择时钟源。无需太技术性，这将是时间所基于的音频输入。选择时钟速度最可靠的源。
8. 当您选择了要使用的两个麦克风后，退出音频 MIDI 设置(Audio MIDI Setup)。
在GarageBand中选择聚合设备(Aggregate Device)
现在您已经创建了一个聚合设备，是时候回到GarageBand并选择合适的设备了。
1. 转到文件(File)>新建(New )并选择您要使用的项目类型。
2. 查看左下角并单击详细信息(Details)旁边的箭头。
3. 单击输入设备(Input Device)并从列表中选择聚合设备。
4. 选择您要使用的输出设备。注意：您不想使用内置输出(Built-in Output)，因为它会导致录音中的音频失真。相反，请使用耳机或其他输出源。
5. 单击选择(Choose)。
6. 接下来，转到GarageBand > Preferences并选择 Audio/MIDI。
7.从输入设备(Input Device)菜单中选择聚合输入。(Aggregate Input)
8. 从那里，导航回GarageBand屏幕并按下Smart Controls按钮（或直接按下 B 键。）
9. 在Smart Controls菜单中，选择Input并从列表中选择Aggregate Device（如果尚未选择）。
通过这一步，您应该已准备好从两个麦克风录制。但是，仍然可能出现一些问题。如果您有两个相同的USB麦克风，则可能很难让计算机将它们识别为单独的设备，因为它们的数字签名相同。使用不同类型的麦克风可能更容易实现这一点。
如果您尝试录制并发现其中一个麦克风无法正常工作，请不要犯我们犯过的错误并重复上述每个步骤 - 无论如何，不要一开始。第一步应该是检查第二个麦克风是否已打开。恭喜，祝录音顺利。
How to Record Using Two Different Microphones in GarageBand
Doeѕ this sound familіar? You want to start a podcast. Yоu’re on a budget. You’ve already decided tо use GarageBand and found the perfect mic, but after a little bit of research, you realize the sound quality would be significantly improved using two microphones instead of one. The problem is that GarageBand won’t recognize the secondary input.
It seems like it should be easy to connect
two different microphones to your computer, but it’s not as straightforward as
it seems. Even if you do connect two separate microphones, you can end up with
two individual audio streams.
Here’s how to record input from two separate microphones into a single audio stream. Also, check out my previous post on using GarageBand to record a real instrument playing.
How to Connect Two Microphones to GarageBand
GarageBand only recognizes a single input,
but it is possible to record using two separate devices. You just have to trick
the program into thinking two connections are one. Here’s how to do it.
1. Open Finder and choose Go > Utilities, or hit Command + Shift + U with Finder open.
2. Open the Audio MIDI Setup application.
3. At the bottom left corner of the screen, click the “+.”
4. Choose Create Aggregate Device.
5. When you do this, a new aggregate device
will appear in the list above. Double-click the device name to rename it.
6. With this device selected, you will see a list of all available audio devices in the Audio Devices window. Select the inputs you want to use. You would select the two microphones you want to use, but make note of the order you select them in. The order they are checked determines the order the system will view the inputs.
7. When you select multiple devices, you
will have the option to select the clock source. Without getting too technical,
this will be the audio input the time is based on. Choose the source with the
most reliable clock speed.
8. When you have selected the two
microphones you intend to use, exit from the Audio MIDI Setup.
Choosing the Aggregate Device in GarageBand
Now that you’ve created an aggregate
device, it’s time to go back into GarageBand and select the proper device.
1. Go to File > New and select the type of project you wish to use.
2. Look in the bottom left corner and click on the arrow beside Details.
3. Click Input Device and select the aggregate device from the list.
4. Choose the output device you want to
use. Note: you do not want to use the Built-in Output, as it can cause audio
distortion in the recording. Instead, use headphones or another output source.
5. Click Choose.
6. Next, go to GarageBand > Preferences and select Audio/MIDI.
7. Select Aggregate Input from the Input Device menu.
8. From there, navigate back to the GarageBand screen and press the Smart Controls button (or just hit the B key.)
9. In the Smart Controls menu, select Input and choose Aggregate Device from the list if it isn’t already selected.
And with that step, you should be set up
and ready to record from two microphones. There are still a few issues that may
arise, however. If you have two identical USB microphones, it can be difficult
to get the computer to recognize them as individual devices because their
digital signatures are identical. This may be easier to pull off using separate
types of microphones.
If you try to record and find one of the
microphones isn’t working, don’t make the mistake we did and repeat every step
above—not at first, anyway. The first step should be to check that the second
microphone is turned on. Congratulations, and good luck with recording.
