Audacity是目前最好的音频编辑包之一，这使得它也完全免费成为一个奇迹。Audacity被专业人士和业余爱好者所使用，是录音工程师、播客^(podcasters)、音频恢复专业人士和其他任何需要处理音频数据 的人的首选软件。

一旦你知道你需要的一切都在哪里，它也不是那么难使用。问题是Audacity可能非常不直观，因此很难弄清楚如何执行常见操作。分割音频只是这样的功能之一。在本文中，我们将介绍在Audacity中拆分音频的几种不同方法，以及一些值得了解的重要技巧。

关于键盘快捷键的一句话

就像使用照片和视频编辑软件^{(video editing software)}一样，您最好学习最重要的键盘快捷键，而不是使用鼠标。许多音频编辑工作涉及执行数十甚至数百个重复操作，并且使用鼠标进行这些操作会严重减慢您的工作速度。因此，我们将为您提供鼠标菜单步骤和适用的键盘快捷键。

拆分音频剪辑

在Audacity^(Audacity)中拆分剪辑意味着您将连续的声音文件分成两部分。这样做有很多原因：

• 将要保留的剪辑与要删除的剪辑分开。
• 腾出空间插入新的音频。
• 增加或减少段之间的间距。
• 处理轨道的一个特定片段的音频。
• 去除不需要的声音。

在Audacity^(Audacity)中拆分音频剪辑的实际操作很简单：

1. 将指针移动到轨道上所需的分割点并按下鼠标左键^{(left mouse button)}。
2. 现在，选择编辑^{( Edit )}>剪辑边界^{( Clip Boundaries )}>拆分。^{( Split.)}

1. 或者，您可以简单地按Ctrl + I。

现在您可以独立选择新的剪辑部分。 

加入剪辑

如果您想再次将剪辑连接在一起怎么办？这基本上是相同的过程：

1. 选择要加入的音频。这必须是一段连续的轨道。
2. 如果要融合时间线上的所有剪辑，请使用Ctrl + A选择所有内容。
3. 现在，选择Edit > Clip Boundaries > Join。

现在所有的剪辑将再次成为一个单一的音频。

将立体声轨道拆分为单声道轨道^{(Stereo Track Into Mono Tracks)}

大多数麦克风^{(microphones)}以单声道录制，也就是说只有一个音频通道。但是，立体声麦克风或使用两个单独麦克风的录音机可以创建单个立体声轨道。

假设您使用两个麦克风录制了一个播客，并且每个扬声器的音频现在都被困在一个立体声轨道中。通过将其分成两个单声道轨道，您可以分别编辑每个轨道。

此选项不是您在Audacity^(Audacity)的主菜单结构中找到的选项，而是您需要从轨道下拉菜单中选择它：

1. 首先，选择要拆分为单声道的轨道的轨道下拉菜单，如此处所示。^{(track dropdown)}
2. 现在选择“将立体声拆分为单声道^{(split stereo to mono tracks)}”。

您会看到每个通道都变成了自己的单声道。

从这里开始，您可以将它们视为具有自己编辑和效果的单独轨道。

使用标签^(Labels)在Audacity中拆分音轨^{(Audio Tracks)}

这适用于所有想要使用Audacity作为记录和保存旧媒体^{(older media)}（如黑胶或盒式磁带）的方式的人。这些媒体被录制为一段很长的音频，但您可能希望将其拆分为轨道。

无需繁琐地拆分和导出这个大型录音的部分，您可以简单地标记每个轨道的开头，然后自动将每个标记的轨道导出为自己的文件。假设您已经按照自己的喜好清理并恢复了音频，以下是如何使用标签将其拆分为导出的曲目：

1. 选择“停止”按钮右侧的“跳至开始”按钮。^{(Skip to Start button)}

1. 选择Edit > Labels > Add Label at selection 然后给第一个轨道命名。

1. 现在使用选择工具，选择下一个剪辑开始的位置^{(position of the next clip’s beginning)}。
2. 再次，重复上述标记过程。对每个所需的轨道或剪辑执行此操作。

1. 您可以使用Ctrl + B来放置标签。
2. 现在，选择文件^{(File )}>导出多个^{( Export Multiple)}或按Ctrl + Shift + L
3. 选择导出的格式和位置。
4. 接下来，选择基于标签拆分文件^{(Split Files Based On Labels)}。
5. 在名称文件部分中，选择“使用标签^{(Using Labels)}”。

1. 选择导出^(Export)。

现在每个带标签的部分都将保存为一个单独的文件。系统会提示您按顺序为每个曲目添加元数据，只需在完成每个曲目的详细信息后选择“确定”（而不是“保存”）。^(OK)

用沉默删除 Ums 和 Aahs

准备录音时最重要（也是最乏味）的工作之一是去除不需要的噪音。如果是录音，例如播客或教学视频，则尤其如此。

当我们说话时，录音中可能会出现许多伪影。当某人不阅读脚本时，诸如 ums 和 ahs 之类的言语抽动很常见。这些可能会分散听众的注意力并降低录音的制作质量。您还需要消除过度的呼吸声、咂嘴声、吞咽声和其他大多数人可能不希望通过耳机直接进入耳朵的人类声音。

虽然您可以简单地选择该部分并将其删除，但这也会删除音频在您的轨道上占用的时间！这^(Which)意味着您可以缩短音轨并删除要保留的音频部分之间的空间。这是您可能想要做的事情，但如果不是，您可以简单地使这些部分静音并保留轨道上所有音频样本的相对位置：

1. 选择您需要静音的轨道部分。
2. 按Ctrl+L将该部分替换为静音。

仅此而已，在您静音的部分中，曲目将变得安静。这在具有大量背景噪音的录音中可能是一个问题。在这些情况下，沉默将非常明显。幸运的是，Audacity^{(Luckily Audacity)}有一个简洁的功能，可以让你减少背景噪音。这^(Which)也具有提高生产质量的可喜副作用！

快速去除背景噪音

背景^(Background)噪声消除仅适用于一致的噪声源。这些包括录音设备上的干扰嗡嗡声、空调的嘶嘶声和任何其他类似的噪音。 

用Audacity^(Audacity)删除它本身就是简单的：

1. 首先，选择音频中只有背景噪音的部分。为此目的，它总是记录几秒钟的背景噪音。
2. 现在，选择效果^{(Effect )}>降噪^{( Noise reduction)}。

1. 查找标有“获取噪声配置文件^{(Get noise profile)}”的按钮并选择它。
2. 现在，选择整个轨道。
3. 转到Effect>Noise reduction。
4. 将设置保留为默认设置，然后选择OK。

轨道现在应该有更少的（如果有的话）背景噪音。让聆听更愉快。

良好的理解

借助这些快捷方式和常用功能，您可以在Audacity中轻松分割音频，成为高效的声音编辑器。^(Audacity)您的播客会更紧凑，音质会更好，最终产品也会更好。

如果您想让音频工程火车继续运转，为什么不查看使用这些快速大胆的技巧让您的声音听起来很专业^{(Make Your Voice Sound Professional With These Quick Audacity Tips)}。

How to Split Audio in Audacity and Other Useful Tricks

Audacity is one of the best audio editing packages out there, which makes the fact that it’s also completely free something of a miracle. Used by professionals and hobbyists alike, Audacity is the software of choice for recording engineers, podcasters, audio restoration pros and anyone else who needs to work with audio data. 

It’s not that hard to use either, once you know where everything you need is located. The problem is that Audacity can be very unintuitive, making it hard to figure out how to perform common actions. Splitting audio is just one such function. In this article we’ll look at a few different ways to split audio in Audacity, as well as some important tricks that are worth knowing.

A Word on Keyboard Shortcuts

Just as with photo and video editing software, you’re better off learning the most important keyboard shortcuts instead of using the mouse. A lot of audio editing work involves doing dozens or even hundreds of repetitive actions and using the mouse for these can seriously slow down your work. As such we’ll be giving you both the mouse-menu steps and the keyboard shortcuts where applicable.

Splitting Audio Clips

Splitting a clip in Audacity means that you are separating a continuous sound file in two pieces. There are quite a few reasons to do this:

• Separating clips you want to keep from those you want to delete.
• Making space to insert new audio.
• Increasing or decreasing the spaces between segments.
• Processing audio one one particular segment of the track.
• Removing unwanted sounds.

The actual act of splitting an audio clip in Audacity is simple:

1. Move the pointer to the desired split point on the track and press the left mouse button.
2. Now, select Edit > Clip Boundaries > Split.

1. Alternatively, you can simply press Ctrl + I.

Now you can select the new clip sections independently. 

Joining Clips

What if you wanted to join clips together again? It’s basically the same process:

1. Select the audio you want to join. This has to be a continuous section of track.
2. If you want to fuse all clips on the timeline, use Ctrl + A to select everything.
3. Now, select Edit > Clip Boundaries > Join.

Now all of the clips will become one single piece of audio again.

Splitting a Stereo Track Into Mono Tracks

Most microphones record in mono, which is to say there’s only a single audio channel. However, stereo microphones or recorders using two separate microphones can create a single stereo track.

Let’s say that you recorded a podcast using two microphones and each speaker’s audio is now trapped in a single stereo track. By splitting it into two mono tracks you can edit each separately.

This option isn’t one you’ll find in the main menu structure of Audacity, instead you need to choose it from the track dropdown menu:

1. First, select the track dropdown menu for the track you want to split into mono tracks as shown here.
2. Now select “split stereo to mono tracks”.

You’ll see each channel become its own mono track.

From here on you can treat them as separate tracks with their own editing and effects.

Splitting Audio Tracks in Audacity With Labels

This is one for all of the folks who want to use Audacity as a way to record and preserve older media such as vinyl or cassette tapes. These media are recorded as one long piece of audio, but you probably want to split it into tracks.

Instead of tediously splitting and exporting sections of this mega recording, you can simply label the start of each track and then automatically export each labeled track as its own file. Assuming that you have already cleaned up and restored the audio to your liking, here’s how to split it into exported tracks using labels:

1. Select the Skip to Start button to the right of the Stop button.

1. Select Edit > Labels > Add Label at selection then give the first track its name.

1. Now using the selection tool, select the position of the next clip’s beginning.
2. Again, repeat the above labeling process. Do this for every desired track or clip.

1. You can use Ctrl + B to place labels.
2. Now, select File > Export Multiple or press Ctrl + Shift + L
3. Choose a format and location for the export.
4. Next, choose Split Files Based On Labels.
5. In the Name Files section, select “Using Labels”.

1. Select Export.

Now each labeled section will be saved as a separate file. You’ll be prompted to add metadata for each one in sequence, simply select OK (not “Save”) when done with each track’s details.

Remove Ums and Aahs With a Silence

One of the most important (and most tedious) jobs when prepping a recording is the removal of unwanted noises. This is especially true if it’s a voice recording, such as for podcasts or instructional videos.

When we speak there can be many artifacts that end up on the recording. Verbal tics such as ums and ahs are very common when someone isn’t reading from a script. These can be distracting to the listener and reduce the production quality of your recording. You’ll also want to remove excessive breathing noises, lip smacking, swallowing and other human sounds that most people probably don’t want beamed directly into their ears via headphones.

While you can simply select that section and delete it, this also deletes the time that audio occupied on your track! Which means you shorten the track and remove the space between the parts of the audio you want to keep. That’s something you may want to do, but if not you can simply silence those sections instead and preserve the relative positions of all the audio samples on the track:

1. Select the section of the track you need to silence.
2. Press Ctrl+L to replace that section with silence.

That’s all there is to it, the track will go quiet in the sections you silence. This can be a problem in recordings with lots of background noise. The silences will be very obvious in those cases. Luckily Audacity has a neat function that lets you reduce background noise. Which also has the welcome side effect of elevating your production quality!

Quickly Remove Background Noise

Background noise removal only really applies to consistent sources of noise. These include the hum of interference on the recording equipment, the hiss of an air conditioner and any other similar noise. 

Removing it with Audacity is simplicity itself:

1. First, select a section of your audio that only has background noise. It’s always word recording a few seconds of background noise for this purpose.
2. Now, select Effect > Noise reduction.

1. Look for a button labeled “Get noise profile” and select it.
2. Now, select the entire track.
3. Go to Effect>Noise reduction.
4. Leave the settings at their default and then select OK.

The track should now have much less (if any) background noise. Making it more pleasant to listen to.

A Sound Understanding

With these shortcuts and common functions to split audio in Audacity under the belt you’re well on your way to becoming an efficient sound editor. Your podcasts will be tighter, your sound quality better and the final product better for it.

If you want to keep the audio engineering train rolling, why not check out Make Your Voice Sound Professional With These Quick Audacity Tips.

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