具有讽刺意味的是,Apple 标志性的 iTunes 软件现在只能在Windows上使用。在 macOS 和 iOS 上,该应用程序已被几个应用程序所取代,每个应用程序都可以完成专门的工作并且做得很好。然而, Windows(Windows)用户有时会遇到 iTunes 无法播放音乐的问题。
这可能是因为 iTunes 没有像过去作为Apple武器库中的主要应用程序那样得到Apple开发人员的黄金时段关注。或者可能只是因为它是 iTunes。无论哪种方式,您都可以尝试采取一些措施让微软(Microsoft)和苹果(Apple)的公司重新发挥良好的作用。

1. 检查你的音频输出
在开始对音频设置进行故障排除之前,请确保您的音频硬件设置正确。您的扬声器或耳机是否已插入?他们有权力吗?所有的音量滑块都在正确的水平吗?追踪(Trace)链条以确保一切就绪。如果一切正常,就该查看音频软件设置了。 
可能是 iTunes 正在正常播放音乐,但将音频发送到错误的设备。这可能是由您的计算机本身或 iTunes 引起的。
要检查您的通用声音输出目标:
- 左键单击(Left-click)通知区域中的扬声器图标。
- 选择音量滑块右侧的向右箭头。

- 如果不正确,请选择正确的输出设备。

如果输出设备正确,我们将检查 iTunes 是否设置为所需的输出:
- 右键单击(Right-click)通知区域中的扬声器图标。
- 选择打开音量混合器。

- 在列表中查找 iTunes(它必须正在运行)并选择其下拉箭头。

- 在 iTunes 下的展开菜单中,打开输出下拉菜单。

- 确保(Make)iTunes 设置为将音频发送到正确的设备或输出。
顺便说一句,这是将 iTunes 音乐发送到蓝牙(Bluetooth)扬声器的好方法,同时仍可通过计算机扬声器接收其他 PC 音频,
2. 检查 iTunes播放(Playback)首选项
还有一种播放设置可能会导致 iTunes 出现问题,您可以在 iTunes > Edit > Preferences > Playback > Play Audio Using下找到它。

只有两个选择;Windows 音频会话(Windows Audio Session)或直接声音(Direct Sound)。无论(Whichever)当前选择哪个,请尝试替代方案以查看是否有帮助。如果没有,请在继续之前更改设置。
3.更新并重启你的电脑
如果音频源看起来正确,请转到Windows 更新(Windows Updates)并检查是否有可用的新更新。如果有,请继续安装它们。
下一个合乎逻辑的步骤是重置您的Windows PC,以防(Windows)Windows、音频驱动程序或 iTunes出现暂时性问题。无论如何,在Windows(Windows)更新后重新启动计算机是个好主意,因此无论是否有更新,都要重新启动系统。重新启动后,尝试再次播放音乐。
4. 检查 iTunes 更新
您的播放问题可能是由 iTunes 中的一个已知错误引起的,Apple已在更新中修复了该错误。由于 iTunes 是使用Windows Store安装的,因此请在店面中搜索它并查看是否有更新可用。
如果您没有从Windows 应用商店(Windows Store)安装 iTunes ,请转到iTunes 下载页面(iTunes download page),获取最新版本的 iTunes,然后进行安装。
5. 检查音频驱动程序更新
虽然Windows通常可以很好地使您的硬件驱动程序保持最新状态,但它可能落后于最新版本。因此,请访问您的声卡制造商的网站并检查是否有更新版本的驱动程序可用,然后手动安装。
6. 您的 Windows PC 是否已授权?
Apple只允许有限数量的计算机播放您购买的 iTunes 内容。您一次最多可以拥有五台授权计算机。如果您已重新安装Windows或购买了新计算机,并且已达到限制,则需要取消对这些计算机的授权。
要检查您当前授权了多少台计算机:
- 打开 iTunes。
- 转到帐户 > 查看我的帐户。
- 登录您的 Apple 帐户。
- 在Computer Authorizations(Computer Authorizations)旁边,检查有多少台计算机获得授权。

如果您已经授权了五台计算机,让我们检查您当前的计算机是否是其中之一:
- 打开 iTunes。
- Select Account > Authorizations > Authorize这台计算机”。
系统会要求您输入您的Apple ID电子邮件和密码,然后选择Authorize。如果您收到已达到最大授权数的错误消息:
- 打开 iTunes。
- 转到帐户 > 查看我的帐户。
- 登录您的 Apple 帐户。
- 在Computer Authorizations(Computer Authorizations)旁边,选择Deauthorize all。
- 输入(Enter)您的Apple帐户凭据并确认。
7. 检查防火墙设置

要流式传输或同步音乐,iTunes 需要访问互联网。如果您的 Windows 或其他网络防火墙阻止 iTunes 访问互联网,它的某些功能可能无法使用。您可能必须在防火墙或路由器上打开某些网络端口才能正常工作。请查阅Apple 的网络端口列表(Apple’s list of network ports)以查看 iTunes 需要哪些端口,然后阅读我们的端口转发指南(port forwarding guide),或查阅您的防火墙或路由器的文档。
8. iTunes 正在跳过共享库(Shared Library)中的歌曲
如果您有一个由不同Apple ID(Apple IDs)购买的共享音乐库,如果您的电脑未获得播放该歌曲的授权,iTunes 将跳过该歌曲。 
双击(Double-click)任何被跳过的歌曲,系统会提示您输入购买该音乐的Apple ID的电子邮件和密码。(Apple ID)这将授权您的计算机播放属于该Apple ID的所有音乐,前提是尚未达到该Apple ID的最大授权数。
9. 你正在播放不支持的音频格式(Audio Format)

通常,iTunes 会将您导入的任何音乐文件转换成它喜欢的格式,但在某些情况下,歌曲的扩展名不正确或使用的格式版本无法在 iTunes 中正常播放。最好使用一个好的音频转换器(audio converter)来确保文件是 iTunes 可以使用的标准格式。
您还应该仔细检查以确保文件具有正确的文件扩展名。例如,如果一个AAC文件实际上是一个MP3文件,它就不起作用。如果即使转换软件也无法读取文件,则文件可能具有不正确的扩展名或已损坏。您可以尝试其他常见的扩展,看看是否可行,但简单地找到正确的音乐格式会更容易。
10. 重建 iTunes 资料库
您的 iTunes音乐库(Music Library)可能以某种方式损坏,这可能会导致它跳过歌曲,或在当前曲目中途跳到另一首歌曲。您可以重建您的图书馆(rebuild your library),尽管它需要几个步骤,并且如果可能的话,还需要一个外部或辅助硬盘驱动器。
11. 重新下载并重新安装(Reinstall)iTunes。
如果您尝试的任何方法都不起作用,那么是时候卸载 iTunes,然后重新安装它了。在执行此操作之前,您可能希望在备份后导出 iTunes 资料库。因此,如有必要,您可以在重新安装应用程序后恢复它。
12. 使用Apple Music 网络媒体播放器(Apple Music Web Media Player)

如果您尝试使用 iTunes 音乐应用程序播放您订阅的Apple Music中的音乐,您可以前往 apple.music.com 并改用基于网络的播放器。您所要做的就是登录,一切顺利
。(All)
不幸的是,这不能让您访问直接从 iTunes 商店购买的音乐。至少在撰写本文时,我们无法在网站上看到我们购买的音乐。我们只能看到Apple Music的歌曲,无法从 iCloud 中看到任何内容。但当您阅读本文时,这可能已经改变,因此值得登录查看。
13.联系(Apple Support)Apple(Touch)支持
如果您在上面尝试过的任何方法似乎都不适合您,那么您可能最不想尝试的就是直接与Apple 支持(Apple Support)联系,看看他们是否有任何具体建议。
可能问题实际上出在苹果方面,在这种情况下,除了等待他们解决问题外,您无能为力。您还可以访问Apple 系统状态网站(Apple System Status website),检查是否有任何报告的问题可能与您的播放问题有关。即使您可以在 iPod、iPhone 或 iPad 上播放音乐,但将音乐发送到Windows机器可能会遇到Apple需要解决的特定问题。
您也可以尝试Apple 官方支持社区(Official Apple Support Community),其他像您一样的用户会在这里互相帮助。搜索(Search)帖子数据库,看看是否还有其他人遇到同样的问题。
     
    
        13 Things to Try When iTunes Won’t Play Music
        Ironically, Apple’s iconic iTυnes software iѕ now only available on Windows. On macOЅ and iOS, the application has been replaced by several apps that each do a specialіzed job and do it well. Wіndows users, however, sometimes face an issue where iTunes won’t play mυsic.
This might be because iTunes doesn’t get the primetime attention from Apple developers that it used to when it was the main app in Apple’s arsenal. Or it could be simply because it’s iTunes. Either way, there are a few things you can try to get the houses of Microsoft and Apple to play nice again.

1. Check Your Audio Output
Before you start troubleshooting audio settings, make sure that your audio hardware is set up correctly. Are your speakers or headphones plugged in? Do they have power? Are all the volume sliders at the right level? Trace through the chain to make sure everything is in place. If it all looks right, it’s time to look at audio software settings. 
It may be that iTunes is playing the music just fine, but sending the audio to the wrong device. This could be caused by your computer itself or by iTunes.
To check your universal sound output target:
- Left-click on the speaker icon in the notification area.
- Select the right-facing arrow on the right-hand side of the volume slider.

- Choose the correct output device if it’s not correct.

If the output device is correct, we’ll check whether iTunes is set to the desired output:
- Right-click on the speaker icon in the notification area.
- Select Open Volume Mixer.

- Look for iTunes (it has to be running) in the list and select its dropdown arrow.

- In the expanded menu under iTunes, open the dropdown menu for output.

- Make sure that iTunes is set to send audio to the correct device or output.
Incidentally, this is a great way to send your iTunes music to, for example, a Bluetooth speaker while still getting other PC audio through your computer speakers,
2. Check iTunes Playback Preferences
There’s one more playback setting that may be causing issues for iTunes, and you’ll find it under iTunes > Edit > Preferences > Playback > Play Audio Using.

There are only two options; Windows Audio Session or Direct Sound. Whichever is currently selected, try the alternative to see if it helps. If it doesn’t, change the setting back before proceeding.
3. Update and Reboot Your PC
If the audio sources look correct, head over to Windows Updates and check if there are any new updates available. If there are, go ahead and install them.
The next logical step is to reset your Windows PC in case there’s a transient issue with Windows, the audio driver, or iTunes. It’s a good idea to reboot your computer after a Windows update anyway, so reboot the system whether there was an update or not. After rebooting, try to play your music again.
4. Check for iTunes Updates
Your playback issues may result from a known bug in iTunes that Apple has since fixed in an update. Since iTunes is installed using the Windows Store, search for it in the storefront and see whether an update is available.
If you did not install iTunes from the Windows Store, go to the iTunes download page, grab the latest version of iTunes, and install it.
5. Check For Audio Driver Updates
While Windows generally does a good job of keeping your hardware drivers up to date, it may lag behind the latest version. So visit your sound card manufacturer’s website and check if there’s a newer version of the driver available, then install it manually.
6. Is Your Windows PC Authorized?
Apple only allows a limited number of computers to play the iTunes content you’ve bought. You can have up to five authorized computers at any one time. If you’ve reinstalled Windows, or have bought a new computer, you need to deauthorize those computers if you’re at your limit.
To check how many computers you currently have authorized:
- Open iTunes.
- Go to Account > View My Account.
- Sign into your Apple account.
- Next to Computer Authorizations, check how many computers are authorized.

If you already have five computers authorized, let’s check if your current computer is one of them:
- Open iTunes.
- Select Account > Authorizations > Authorize this computer.
You’ll be asked to enter your Apple ID email and password, then choose Authorize. If you get an error that you’ve reached the maximum number of authorizations:
- Open iTunes.
-  Go to Account > View My Account.
- Sign into your Apple account.
- Next to Computer Authorizations, select Deauthorize all.
- Enter your Apple account credentials and confirm.
7. Check Firewall Settings

To stream or sync music, iTunes needs access to the internet. If your Windows or other network firewall is blocking iTunes from reaching the internet, some of its features may not work. You may have to open up certain network ports on the firewall or on your router to get things working. Consult Apple’s list of network ports to see which ones iTunes requires, then read our port forwarding guide, or consult the documentation for your firewall or router.
8. iTunes Is Skipping Shared Library Songs
If you have a shared library of music purchased by different Apple IDs, iTunes will skip over that song if your computer is not authorized to play it. 
Double-click any songs being skipped over, and you should be prompted to enter the email and password for the Apple ID that purchased that music. This will authorize your computer to play all music belonging to that Apple ID, assuming that the maximum number of authorizations has not been reached for that Apple ID.
9. You’re Playing An Unsupported Audio Format

In general, iTunes will convert any music files you import into a format it prefers, but in some cases, songs have the incorrect extension or use a version of the format that doesn’t play well with iTunes. It’s best to use a good audio converter to ensure that files are in a standard format that iTunes can use.
You should also double-check to ensure that files have the correct file extension. For example, if an AAC file is actually an MP3 file, it won’t work. If even the conversion software can’t read the file, the file may have an incorrect extension or it’s corrupt. You can try other common extensions to see if that will work, but it’s easier to simply find a correct format of the music.
10. Rebuild the iTunes Library
Your iTunes Music Library may be broken in some way, which can cause it to skip songs, or skip to another song halfway through the current track. You can rebuild your library, although it requires several steps and if at all possible, an external or secondary hard drive.
11. Re-download and Reinstall iTunes.
If nothing you try works, it’s time to uninstall iTunes and then reinstall it. Before you do so, you may want to export your iTunes library after making a backup of it. So if necessary, you can restore it after reinstalling the application.
12. Use the Apple Music Web Media Player

If you’re trying to use the iTunes music app to play music from your Apple Music subscription, you can go to apple.music.com and use the web-based player instead. All you have to do is log in, and you’re good to go.
Unfortunately, this doesn’t give you access to music that you’ve bought outright from the iTunes store. At least we couldn’t see our purchased music on the site at the time of writing. Only Apple Music songs were visible to us, with nothing from iCloud. But this may have changed by the time you read this, so it’s worth logging in to check.
13. Get in Touch With Apple Support
If nothing you’ve tried above seems to work for you, the last thing you may want to try is getting in touch with Apple Support directly to see if they have any specific advice.
It may be that the problem is actually on Apple’s side of the equation, in which case, there’s not much you can do about it except wait for them to fix the issue. You can also go to the Apple System Status website to check if any reported issues may be related to your playback issue. Even if you can play music on your iPod, iPhone or iPad, there may be a specific problem with sending music to Windows machines that Apple needs to address.
You can also try the Official Apple Support Community, where other users like yourself try to help each other out. Search through the postings database to see if anyone else has the same problem.