blocks|key|2662565|text|我已经设法解决了这个问题，实际上它似乎是麦克风的问题。进入系统偏好设置->声音，选择输入选项卡，并将内置麦克风设置为输入(我的麦克风设置为我的耳机)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2662566|​|2662567|📷|atomic|offset|length|2662568|2662569|糟糕的声音在那之后就会消失=)|2662570|编辑(2018年5月30日)：|2662571|我已经找到了一种更简单的方法来做同样的事情。您可以直接进入Mac+OSX工具栏，按住Option+(alt)并单击声音图标，然后从“输入设备”列表中选择“内置麦克风”，而不是打开系统首选项。打印屏幕如下所示。|2662572|2662573|2662574|2662575|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/dee3f7f16cec1860ae4c1901d1a7fbda.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/0938faed8f3a4a68fd638f9c8e3d2307.png^0|0|0|0|1|0|0|0|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|15|8|@]|9|@$G|16|H|17|1|18]]|A|$]]|$1|I|3|C|5|6|7|19|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1A|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1B|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1C|8|@]|9|@]|A|$]]|$1|P|3|C|5|6|7|1D|8|@]|9|@]|A|$]]|$1|Q|3|E|5|F|7|1E|8|@]|9|@$G|1F|H|1G|1|1H]]|A|$]]|$1|R|3|C|5|6|7|1I|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z|10|-4]]|11|$5|V|W|X|A|$Y|12|10|-4]]]]

I've managed to fix it, and it actually seems to be a microphone issue. Go to System Preferences -> Sound, select the Input tab and set Internal Microphone as the input (mine was set with my headphones').

<a href="https://i.stack.imgur.com/EeZoo.png" rel="noreferrer"><img src="https://i.stack.imgur.com/EeZoo.png" alt="system preferences print screen"></a>

Crappy sound goes way after that =)

<h2>EDIT (May 30 2018):</h2>

I've found out an easier way to do the same as above. Instead of opening the System Preferences, you can just go to the Mac OSX toolbar, press Option (alt) + click on the sound icon and then select "Internal Microphone" from the "Input Device" list. Print screen as follows.

<a href="https://i.stack.imgur.com/D7tAw.png" rel="noreferrer"><img src="https://i.stack.imgur.com/D7tAw.png" alt="input selection from toolbar"></a>

blocks|key|113347|text|如果您使用的是Xcode+9或更高版本，则可以为模拟器设置默认的音频输入和输出。这可以通过从Xcode启动模拟器并导航到菜单栏中的I/O+>+Audio+Input并选择Internal+Microphone来完成。此解决方案将保存您的音频首选项，因此您不必在每次启动时更改它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|113348|​|113349|📷|atomic|113350|113351|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/5fcc709e7799dd648f4023f46bba6c81.png|imageAlt^0|1T|3|1Z|B|2D|J|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|K|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S|T|-4]]]]

If you're using Xcode 9 or higher, you can set a default audio input and output for the simulator. This can be done by launching the simulator from Xcode and navigating to <code>I/O</code> > <code>Audio Input</code> within the menu bar and selecting <code>Internal Microphone</code>. This solution will save your audio preference so you won't have to change it on every launch.

<a href="https://i.stack.imgur.com/w4LlW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/w4LlW.png" alt="Audio Input Setting"></a>

blocks|key|115789|text|在Simulator上，选择；|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|115790|I/O+->+Audio+Input+->+Macbook+[Pro]|BOLD|115791|好了。|115792|​|115793|📷|atomic|115794|115795|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/404c33b72186a931915ef8fb8e5b0ce5.png|imageAlt^0|1|9|0|0|Z|0|Z|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|12|8|@$9|13|A|14|B|H]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|I|3|J|5|6|7|17|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|18|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|19|8|@]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|P|3|L|5|6|7|1D|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X|Y|-4]]]]

On <code>Simulator</code>, Select;

<code>I/O -&gt; Audio Input -&gt; Macbook [Pro]</code>

Done.

<a href="https://i.stack.imgur.com/60HYz.png" rel="noreferrer"><img src="https://i.stack.imgur.com/60HYz.png" alt="Simulator Audio Input"></a>

blocks|key|115801|text|似乎多年的痛苦终于结束了，Xcode+12+Beta+Release+Notes|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|115802|除非您明确选择不同的音频源，否则|115803|模拟器默认使用内置麦克风。这可避免在蓝牙耳机上触发电话呼叫模式，从而在收听音乐时降低音频质量。(59338925,59803381)|blockquote|115804|115805|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/documentation/xcode-release-notes/xcode-12-beta-release-notes^0|D|R|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|W|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]]]

Seems like years of suffering are finally over, <a href="https://developer.apple.com/documentation/xcode-release-notes/xcode-12-beta-release-notes" rel="noreferrer">Xcode 12 Beta Release Notes</a>:
<blockquote>
Simulator defaults to the internal microphone unless you explicitly choose a different audio source. This avoids triggering phone call mode on Bluetooth headsets which degrades audio quality while listening to music. (59338925, 59803381)
</blockquote>

blocks|key|2662731|text|​|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2662732|📷|atomic|offset|length|2662733|你也可以切换到Mac的内置麦克风在系统偏好设置->声音，这是我通常如何修复这个错误(我有索尼Wh-1000XM3)|2662734|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/d33619ce895e52db6bebeb4e509f52cb.png|imageAlt^0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@$E|T|F|U|1|V]]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P|Q|-4]]]]

<a href="https://i.stack.imgur.com/YUkBh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YUkBh.png" alt="enter image description here" /></a>You can also switch to Mac's internal mic in System Preferences -&gt; Sound, that's how I usually fix this bug (I have Sony Wh-1000XM3)

The situation goes a little something like this:

<ol>
<li>I am programming Xcode whilst concurrently listening to music on my Bluetooth headphones... you know to block out the world.</li>
<li>Then, I go to launch my app in the iOS simulator and BOOM all of a sudden my crystal clear music becomes garbled and super low quality like it is playing in a bathtub 2 blocks away... in the 1940s. </li>
<li>Note: the quality deterioration does NOT occur if I am playing music on my laptop or cinema display and I launch the sim. It seems to be exclusively a Sim -> Bluetooth issue. </li>
</ol>

The problem is more than just annoying. Because often after stopping the simulator the crappy bathtub quality music continues. To fix it I have to open sound preferences in OSX and briefly toggle back to my laptop sound and then back to my Bluetooth headphones. 

This is a big deal because I launch the simulator 50x a day and have to do this toggle thing every time as well as suffer listening to 40s era mono ham radio quality music. 

For your information, the headphones I am using are Plantronics BackBeat Pro and I am up to date on firmware. I am on OSX 10.11.4 and Xcode 7.3... but this problem has persisted through all versions for 2+ years now. Can you save me from the 1940s?

Bluetooth headphone music quality deteriorates when launching iOS simulator

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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情况有点像这样：我正在编写Xcode，同时在蓝牙耳机上听音乐……然后，我在iOS模拟器中启动我的应用程序，突然，我晶莹剔透的音乐变得乱七八糟，音质极低，就像在两个街区外的浴缸里播放一样……在1940年代。注:如果我在笔记本电脑或影院显示器上播放音乐，并启动SIM卡，则不会出现质量下降。这似乎只是一个模拟->蓝牙的问题。这个问题不仅仅是恼人的。因为通常在停止模拟器后，糟糕的浴缸音质音乐会继续播放。供

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