在iOS中通过蓝牙播放时从内置麦克风录制 [英] Recording from Built-In Mic when Playing through Bluetooth in iOS

问题描述

是否可以从iPhone的内置麦克风接收音频输入，同时通过蓝牙耳机播放音频？

Is it possible to receive audio input from iPhone's built-in microphone, and play that audio through a Bluetooth headset, at the same time?

我的目标是即使输出设备是耳机，也总是使用内置麦克风作为输入设备，因为内置麦克风在我的使用情况下更方便。

My goal is to always use the built-in microphone as the input device, even if the output device is a headset, because the built-in microphone is more convenient in my use cases.

当输出设备是有线耳机时，我知道如何实现我的目标，就像与iPhone捆绑的耳机一样。我只需插入有线耳机，然后调用以下方法：

I know how to achieve my goal when the output device is a wired headset, like the one that comes bundled with an iPhone. I simply plug the wired headset in, and call the following method:

- (void)selectBuiltInMicrophone
{
    AVAudioSession *session = [AVAudioSession sharedInstance];
    for (AVAudioSessionPortDescription *port in session.availableInputs)
        if ([port.portType isEqualToString:AVAudioSessionPortBuiltInMic]) {
            NSError *error;
            [session setPreferredInput:port error:&error];
            break;
        }
}

通过调用上述方法，输入设备将是从有线耳机的麦克风切换到iPhone的内置麦克风，而输出设备不受影响，因此iPhone将从内置麦克风录制并通过有线耳机播放。这就是我的期望。

By calling the above method, the input device will be switched from the wired headset's microphone to iPhone's built-in microphone, while the output device remains unaffected, so the iPhone will record from the built-in microphone and play through the wired headset. This is what I expect.

问题是，当耳机是蓝牙耳机时，此方法不起作用。如果我将蓝牙耳机连接到iPhone，然后调用上面的方法，内置麦克风将成为输入设备，这很棒，但输出设备也将更改为iPhone的接收器，这是不好的。

The problem is, this method does not work when the headset is a Bluetooth one. If I connect a Bluetooth headset to the iPhone, then call the above method, the built-in microphone will becomes the input device, which is great, but the output device will also be changed to iPhone's receiver, which is bad.

似乎蓝牙耳机的输入和输出被锁定在一起：您要么同时使用它们，要么不使用它们。我的目标真的不可能吗？或者有一种方法可以克服明显的限制？

It seems that the input and the output of a Bluetooth headset are locked together: you either use both of them, or you use none of them. Is my goal really impossible? Or there exists a way to overcome the apparent limitation?

推荐答案

无法从iPhone内置接收音频输入-in麦克风，同时通过蓝牙耳机播放音频

1. 您可以预防像 walkie-talkie 一样使用。


2. 你必须创建两个会话。意味着在录制音频时你必须启用带有记录和播放的音频会话。


3. 播放时你必须将选项设置为音频（允许蓝牙）。


4. 虽然录制您必须设置记录和播放。

1. There is a prevention that you can use like a walkie-talkie .
2. you have to create Two sessions . Means while recording audio you have to enable audio session with recordandplay.
3. while Playing you have to set the option to audiosession (allowingBluetooth) .
4. While Recording You have to set recordandplay.

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