audioDeviceIOCallbackInt - input is always silent

MacOSX and iOS
1

Hello,
I am on macbook pro with Apple Silicon M1.

I initialised everything as follows:

String devInfo = deviceManager.initialise(1, 0, nullptr, true);
deviceManager.addAudioCallback(myAudioIODeviceCallback);

And in audioDeviceAboutToStart() defined in my myAudioIODeviceCallback I set:

void audioDeviceAboutToStart(juce::AudioIODevice* device)
{
        DBG("Current input device: " << device->getName());
        DBG("Number of input channels: " << device->getInputChannelNames().size());
        
        DBG("is opened: " + String(device->isOpen() ? "YES" : "NO"));
        DBG("is playing: " + String(device->isPlaying() ? "YES" : "NO"));
        DBG("active channels: " + String(device->getActiveInputChannels().toInt64()));
}

And I get here in console printed:

Current input device: MacBook Pro Microphone
Number of input channels: 1
is opened: YES
is playing: YES
active channels: 1

And I checked in my “MacOs → System Settings → Sound → Input” and there is input volume set to maximum and on the meter I see there is signal.

But in my audioDeviceIOCallbackWithContext input has all values equal zero.

Please help. What is going wrong here?

For any help great thanks in advance.

2

You need to handle the audio input device permissions.

3

Thanks @xenakios for your answer.
I’ve heard about that. But I have no idea how to do that.

There is juce::RuntimePermissions but in documentation there is said that it works only for Android.
So juce::RuntimePermissions::request() and other methods do nothing. And juce::RuntimePermissions::isGranted() always return true;

4

I am not familiar with this. But the following four lines works for my standalone which wants microphone input:

juce_add_plugin(// something here
        MICROPHONE_PERMISSION_ENABLED TRUE
        MICROPHONE_PERMISSION_TEXT "something here"
        HARDENED_RUNTIME_ENABLED TRUE
        HARDENED_RUNTIME_OPTIONS com.apple.security.device.audio-input)
5

Thanks, but I can’t find juce_add_plugin() anywhere. Even in JUCE documenntation

6

That would be a thing to add in your Cmake CmakeLists.txt file, not in your C++ code. If you are not using Cmake, there is an option in the Projucer too :

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1 Like
7

Woooooow… !!! @xenakios THANKS THANKS THANKS!

I spent on it today about 4 hours. :joy:

8

I have a similar issue to the OP, I have added the above parameters to my CMakeLists.txt, but I still get no audio input if I build a universal binary. If I delete the arm64 target then my x86 binary works perfectly (on my Intel Mac), but as soon as I specify “arm64;x86_64” I get no audio at all.
Using projucer is not an option for me, as it can’t create a cmake file.
I don’t think the problem is related to enabling the microphone, as it is definitely enabled already. Are there any more cmake settings that matter for audio input?