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Knut
0

Microphone giving only zero-samples for 2019b on macOS 10.14 Mojave

Asked by Knut
on 30 Oct 2019
Latest activity Commented on by Atli Örn Friðmarsson on 5 Nov 2019
What I did:
recObj = audiorecorder;
recordblocking(recObj, 5);
y = getaudiodata(recObj);
While talking out loud.
Expected for y to contain audio data.
Observed that y contains only 0-samples:
unique(y)
ans =
0
Apple have introduced microphone (and webcam) privacy in macOS 10.14. It seems that applications have to "opt-in" in order for the user to get a pop-up asking for permission to use these devices. Is it possible that Mathworks forgot to do this?
Opening '/Applications/MATLAB_R2019b.app/Contents/Info.plist', I see no references to '«Information Property List -> Privacy - Microphone Usage Description»'. Given that, I see no possibility that microphone can be usable on macOS 10.14 for MATLAB 2019b?

  2 Comments

Work-around:
1) Start MATLAB from terminal:
cd Applications/MATLAB_2019b.app/bin
./matlab
2) Attempt to access the microphone using the script above.
3) Get a popup asking if terminal should have access to the microphone
4) Answer "yes"
5) Observe that MATLAB now gets non-0 microphone samples
In step nr. 2) - How do you access the microphone?

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R2019b

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