Errors with audiorecord function

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Nikos Korobos 2022-3-18

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评论： Nikos Korobos 2022-3-22

采纳的回答： Walter Roberson

Hello everyone, I've written the below code so far.

Need Matlab to record(function to be running/active) for as long the button is pressed.

Then use the above running time as an input for the record function (screenshot).

Imagine it being like a play/pause button.

Gives me some errors

Can I use while (as long the state button value is True) instead of if(skips some code parts)?

Thanks in advance

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Nikos Korobos 2022-3-18

Is it possible to replace the if with a while?

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Walter Roberson 2022-3-18

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Yes, it is possible. However, you cannot achieve your goals by doing that.

You are in the middle of a callback that fires every time the state of the button changes -- which can mean that it was pressed to start or can mean that it was pressed to end.

You should have your app store the current status, currently recording or not. You should have your app store the recorder object (at the app level).

When the button is pushed, have the value changed function check to see if it is a request to start recording or to stop recording.

If it is a request to start recording and you are already recording, either discard the press or else stop the existing recording and continue on as if you were not already recording.
If it is a request to start recording and you are not already recording (or you "fell through" after stopping an existing recording), create the recorder object and store it at the app level, and set your state to "recording", activate the record() method of the recorder, and return from the callback.
If it is a request to stop recording and you are not already recording, discard the press
If it is a request to stop recording and you are currently recording, stop the recording, grab the data, remove the recorder object, set your state to not-recording, and enable any actions that should not be possible to perform until you have recorded data, and return

When you activate the record() method, I recommend that you put in a maximum length, to prevent it from overflowing the memory.