How to set timer to execute a function

2016 3 3
1 个回答
更新时间：2016 3 15
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Okay so this is what I'm trying to do. I'll put whatever I'm struggling with in parenthesis.
  • MATLAB loads pre-recorded WAVE file (I can use Audioread but I need more help with that)
  • MATLAB reads that pre-recorded WAVE file (Once, again, how?)
  • If time is more than 60 seconds from initial, play WAVE file (how do I set this time thing)
  • else if time is less than 60 seconds, do nothing (how do I set this time thing)
Thanks guys :)

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回答（1 个）

Geoff Hayes
Geoff Hayes 2016-3-15

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Beestmann - audioread can be used to read the audio data from file as
filename = 'myAudioFile.wav';
[y,Fs] = audioread(filename);
Now, you can use the audio player to load (and later play) the audio as
player = audioplayer(y,Fs);
We want to play the audio with a fixed delay, so we create a function that our timer will call
function playAudio(hObject, eventdata, audioPlayer)
play(audioPlayer);
We can ignore the first two input parameters as they are only there because we are going to call this function from a timer (which will populate them with the handle to the timer and perhaps some event data (which is typically empty)).
Now we create a (one-off) timer to play the audio file in sixty seconds as
audioFilename = 'myAudioFile.wav';
[y,Fs] = audioread(filename);
player = audioplayer(y,Fs);
hTimer = timer('Name','MyAudioTimer', ...
'StartDelay', 60, ...
'TimerFcn',{@playAudio, player});
start(hTimer);
Try the above and see what happens!

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BeestMann
BeestMann 2016-3-15
编辑：BeestMann 2016-3-15
function BRUHHH = playAudio(hObject, eventdata, audioPlayer)
play(audioPlayer);
Filename = 'imperial_march.wav';
[y,Fs] = audioread(Filename);
player = audioplayer(y,Fs);
hTimer = timer('imperial_march.wav','MyAudioTimer', ...
'StartDelay', 60, ...
'TimerFcn',{@playAudio, player});
start(hTimer);
end
So this is what I put on the function tab. I saved it as "BRUHHH.m" - what did I do wrong? MATLAB is saying that there aren't enough input arguments on lines 2 and I can't figure out what to put in 'Name'
Also, there are too many input arguments for the audioread part? What's wrong with that? Thanks :)
Geoff Hayes
Geoff Hayes 2016-3-15
You've combined playAudio function with the code that creates the timer. They are separate. The playAudio function just calls play on the audioPlayer object. The other code,
audioFilename = 'myAudioFile.wav';
[y,Fs] = audioread(filename);
player = audioplayer(y,Fs);
hTimer = timer('Name','MyAudioTimer', ...
'StartDelay', 60, ...
'TimerFcn',{@playAudio, player});
start(hTimer);
occurs outside of this function.
Also, the property of the timer is Name so you can't change it to the name of the wav file. Look to the documentation.

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