How to set timer to execute a function

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 :)

Answer 1

[Geoff Hayes]

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!

[BeestMann]

   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]

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.