Change CurrentSample in audioplayer

I want to be able to allow a user to select a point in a track and begin playing, so I have a ButtonDownFcn set on an axes to take the coordinates clicked and convert this to a sample number to resume playing a plotted audio clip.

% Get the x coordinate
c = get(hObject, 'CurrentPoint');
x = c(1,1);

% Multiply this by the sample rate (x axis represents seconds) 
% to get the sample at which the track should resume
smpl = x * get(player, 'SampleRate');
set(player, 'CurrentSample', smpl);

The issue I'm having is that I then get an error message that says Error using audioplayer/set You cannot set the read-only property 'CurrentSample' of audioplayer.

So obviously this isn't the correct way to skip to a new point in a track. What is the correct way to do this?

Answer 1

[Walter Roberson]

The correct way is to delete the audioplayer and create a new one whose samples start with the appropriate sample.

Alternately, you can use https://www.mathworks.com/help/dsp/ref/audiodevicewriter-class.html or https://www.mathworks.com/help/dsp/ref/audiodevicewriter-class.html

[Ryan Sinfield]

Ok - is there a way to get the audio data from the audioplayer object. Similar to using getaudiodata() from an audiorecorder?

[Walter Roberson]

player_struct = struct(YourAudioPlayerObject);
player_struct.AudioData

Though I just realized another way:

You can

   stop(YourAudioPlayerObject)
   play(YourAUdioPlayerObject, NewStartingSampleNumber)

[Ryan Sinfield]

Cool I'll give that a try a little later on. Thanks!

[Ryan Sinfield]

That works great, thanks

[Walter Roberson]

Updated documentation links:

https://www.mathworks.com/help/dsp/ref/audiodevicewriter.html

https://www.mathworks.com/help/audio/ref/audiodevicewriter.html