How can i do the real time sound volume change in GUI?

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A = get(handles.Volume_Slider,'Value');
TempSound = TempFft;
RestoredAudio = real(ifft(TempSound));
sound(A*RestoredAudio,fs/2)   
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I used slider Bar in Gui

If i want to change the volumn of sound, then I have to press play button again after chaning slider bar

How can I change in real time?

I want to change the volumn by just moving of slider bar

Like this equalizer

Answer 1

[Walter Roberson]

1) Use audioplayer:

Divide the sound up into chunks. For each chunk, multiply the contents of the chunk by the current volume settting, create an audioplayer object, set the StopFcn of the audioplayer, and play() the audioplayer. The StopFcn, when triggered, should do the same thing for the next chunk (looking at the then-current volume level) and then delete the current audioplayer.

2) Use dsp.AudioPlayer or audioDeviceWriter() from DSP toolbox. You need to queue multiple samples at a time, but you do not need to keep deleting and creating new players.

[HS Kim]

Thanks a lot. But Can i know that where is the sounding points or where is playing(sorry I know my explan is so bad...) when play() function is working?

And I am so sorry for late accepting :D

[Walter Roberson]

You would need keep track of what you are playing.

For any one chunk, audioplayer has a current sample property that can tell you how far playing has reached relative to the beginning of the chunk.

[HS Kim]

I found CurrentSample by player = audioplayer(y,fs) and get(player) and i did!!!!

Thanks a lot:D

[Mohamed Turkmani]

@HS Kim can you please explain how did you do it?