How to create a huge wav file containing multiple tracks?

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I recorded five audio tracks (48kHz, 32bit, 1h) which I would like to write into one file with 5 channels à (48kHz, 32bit, 1h). When I simply read the tracks with audioread , I run out of memory. Using system objects didn't help as it turned out that dsp.AudioFileWriter does not allow to write more than two channels at once. Is there another technique how I could achieve that?

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Roman 2014-12-12

在 MATLAB Online 中打开

In version R2013b dsp.AudioFileWriter can handle more than 2 channels. However, if I copy one channel with the system object approach as shown below,

hafw = dsp.AudioFileWriter(RecFile,'FileFormat','WAV','SampleRate',hafr0.SampleRate);
hafr0 = dsp.AudioFileReader(PlayFile0,'SamplesPerFrame',SamplesPerFrame);
playbuff = zeros(SamplesPerFrame,5);
while ~isDone(hafr0)
    playbuff(:,1) = step(hafr0);
    step(hafw,playbuff);     
end