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data format of waveform between LV and Matlab

 

I am considering to use DLL, which exported from LabVIEW function (sound quality toolkit), in a different environment.

 

I have a trouble in reading not so special waveform in Matlab and LabVIEW 10. (see the source code and details)

The data section (double precsion) of waveform (.wav) from reading in each environment are different a little bit.

I think this is a presentation problem related to scale and offset in the data.

1) Does anyone know the reason why it is different when I read the same waveform? or How to scale in different environment to LabVIEW?

 

2) If the waveform deosn't have to have the same absolute value in data section, what about using the DLL in different enviornment?

I mean some functions of LabVIEW will be imported to C++, but the reading (absolute) value is different between C++ and Labview.

In this case, I can expect the different outputs in the functions.

 

Labmaster

For your reference of waveform format, see https://ccrma.stanford.edu/courses/422/projects/WaveFormat

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