Analyzing PCM audio samples

[brijomad]

I have a need to recover frequency and level information from a PCM stream that has been written to a file.

The PCM data is 16-bit signed, little-endian, sampled at 8Khz.

What CVI functions (if any) can be used for such a task?

Brian

[Manooch_H]

Hi Brian,

To my knowledge there are no specific CVI functions that will accomplish this. 

[jr_2005]

You should be able to read in the data portion of the file (skipping over any header such as may accompany a .wav file) into an array and then submit it to functions in the Advanced Analysis Library (you need the FDS version of CVI for these). PowerFrequencyEstimate() is just one of a number of functions you might find useful.

JR