In the "record and play global.vi" what is the rate measured in?

[jasonp]

I am recording wav files using the Sound Input VIs. The SI Read VI automatically creates an array that is the length of the buffer size, but I can't figure out how long that is in seconds. I need to know this in order to create spaces of a known time length in the finished wav file.

[Filipe A.]

That will pretty much depend on the sampling rate your sound input device is using to acquire the data. That VI will only define the size of buffer, if you know the sampling rate your sound input device uses, you can multiply the buffer size (number of elements inside the buffer) by the sampling rate and figure out the total time you need.
Hope this helps.
Filipe