Sound and Vibration
Using Multifunction DAQ for microphone and accelerometer real-time and recorded analysis.
Recorded Wav playback and real-time calibrations mV/EU all behave correctly in 2009.
Update to 2010 has caused calibrations amplitudes to vary wildly with no discernable pattern from the same hardware set-up.
This applies to both accelerometer and microphone direct coaxial connection to NI 9233 through USB-9162.
Reading back a file from a calibrated signal in 2009 gives correct signal probes going right back to the svx-Snd Read Waveform.vi.
Reading the exact same file using 2010 gives a different probe amplitude but the orrect frequency.
Wav Recorder in 2009 and 2010 give the same result so it seems to be a change in the Wav file reading and converrsion to the Waveform amplitude.
