Can you tell me how to measure audio signal frequency in measurement studio with visual basic 6.0?

[kelven]

I'd like to measure two differential input signal(I.e. A+ and A-),below is two test projects,
1.connect A+/A- to PCI 6052E card's ACH0/ACH8 ,and refer to GND for testing
2.connect respectively A+/A- to PCI 6052E card's ACH0/ACH8 for testing
Could you tell me the details of the second project?and give me a illustration in measurement studio with visual basic 6. 0 about the second?
In addition,I would like to measure the audio signal frequency,could you give me a illustration in measurement studio with visual basic 6.0?
Wait for your reply!

[Sean_C.]

Hello Kelven,

Thank you for contacting National Instruments.

I am not sure what you mean when you say "Could you tell me the details of the second project?" Both projects seem to be saying the same thing. You connect A+ to ACH0 and A- to ACH8 to read in differential mode.

For examples of Analog Input in VB6, please see the shipping examples under C:\Program Files\National Instruments\NI-DAQ\Examples\VBasic\Ai .

For examples of Frequency Analysis in Measurement Studio, please see the shipping examples under C:\Program Files\National Instruments\MeasurementStudio\VB\Samples\Analysis\Spectrum\FFT

Let me know if you have further questions.

Sincerely,

Sean C.
Applications Engineer
National Instruments