How do I sample a frequency or voice input using labview in real time?

[Crono]

This is my first time using labview to sample real-time!  I'm trying to setup a microphone, so that when a voice is spoken to the mic I can sample the frequency, and

further customize the data in labview. The final goal is to amplify the frequency and output it to a speaker. If possible via labview. My question is do I need some type of evaluation board , microcontroller, to sample the frequencies and save the data sample to labview. Also, how would I go by doing this in real-time, or when the person is speaking to the mic the voice/frequency can be modified in labview instantenaeously. If someone can give me a step-by-step way of performing this, please let me know.

I currently use Labview 8.2 and 8.5

[MeghanK]

There are many LabVIEW shipping examples that are built to acquire sound samples from a microphone attached to a sound card.  There is also an example on how to play a sound file directly to speakers, that you should definitely take a look at.  These examples VIs are found in the Sound folder which is under Hardware Input and Output in the NI Example Finder.  Depending on how advanced your frequency analysis will be, you might want to look into purchasing the Sound and Vibration Toolkit.  For your specific application, it doesn't sound like you will need the LabVIEW Real-Time Module, you should be able to obtain very accurate results without it.  Please view the article linked below for more information on this toolkit.  Thanks!

Sound and Vibration Toolkit for LabVIEW

Meghan M.