developing a simple echo sounder

[Giacomo]

Dear All

I am a final year science student trying to use Laview 4.1 in order to produce and run a virtual echo sounder. My main problem is that i need to retrieve a sound echo from an underwater microphone and record and display the signal using labview 4.1. Is there a VI that allows the user to record sound? and if so can, where can i find it?

Thanks

Giacomo