how can i get highly Sampling Rate

i want 2MHz Sampling Rate,thanks.

You can set the Project Rate to 2000000 Hz by typing into the box in the lower left corner of the main Audacity window. Don’t expect your sound card to work at 2 MHz.

i can only set 100000Hz most highly

Which version of Audacity? (look in “Help > About Audacity”)
Which operating system?

What are you trying to do?

maybe im doing a hackrf project.i think 2000000MHz sample rate will solve my issue.But this day i know its not depend on sample rate. poor english.thanks for your answer. :smiley: