Function beep::beep

pub fn beep<F, N>(frequency: F) where
    F: Frequency + Into<Hertz<N>>,
    N: Num + ToPrimitive, 

Play an indefinite tone of a given frequency.

For instance:

extern crate beep;
extern crate dimensioned;

use std::{thread, time};
use beep::beep;
use dimensioned::si;

fn main() {
  beep(440. * si::HZ);
  thread::sleep(time::Duration::from_millis(500));
  beep(si::Hertz::new(880));
  thread::sleep(time::Duration::from_millis(500));
  beep(0. * si::HZ);
}