Thought it might be useful to add some examples.

**1) Generate a single cycle sine tone:**

A sine tone is defined by the function (SIN x).

In Nyquist, the “x” value is in radians, so for a single cycle we need values of x to go through 2xPI radians.

2xPI is about 6.283185307

Alternatively, if we want to reverse the phase (offset the phase by 180 degrees), we can use values of x from -3.141592654 to +3.141592654

**2) Generate a 440 Hz tone for 1 second:**

Rather than having to work out how many radians x needs to go through, we can simply make x go through the desired number of cycles (440), and enter the expression

```
(sin (* 2 pi x))
```

and one more example, for values of x from 0 to 1:

```
(* 0.5 (+ 1 (sin (* (+ 0.75 x) 2 pi))) (sin (* 880 pi x)))
```