Function fromScalar

fromScalar(scalarValue: number): number
Makes a scalar into a bipolar value.

That is, input range is 0..1, output range is -1...1
```
import { Bipolar } from 'https://unpkg.com/ixfx/dist/data.js';
Bipolar.fromScalar(1);   // 1
Bipolar.fromScalar(0);   // -1
Bipolar.fromScalar(0.5); // 0
```
Throws an error if scalarValue is not on 0..1 scale.
Parameters
- scalarValue: number
  Scalar value to convert
Returns number
Bipolar value on -1..1 scale