Play sound depend on the pressure of touch

[liplum]

Basic Support

• The different pressure of touch will change the pitch(?) or volumn(?).
• A toggle to turn it on/off.

Worth Mentioning

• Some platforms don't support pressure detecting, such as web. So hide the toggle in this situation.

More Reading

1. ForcePressGestureRecognizer.
2. Pressure property in PointerEvent.

As to the second particle, if the platform or the pressure can't be detected, the pressure will be 1.0 as default.