Allow the user to skip silence.

[RustoMCSpit]

Feature description

Skip audio which would be considered silent. I realize that the implementation shall involve some kind of threshold, so to prevent it being arbitrary, allow the user to configure the decibel level.

Why do you want this feature?

Because I record lots of meetings. There's lots of undesired waiting as papers are brought through and organized.

Additional information

https://github.com/FossifyOrg/Voice-Recorder/issues/31