Pitch analysis and silence vs. speech detection with SignalLab

[angelcaf]

Hello,
I am new to SignalLab but I have been succesfully using VideoLab before.
Before asking my question I will put down some context (schematically)

- Real time audio processing
- Input is a mic
- Single user

This is what I need to do and my question is how using SignalLab?

1 - Need to detect whether the user is speaking or there is silence
2 - Need to do basic pitch analysis: within a region of the past 100ms of input I need to take two points (pitch value) and check whether there has been a raising/falling pitch of 30Hz.

What are the SignalLab components that I need to use for that?
Is it possible to detect (1)?
Please note that I would need to use some code for that and not just the visual components since i will need to use those information (voice vs. silence) for a higher level algorithm.

Thanks a lot in advance!
Angelo