Markus,
I really believe that the gui is not freezing. What you see is a result
of the fact the the peak detect outputs a binary 1 or 0 signal.
Connect the peak detect to a char_to_float block, and then to a
numbersink. Setup the numbersink for a min of 0 and a max of 1. The
numbersink will clearly show what state the peak detector is in. Make
sure to include a throttle somewhere.
Take a look at the source code for peak detect, perhaps the comments, or
the implementation can help you to figure out what the parameters like
threshold or alpha mean. Also, add a few printfs to the work method, to
verify what the block is outputting, and if its really freezing/stopped
working.
Hope that helps.
-Josh
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