Jacek wrote:

> vtblank from version 0.8 behaves differently

Yes for version 8 onwards vtblank does a better job
of tracking the noise floor (the gaps between sferics).

That means you have to use a different value for the
-a automatic threshold option.   Prior to version 8,
a typical night setting would be -a 1.2 and daytime
might be -a 2.5.

For version 8 onwards it is more like -a12 and -a25,
if in doubt use about 10 times the old setting.

You can also use a longer time constant, eg -t 100
with version 8, where before -t 10 seemed to do best.

--
Paul Nicholson
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