For those too anxious to wait for the user guide, here's a little tidbit on how to use the squelch setting (ONLY NEEDED if you have a feed that the scanning "sticks" on)
Currently the software takes the lowest volume ever heard and
multiplies it by 3-7x depending on what that initial number is. Min
autosquelch is 250. It can be seen when Feed Stats are active:
Low - Current - High - Squelch
If you have a stuck feed, that means the lowest ever heard is a LOT lower
than the "average" (usually due to a hum.) So let's say you see the low
volume of 300, but as you listen you can hear a hum and the "current" is at
an average volume of 1200. The squelch is probably going to be set at 1000
by the automatic routine, so you'll be stuck on that feed. Since you notice
it's normally at 1200, you can set the squelch for say 1500 and you'll be
fine.
Too low and it sticks. Too high and you'll never stop scanning on that
channel. But don't worry about being TOO too high unless you start setting a
squelch of 10000. For most feeds, anything under 2000 is fine. But it's all
relative, and once you have it set (and I have the save routine) you are
done and will never set it again. If you have a feed that's very quiet (i.e.
I'm listening to KSC and the average volume is 3) you can even go lower than
250, I have that one set to 25.
If you mess up and want to start over, enter "-1" and the autosquelch will
do its thing again. Autosquelch rechecks every 1/10th of a second, but if
you manually set a squelch then it's there til you change it.