Hello,

I am not sure how to set auto gain on a RTL dongle.   I ran across this which I think should be what I need:

    http://cgit.osmocom.org/gr-osmosdr/tree/grc/gen_osmosdr_blocks.py

From that page:

  <param>
    <name>Ch$(n): Gain Mode</name>
    <key>gain_mode$(n)</key>
    <value>False</value>
    <type>bool</type>
    <hide>\#if \$nchan() > $n then 'none' else 'all'#</hide>
    <option>
      <name>Manual</name>
      <key>False</key>
    </option>
    <option>
      <name>Automatic</name>
      <key>True</key>
    </option>
  </param>
However it is not clear what I need to pass to make auto gain happen.

Thanks,

John