Help finding the right settings about rtlsdr-airband HOT 1 OPEN

What software were you using on the windows machine?

Your correction seems very high for a RTL-SDR.COM dongle, I haven't seen more than +/- 3 on any of the ones I have used. Are you sure that value is correct?

Your gain is also maxed out and that seem suspicious.

I wonder if you correction is wrong so the frequency is shifted off yet you're still able to pick something up because the gain is cranked so high . . . .

Setting squelch_threshold may be needed, but I would expect the auto squelch to do a good job, I would try removing that for now.

I dont think it's your problem, but sample_rate defaults to 2.56 MHz, and in my configs using the RTL-SDR.COM dongles I override it to 2.4 MHz. Also, I use these global configs, but once again I doubt It would have any impact as you're only running a single dongle:

multiple_demod_threads = true;
multiple_output_threads = true;

What I would recommend doing is using SDR++ (https://www.sdrpp.org use the nightly build) to dial in your gain and correction and make sure you're getting good audio out. Once you've verified the hardware / gain / correction then you should be able to match that audio quality with rtl_airband. Also, to reduce variables I would focus on your most active frequency (ie not scan mode) first.

from rtlsdr-airband.