Help finding the right settings

[Muscledspider77]

So long story short I started to feed my local's airport ATC to LiveATC using a RTL-SDR.COM V3 and sdr++ on Windows, now I bought a Pi and transferred it over, the issue is I tried all gain's and I still don't get the audio I used to, it's not the antenna or receiver since it works and sound's perfect with SDR++, it's the config, could anybody help me please it would be much appreciated.
I attached the config below and as well 2 audio clips before and after. (in the first you could clearly hear the pilot and controller ,with the pi you can barely hear the pilot)

devices =
({
type = "rtlsdr";
index = 0;
gain = 49.6;
correction = 12;
mode = "scan";
channels = (
{
freqs = ( 133.300, 118.100, 128.975 );
squelch_threshold = -20;
outputs = (
{
type = "icecast";
server = "audio-in.liveatc.net";
port = 8010;
mountpoint = "CENSORED";
username = "source";
password = "CENSORED";
name = "---";
genre = "ATC";
});
});
});

Archive.zip

[charlie-foxtrot]

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.