Upgraded from 3.1.0 to 4.0.1, audio sounds bad now

[poblabs]

Hi there, I upgraded from 3.1.0 to 4.0.1, as well as upgraded to a Raspberry Pi 4.

First thing I noticed was the squelch was always open. So I added the manual squelch option.

Now the audio just sounds bad... unintelligable and sounds "glitchy".

Here's my config, and a sample of the audio I'm getting.

This all worked fine on 3.1.0, so I'm guessing there's an option or two that needs tweaking for 4.0.1 and Raspi 4?

My config options were cmake -DPLATFORM=armv8-generic -DNFM=ON ../

localtime = true;

log_scan_activity = true;

mixers: {
  mixer1: {
    outputs: (
      {
        type = "file";
        directory = "/home/pi/scanner";
        filename_template = "Police";
      }
    );
  },
  mixer2: {
    outputs: (
      {
        type = "file";
        directory = "/home/pi/scanner";
        filename_template = "Fire";
      }
    );
  }
};

devices:
({
  type = "rtlsdr";
  mode = "scan";
  index = 0;
  gain = 20;
  centerfreq = 156.5;
  correction = 40; # was 30 - 40 is ok
  channels:
  (
    {
      freqs = ( 155.370, 158.820 );
      modulation = "nfm";
      squelch_threshold = ( -20, -20 ); # Added in 4.0.1
      lowpass = -1;
      highpass = -1;
      notch = ( 179.9, 151.4 ); # Added in the 3.1.0+ unstable branch: https://github.com/szpajder/RTLSDR-Airband/issues/171
      outputs: (
        {
          type = "mixer";
          name = "mixer1";
          ampfactor = 6.0; # 600% volume, mixers only
        },
        {
          type = "icecast";
          server = "192.168.0.60";
          port = 8092;
          mountpoint = "PD";
          username = "source";
          password = "aaa";
          name = "Police";
        }
      );
    }
  );
 }
);

Police_20211220_09.zip

[poblabs]

I recompiled with cmake -DPLATFORM=native -DNFM=ON -DRTLSDR=TRUE -DMIRISDR=FALSE -DSOAPYSDR=FALSE -DPULSEAUDIO=FALSE ../ and removed the squelch_threshold and it sounds much better.