sudo apt update

Install Pre-Requisites:

sudo apt install build-essential libmp3lame-dev libshout3-dev libconfig++-dev libraspberrypi-dev librtlsdr-dev

RTLSDR-AirBand:

wget -O RTLSDR-Airband-5.0.0.tar.gz https://github.com/szpajder/RTLSDR-Airband/archive/v5.0.0.tar.gz
tar xvfz RTLSDR-Airband-5.0.0.tar.gz
cd RTLSDR-Airband-5.0.0
make PLATFORM=rpiv2
sudo make install

Install Icecast2:
It Will Ask You To Enter A Password For Icecast2:

sudo apt install icecast2

Edit rtl_airband.conf:

sudo nano /usr/local/etc/rtl_airband.conf

Paste In The Following, Starting With devices:
Remember To Update The Password For Icecast2:

devices:
({
type = "rtlsdr";
index = 0;    #RTL-SDR Number
gain = 32;    #Gain Setting
correction = 0;
mode = "scan";
channels:
(
{
freqs = ( 123.1, 119.0, 120.5 );        #Add Freq's Here
labels = ( "Tower A", "Tower B", "Tower Control"); #Label Update
outputs: (
{
type = "icecast";
server = "127.0.0.1";
port = 8000;   #Port Number Setting
mountpoint = "stream.mp3";
name = "Airband Voice";   #Name Of Your Choice
genre = "Air Traffic Control";
description = "My Local Air Traffic"; #Description Of Your Choice
username = "source";
password = "Password";   #Icecast2 Password
send_scan_freq_tags = false;
}
);
}
);
}
);


Start RTL_AirBand:

sudo rtl_airband -f

To Listen To The Audio Open A Browser And Type The IP Of The Computer Being Used:

 192.168.x.x:8000/stream.mp3

AirBand GitHub Page: “Click Here”