CHROME users: Beware that Chrome has a tendancy to block sound from Unsecure sites, like mine. I don't have https security as I am not willing to pay for it from my hosting service. Too expensive! However, if you click on the 'Not Secure' section to the left of the URL line and set the site settings to Sound > Allow, then reload the page. You will get sound.
Note of Thanks: I would like to thank Nick N4BUT and Joshua KA6NEW for helping me to get my site going with two RTL-SDRs and a Raspberry Pi 4. I especially want to thank Nick for sharing his source code with me so I could work with his interface and modify it for how I wanted to display my SDR.
Note: I am reworking the Up-Converters that I built to a much better design. So I am only serving 20 and 40 meters for a few weeks.
Hardware (80m, 40m): RTL-SDR v3
Antenna: Buckmaster DX-OCF-HP Multiband Dipole
Original interface design : UB0AZG & SV1RVL
Author of the WebSDR software: PA3FWM
Designer of this interface: N4BUT
Modifications made by: N8MDP