Ham Radio simulator: live streaming microphone audio between 2 browsers, connected via ubuntu 22

I am trying to simulate a radio with a PTT button. Connected users should be able to live voice chat in the group, one at a time, while holding a button. I have a Ubuntu 22.04 server running, with nginx, but unfortunately nothing seems to work. I don't know exactly what a good method should be. I tried using sockets but i keep getting console errors (on Firefox) like: Media resource blob:https://mywebsite could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006) How exactly would a live audio browser transmission protocol look like? async function startTransmission() { if (!mediaStream) { try { mediaStream = await navigator.mediaDevices.getUserMedia({ audio: true }); mediaRecorder = new MediaRecorder(mediaStream, { mimeType: "audio/webm;codecs=opus" }); mediaRecorder.ondataavailable = (event) => { if (event.data.size > 0) { socket.emit("audio-stream", event.data); } }; mediaRecorder.start(300); // Send audio in 300ms chunks logMessage("🔊 Transmitting Audio..."); } catch (error) { console.error("Microphone access denied:", error); logMessage("⚠️ Microphone access denied."); } }} and server: socket.on("audio-stream", (audioData) => { io.emit("receive-audio", { audioData, mimeType: "audio/webm;codecs=opus", senderId: socket.id // Send the sender's ID so they can ignore their own audio });});