init

server/utils/openai.ts

@@ -0,0 +1,8 @@
+import OpenAI from "openai";
+export const openai = new OpenAI({ apiKey: process.env.OPENAI_API_KEY! });
+export const LLM_MODEL = process.env.LLM_MODEL || "gpt-5-nano";
+export const TTS_MODEL = process.env.TTS_MODEL || "tts-1";
+export function atcReplyPrompt(userText: string) {
+  return `You are an ICAO-compliant ATC controller. Reply concisely.
+Pilot said: "${userText}"`;
+}

server/utils/radio.ts

@@ -0,0 +1,8 @@
+import { execFile } from "node:child_process";
+export async function applyRadioEffect(input: string, output: string) {
+  const filter="[0:a]highpass=f=300,lowpass=f=3400,compand=attacks=0.02:decays=0.25:points=-80/-900|-70/-20|0/-10|20/-8:gain=6,volume=1.2[a];anoisesrc=color=white:amplitude=0.02[ns];[a][ns]amix=inputs=2:weights=1 0.25:duration=shortest,volume=1.0,aecho=0.6:0.7:8:0.08,acompressor=threshold=0.6:ratio=6:attack=20:release=200";
+  await new Promise((res,rej)=>
+    execFile("ffmpeg",["-y","-i",input,"-filter_complex",filter,"-ar","16000",output],
+      (err,_,stderr)=>err?rej(new Error(stderr)):res())
+  );
+}