Initial commit: AI Radio Show web application

- FastAPI backend with multiple TTS providers (Inworld, ElevenLabs, Kokoro, F5-TTS, etc.)
- Web frontend with caller management, music, and soundboard
- Whisper transcription integration
- OpenRouter/Ollama LLM support
- Castopod podcast publishing script

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

generate_callers.py

@@ -0,0 +1,77 @@
+import os
+os.environ["SUNO_USE_SMALL_MODELS"] = "False"
+
+from bark import generate_audio, preload_models
+from scipy.io.wavfile import write as write_wav
+from scipy.signal import butter, filtfilt
+import numpy as np
+
+def phone_filter(audio, sample_rate=24000):
+    """Apply telephone bandpass filter (300Hz - 3400Hz)"""
+    low = 300 / (sample_rate / 2)
+    high = 3400 / (sample_rate / 2)
+    b, a = butter(4, [low, high], btype='band')
+    filtered = filtfilt(b, a, audio)
+
+    # Add slight compression and normalize
+    filtered = np.tanh(filtered * 1.5) * 0.9
+    return filtered.astype(np.float32)
+
+# Define your callers
+CALLERS = [
+    {
+        "name": "caller1_mike",
+        "voice": "v2/en_speaker_6",
+        "text": """Hey, thanks for taking my call!
+        So I've been thinking about this a lot and...
+        I know it sounds crazy, but hear me out."""
+    },
+    {
+        "name": "caller2_sarah",
+        "voice": "v2/en_speaker_9",
+        "text": """Hi! Oh my gosh, I can't believe I got through.
+        Okay so... this is kind of a long story,
+        but basically I had this experience last week that blew my mind."""
+    },
+    {
+        "name": "caller3_dave",
+        "voice": "v2/en_speaker_1",
+        "text": """Yeah, hey. First time caller, long time listener.
+        Look, I gotta be honest with you here,
+        I think you're missing something important."""
+    },
+    {
+        "name": "caller4_jenny",
+        "voice": "v2/en_speaker_3",
+        "text": """Okay okay, so get this...
+        I was literally just talking about this with my friend yesterday!
+        And she said, and I quote, well, I can't say that on air."""
+    },
+]
+
+def main():
+    print("Loading models...")
+    preload_models()
+
+    os.makedirs("output", exist_ok=True)
+
+    for caller in CALLERS:
+        print(f"\nGenerating: {caller['name']}")
+
+        # Generate raw audio
+        audio = generate_audio(caller["text"], history_prompt=caller["voice"])
+
+        # Save clean version
+        write_wav(f"output/{caller['name']}_clean.wav", 24000, audio)
+
+        # Apply phone filter and save
+        phone_audio = phone_filter(audio)
+        write_wav(f"output/{caller['name']}_phone.wav", 24000, phone_audio)
+
+        print(f"  Saved: output/{caller['name']}_clean.wav")
+        print(f"  Saved: output/{caller['name']}_phone.wav")
+
+    print("\nDone! Check the output/ folder.")
+
+if __name__ == "__main__":
+    main()