curl -X POST https://www.voicelab360.com/api/v1/speech/isolator \
  -H "Authorization: Bearer vl360_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "audio_url": "https://your-bucket.com/mixed.mp3",
    "format": "wav",
    "return_background": true
  }'

{
  "job_id": "job_iso_001",
  "status": "completed",
  "vocals_url": "https://cdn.voicelab360.com/iso/job_iso_001_vocals.wav",
  "background_url": "https://cdn.voicelab360.com/iso/job_iso_001_bg.wav",
  "duration_ms": 180000,
  "credits_used": 2250
}