Endless Whisper

Plays an inaudible tone to keep the sound card awake.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Endless Whisper",
  "description": "Plays an inaudible tone to keep the sound card awake.",
  "homepage_url": "https://github.com/pmarks-net/endlesswhisper",
  "version": "1.1",
  "icons": {
    "128": "icon128.png"
  },
  "action": {
    "default_icon": {
      "128": "icon128-gray.png"
    },
    "default_title": "Endless Whisper\nClick to enable/disable sound keepalive"
  },
  "background": {
    "service_worker": "background.js"
  },
  "permissions": [
    "offscreen",
    "storage",
    "alarms",
    "idle"
  ]
}