Endless Whisper is a free Chrome extension developed by Paul Marks. This handy tool plays an inaudible tone to prevent your sound card from going to sleep. It was specifically designed to address a peculiar bug that occurs when using a Chromebook connected to an external monitor with analog audio out.

When visiting websites with audio, users may experience a loud pop as the sound turns on, followed by another pop several seconds after the audio stops. This can be quite annoying and disruptive. However, with Endless Whisper running in the background, this problem is effectively solved.

While the name suggests an endless tone, the extension actually disables itself when the system is locked or idle for more than 10 minutes. This ensures that the sound card is only kept awake when needed, without wasting unnecessary resources.

Endless Whisper is a free software released under the Apache 2.0 license. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. If you're experiencing issues with your sound card on your Chromebook, give Endless Whisper a try and enjoy uninterrupted audio playback.