Change a pop-up window's title using a Tampermonkey script?

Is there a way to use Tampermonkey to change the window title for a pop-up (child?) window? (This is for a streaming audio player)

Usually, we would use document.title to change the browser page/tab title for a webpage, but in this case it doesn't work. I believe that is because it is a pop-up spawned by the main webpage.

Is there a way to accomplish this via Tampermonkey.

This is the site with the pop-up I wish to modify. Click the "Listen Now" red button at top right and the pop-up will. I wish to change the title for that pop-up window.

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References I tried/used:

• https://www.sitepoint.com/community/t/changing-the-title-on-a-popup-window/2294/2
• Set title in the window popup

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