Apple is investigating a popping sound issue on the 16-inch MacBook Pro

The 16-inch MacBook Pro.
The 16-inch MacBook Pro.
Following the retail availability of the 16-inch MacBook Pro, some customers have voiced their concerns about a popping sound issue whenever playback is stopped on their devices. Apple has officially acknowledged the matter and is investigating. 
In an internal memo shared by Apple with its Authorized Service Providers, the company advises service staff to not arrange set up service or replace the laptop as it is confirmed to be a software issue. In addition, a fix is planned in future software upgrades.
If a customer hears a popping sound when playback is stopped on their MacBook Pro (16-inch, 2019) 

When using Final Cut Pro X, Logic Pro X, QuickTime Player, Music, Movies, or other applications to play audio, users may hear a pop come from the speakers after playback has ended. Apple is investigating the issue. A fix is planned in future software updates. Do not set up service, or replace the user's computer, as this is a software-related issue.
The 16-inch MacBook Pro was announced via a press release on 13 November and comes with a new Magic Keyboard. Prices start from S$3,499 and a fully decked out model will cost you S$8,619!
Source: MacRumors