Xbox Series X won't have SPDIF optical audio, or an IR blaster (update) | Windows Central
Phil Spencer Explains Why the Xbox Series X Doesn't Have an Optical Audio Port - IGN
Digital Optical Audio Cable SPDIF Coaxial Cable 5.1 Channel for Amplifiers Blu-ray Player Xbox 360 Soundbar Fiber Cable;Digital Fiber Audio Cable SPDIF Output Cable 5.1 Channel Power Amplifier - Walmart.com
The Xbox One S: A closer look (pictures) - CNET
Another port bites the dust: Xbox Series X drops S/PDIF audio | Ars Technica
2M 6FT Premium Fiber Optic Cord Optical Audio Cable XBOX ONE PS4 SPDIF Toslink 101 _ - AliExpress Mobile
互換性のあるヘッドセットを接続する | Xbox Support
LS31 Setup for Xbox One | LucidSound
Phil Spencer Explains Why the Xbox Series X Doesn't Have an Optical Audio Port - IGN
Another port bites the dust: Xbox Series X drops S/PDIF audio | Ars Technica