https://www.sony.com.hk/en/electronics/support/home-theater-sound-bars-home-theater-systems/ht-z9f/downloads/00016892
Adds support for Chromecast built-in for Audio v1.40
Improves Chromecast built-inconnectivity
Support Chromecast built-in for Audio v1.36
Improved Chromecast built-in connectivity
Available to use "Spotify Connect" even with a free account
Add support for the Amazon Alexa™ Multi-Room Music (MRM) feature
Note: Amazon Alexa is not available in all languages and countries/regions.
Improves HDMI® connectivity
Fixes an issue where a sound is heard when exiting some PlayStation®4 games
Improves the failure of network event which occurred in version 1.816
Adds support for the eARC feature
Notes:
eARC is a new HDMI 2.1 standardized function which adds support for the latest audio formats, in addition to audio formats supported by the existing Audio Return Channel (ARC) function.
The eARC feature allows you to enjoy lossless object-based audio content such as Dolby Atmos®-Dolby TrueHD® and DTS:X®, or multi-channel LPCM content that cannot be transmitted with the ARC function.
Adds Amazon Alexa® functionality
Note: Amazon Alexa is not available in all languages and countries/regions.
Improves connectivity with other manufacturer’s TVs
Supports Spotify playback via Spotify Connect
Supports Wireless Multi-room