Mute Chromecast if ads are being played.

[grische]

The current version of ad-free does detect ads while music is streamed to a Chromecast, but it doesn't mute the Chromecast.

[abertschi]

To my knowledge there is no official way for an application to control volume on a Chromecast when the app itself is not providing content.

The Google Home app has such capabilities, however.

A way to approach this feature is to reverse engineer how Google's app does it and integrate it into Ad-Free.

I will flag this as a feature-request. Currently I don't have time for this.