With the beyerdynamic MIY app you can switch the voice assistant from the standard setting (i.e. Siri and Google) to Amazon Alexa. Please note that you have to install the Amazon Alexa app beforehand.
Important: the installation and setup of the Amazon Alexa app must be completely finished and functional before Alexa can be selected as an option in MIY. Only then will communication via Amazon Alexa take place at all. To remove the Amazon Alexa function, you must reset the voice assistant to the default setting in MIY and uninstall the Alexa app if necessary.