Speech Synthesis Markup Language (SSML) Reference | Alexa Skills Kit
Alexa Routines now let you play music and adjust the volume | AFTVnews
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Amazon's new 'adaptive volume' will make Alexa speak louder when it's noisy - The Verge
Amazon's new 'adaptive volume' will make Alexa speak louder when it's noisy - The Verge
Reminder that Spotify defaults to “Audio Normalization” of Normal, compressing the dynamic range of your music even if you have download quality set to Very High. This is a volume normalization feature