GoKawiilAmazon disables Alexa voice commands for Echo AUX input on older speakers
Amazon has removed Alexa's voice control over the AUX input on several older Echo devices, including the Echo Plus 2nd Gen, Echo 3rd Gen, Echo Studio 1st Gen, and Echo 4th Gen. Commands like "Alexa, play from line in" no longer work, though the physical 3.5 mm AUX ports still function and users can still toggle AUX input manually through the Alexa app.