Amazon removes voice-command AUX control from older Echo speakers
Amazon has disabled Alexa voice commands like "Alexa, play from line in" and "Alexa, set AUX input" on several older Echo models, including the second-gen Echo Plus, third-gen Echo, original Echo Studio and fourth-gen Echo. Amazon confirmed the change and said it notified a small number of affected customers, but did not explain why the feature was removed. Users can still physically plug in AUX cables and toggle the input via the Alexa app.