I have an Echo Plus (2nd Gen). I have a 3.5mm audio cable connected from my Line-Out port on my PC to the aux port on the Echo. The Echo goes silent when I plug the cable in and the lights look as if it's responding but I hear nothing.
I have checked other forums, some say it's a bug with the iOS app on my iPhone. Some say the bug has been fixed. In the app on my phone in the General settings the AUX Audio is set to "Line Out". When I open the settings the "Line In" is selected and I can swap between In and Out, but if I leave on In or toggle it to Out and then In again, when I go back out to the general settings it still says "Line Out". So for my phone it doesn't appear to be fixed.
I've tried various versions of the following voice commands;
Switch to Auxiliary Line In. Switch to Line In. Play audio from Auxiliary Line In. Play Line In audio.
No matter what I say the lights on the Echo look as if it's responding to me, but I can't hear anything with the cable connected.
I'd rather just use Bluetooth, but when watching a video or show the audio is just a fraction of a second behind what I see on screen so I'd really like to play via Line In somehow.
I am just wondering if it is a Master/Slave issue. Is the 3.5 out designed to connect direct to an audio output device i.e. speaker or hifi? Would a PC be recognised as an audio out device?
I've been very lucky and ,y bluetooth and direct 3,5 connections have all worked seemlessly with speakers. Having totally messed up my wifi/network recently and spent rather a lot of time and money solving the issue (hint - use a hammer and duct tape - always works!) I'm a bit reluctant to give it a home trial here :(
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I'm having the same problem. On my iOS device, under the device settings for my Echo Plus (2nd gen), the AUX option is set to "line-out". When I click on it to change to "Line-In", I am brought to a blank screen with no options to edit, leaving me stuck on Line-Out. I'm trying to plug in my record player, which is capable of playing to external speakers, wired directly to my Echo Plus via an RCA-to-3.5mm cable. Did you ever resolve this issue?