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Troubleshooting E312 audio issue
Posted: Fri Sep 11, 2020 1:04 am
by stabbyderg
I'm getting a pretty weird issue with two different E312 boxes I've used, which leads me to think that it's something I'm missing, rather than anything being broken.
Basically, when I hook my computer audio output (from two different laptops) up to an E312 and turn on Audio3, it doesn't pick up both of the stereo tracks. Only the A channel lights up.
But (!):
- When I hook that SAME audio output to my 2B box, both channels work just fine, and also...
- When I hook my *iPhone* audio output to the same E312, it works just fine.
What on earth could be happening here? How do I start to diagnose this?
Re: Troubleshooting E312 audio issue
Posted: Sat Sep 12, 2020 11:21 am
by Stimaddict
Audio output/input occasionally throws up some mysteries. I have two 2B boxes and my old MP3 player worked fine on one but not the other. Changed the player and problem solved - go figure!?
If your ET312 works with your iPhone I think you can rule out your unit as the main source of the fault. I would normally say try a different stereo cable and/or audio player device, but your setup works fine with your 2B. Hmm...
So I'd suggest it's probably down to some incompatibility between your laptop's audio software and your ET312. Start by checking the settings and turn off all the audio software 'whistles-and-bells', especially Dolby. If that doesn't work download and install alternative audio software, there are plenty of free ones available.
Finally, if your problem remains unsolved, try a separate USB soundcard. They are very cheap on eBay.
Re: Troubleshooting E312 audio issue
Posted: Fri Oct 15, 2021 3:41 am
by sjg1087
I had the same problem with an ET312, and it turned out the Channel B potentiometer was worn out. I ended up throwing the box out, thinking I could order another one....and now they're discontinued. sigh...
Re: Troubleshooting E312 audio issue
Posted: Fri Oct 15, 2021 11:34 am
by Stimaddict
sjg1087 wrote: ↑Fri Oct 15, 2021 3:41 am
...it turned out the Channel B potentiometer was worn out. I ended up throwing the box out
That's a shame. You can still order new pots from the Erostek website for around $10.
Re: Troubleshooting E312 audio issue
Posted: Fri Oct 15, 2021 2:25 pm
by sjg1087
Stimaddict wrote: ↑Fri Oct 15, 2021 11:34 am
sjg1087 wrote: ↑Fri Oct 15, 2021 3:41 am
...it turned out the Channel B potentiometer was worn out. I ended up throwing the box out
That's a shame. You can still order new pots from the Erostek website for around $10.
Yeah...I should have. Chris (the owner) even suggested I do so, but I was feeling lazy...didn't want to do board level repairs. Oh well...