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It will switch to the source it detects signal so if I turn it off on an analog input or BT and power on my computer (which is connected via USB) it will switch to USB input. Likewise if I connect a BT device. I may have interpreted the feature description incorrectly but it doesn't detect audio...

You're right, no sound while muted. I mustn't have tested that since upgrading the firmware. My bad.

I was able to access a Windows PC and updated my MX5 to firmware version 1.04 (Topping also responded and suggested this.) Unfortunately the problem is still there for me - a high frequency whine from the speakers while the unit is in standby or muted, and analog 'auto-on' is enabled. I have now...

Thanks again. Unfortunately the DFU app won't run on my machine (macOS Monterey). I thought it might be a corrupt archive I downloaded but I've re-downloaded it 5 times and no dice. Even tried one from another Topping product line and same issue. I'm seeing some threads about software licensing...

Oh interesting! Thanks. I couldn't see any other MX5 firmware updates on the Topping download page. I might flash v1.04 in that case. Does the flash tool (I'm on Mac) display the current firmware? I'm not seeing that anywhere in the device settings.

Yes, the default for the RCA and balanced inputs (which are grouped together under the settings) appears to be for the "auto-on" setting to be disengaged. At least that's how my unit arrived. I've tried all the output settings - speakers only, headphones only and both together, I've toggled the...

I registered here to report that I received my Topping MX5 just a couple of days ago from a seller on amazon Germany (in the wrong colour - ordered black and received silver) and I too am experiencing the high pitched noise issue. However in my case I have only been using it as a speaker amp and...