Yes, only when off or when connected with USB, if the audio interface (which I use to monitor the M8) is connected to the same power source (in my case computer).
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Same here, a hum when USB & Audio connected, and the M8 is off. Switching on the M8 will stop the hum.
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Thanks to all for the feedback on the hum issue. The fact that Iām apparently not alone with this quirk calms me. Now I can live with it knowing itās normal and not a defect.
I hope that the next hardware iteration of the M8 will eliminate this problem, because itās not what I expect from a device in this price class.
It actually sounds like itās both normal and a defect 
2023-10-12 - Version 3.2.5
Fix: Rendering could cause file corruption when samples have not been initialized/played before rendering began
Fix: Rendering could have wrong length
Fix: Rendering could have an initial fade-in at beginning
Fix: Sample editor loop point playback could sound incorrectly when the loop end point was at end of file
Fix: Midiout Instrument: Help text for MPB and MPG was wrong
Fix: Big font mode could display the wrong mini map when quickly navigating screens
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Spoke too soon - yes, hum when off and audio plugged in. Goes away when switched on, as per others. Guess it is a āfeatureā! (thatās without the USB connected - when it is I then get additional noise but Iām ok with using it on battery in that case!).
Headphones plugged in directly all fine in any configuration,
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Of course I also emailed Timothy about this. It is related to the fact that the output of the M8 is a headphone output. That may explain it, but not excuse it. Other battery-operated units that only have a headphone output (e. g. AIRA compact and Volcas) donāt cause hum when turned off.
I know, this is a first world problem 
But my KRK speakers take 15 seconds to ābootā, so I like to leave them on after I turn off the M8. Thatās why this issue annoys me a little bit more than it should.
Thanks for the update, I thought it might be something to do with that (impedance?). Nothing that can be put in-line I guess?
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I donāt know. I only know that the noise floor of the Volcas is affected by the impedance of the headphones. But that has nothing to do with any hum.
If I understood Timothy correctly, modifying the current hardware would negatively affect the headphone level. After all, thatās not what we want to happen.
My M8 is out for delivery. Hopefully it will get to my house today, where my partner is working from home and can therefore receive it.
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Is there a way to identify the firmware version from within the OS?
Yes, pay attention to the bottom of the screen at startup.
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When did you order yours?
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BRK unit arrived, so quick to get from LA to Sydney! Can hardly notice the blemishes at all on this one! Really have to hunt for them. Nice to finally have a production unit and my partner is excited to use my beta one.
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Good to hear! I ordered a BRK unit last week. For $100 off regular price, it seemed like a deal. Looking forward to receiving mine.
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Same here! Hoping it will arrive within a week (Netherlands) so I can bring it on our family holiday.
I ordered mine the previous Tuesday, so it took a week and a half to arrive. Orders are shipped on a Monday, though, so maybe I would have got it in a week if Iād ordered it on the Friday!
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Anyone recorded samples onto their M8 via USB? Just starting to explore the sampler and, of course, the first thing to learn is how to get samples onto the device.
Iāve copied them direct to the micro SD cardā¦cool but while Iām sat with my Mac Book Pro thought Iād try the recording over USB. Not seeing any audio at the M8ā¦what do I need to do to get the MBP to route audio over USB?
Edit: As so often happensā¦writing my question here makes me rethink the issue. Of course, the problem was just that the MBP wasnāt routing the audio over USB. Just had to select the M8 as my audio out and it all works wonderfully.
Thought Iād confess my stupidity and share the answer here rather than deleting the post in case anyone else is as dim as me.
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I have to admit Iāve never attempted to sample on my M8. When I bought it (pretty early on) my intention was to load a bunch of samples, unfinished jams, riffs, stems etc onto the SD card and use it as a writing tool while traveling and thatās pretty much what Iāve done. I am surprised at how often I use it at home, but I still keep that same mindset of figuring out uses for the things Iāve loaded in there previously. Or sometimes Iāll use it at home as a midi sequencer, but something about that box makes me prefer using it standalone
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M8 seems like a gamechanger. Iām afraid that if I bought one Iād end up neglecting my other gear even further than I already am currently.
I can relate to this, the form factor of something like this makes you really want to embrace the freedom of having a music gameboy that you can take anywhere at any time, thatās how Iād feel about it probably. Regardless I think Iād try hooking up various gear with it but standalone seems to be an otherworldly type of inspirational.
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