Hello everybody! I'm new in this forum.
I have received my new Hifi-M8 XL4 two days ago and have some questions for which I have not yet found answers:
1. Does the M8 do any automatic upsampling of the incoming data (in my case from iPhone 6/iPad)?
2. Does it automatically upsample the 44.1kHz signal coming from the iPhone over the lightning cable to 192kHz?
3. Does it automatically upsample higher resolution signals coming via the CCK to 192kHz?
4. From a quality point of view, and since most of my collection is still in ALAC 16/44.1kHz format, is it better to use the iDevice input (via Lightning cable) or the CCK (via USB-B input)? Is there any difference?
5. Is it correct that the M8 does NOT charge my iPhone/iPad when connected via USB-B and CCK?
6. Is it correct that the impedance switch has no effect when using balanced headphones (LCD-2 with balanced cable)?
I use Onkyo HF Player as HiRes Player on my iPhone.
Thanks a lot for your valuable help!
Tom
Switzerland
1. No.
2. No.
3. No. If you have hi-res it with playback as hi-res. say 24/96 will playback as 24/96 with the CCK and USB-B.
4. Just use the lightning cable for this one.
5. I don`t know.
6. I dont know.
+1 to
@DrSheep 's answers here. To expand a bit on #4:
There's no difference at all if most of your music is in ALAC 16/44.1, other than the fact that you can use a shorter / cleaner cable if going directly to iDevice jack
This is one of the big benefits of the HiFi-M8 in that it is iDevice certified, so might as well use it if you can.
BTW, only a few months ago did I realize/discover that the iPhone will actually play up to 24/48 (I didn't know it did 24-bit at all). I prefer using my iPhone as my DAP and using iTunes / Music App, so I had converted a lot of my 24/192 FLAC music to 16/48 ALAC and had to dither. I've since gone through and converted most of my 24/192 FLAC back to 24/48 ALAC (using foobar2000+ SoX Resampler), and no dithering required.
Of course, I still remember when we were all expecting 24/192 from the iPhone without the CCK and we were told Centrance was working on a firmware update to do it... Even though that never panned out, I still secretly hold out hope that come the iPhone 7 (which looks like it may remove the headphone jack), Apple opens up the ability for at least 24/96 out the lightning jack and maybe we do finally get that firmware update!
You can load 24/48 onto your phone but it will still only playback at 16 bits, sorry.
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Does the Centrance Hifi-Skyn plays back 24 bits?.
lets test the Hifi-M8!
Using Flacplayer app (Onkyo app is sub par imho, it also shows the wrong information to mislead the user into thinking they are playing back hi res).
Hifi-M8, USB-A and lightning.
The answer is NO. it still only plays back at 16 bits. (I have a special testing file sent to me for such purposes).
You can load and play back 24/48, 24/96 files etc but it will down sample to 16 bits, sorry.
24/96 down sampled to 16/48
typical 16/44 file.
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Test number two.
USB-B with CCK.
YES. Hi res.
![](https://www.head-fi.org/attachments/1045510/)
24/96 to 24/96 via CCK.
Hmm, i did wonder if it may have changed, but no.
Great explanations, and I though the 24/96 playback was fixed? Try it with Neutron Player and see if it works.
No. sorry.
You CAN play the 24/96 file using an app (flacplayer by Dan Leehr), but it will be down sampled to 16/44 or 16/48 depending on the news of the day.
You can play hi-res 24/96, 24/192 etc via CCK to USB-B but is finicky and troublesome, bulky etc.
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Enter the Centrance Hifi Skyn.
![](https://www.head-fi.org/attachments/1542356/)