[innocentblood]

If you have a well ripped SACD with all layers intact in ISO, use this app:
Sonore ISO2DSD

I used this on my Nine Inch Nails 'The Downward Spiral' and Pink Floyd's 'The Dark Side of the Moon (30th Anniversary)' SACD.
Originally I used my friends PS3 a while back.
My friend and I ripped my two above SACD's into ISO only via 1st gen SACD PS3. It's just recently that I converted these ISO's into DSD (DSF).

You must make sure when creating an ISO that the SACD layer is retained. I have never attempted to try this on a PC because I don't believe CD drives can rip an SACD layer, but it's been a while since I check if that's changed or not.

 
thank you very much for this! this is helpful to me. 

 

[TheOneInYellow]

No. Digital filters within the DAC do not provide the same function as decoding file formats, filters, and DSP in the CPU. A DAC can not decode file formats. You are simply mixing the two terms and have spawned many people to think the DAC(s) in the DP-X1 are bypassed by certain apps, which can not be the case. Certain apps may apply DSP filters to improve the sound but they aren't doing the same filtering as what the DAC is doing (which is dealing with the inherent noise of the Delta Sigma approach). Without the filtering in the Delta Sigma DAC the sound would be horribly noisy and no one would purchase the DP-X1. The two go hand in hand and neither is taking over for the other.

You are correct, it is a very complex subject, so best not to generalize and confuse people is all I'm saying.

...

I don't believe all that I condensed is wrong, and I strongly agree with your posts.

The discussion however was to try to explain to users of expensive DAP's why it is not exactly kosher to use apps such as Neutron or PowerAmp; they are DSP based apps.

In any case, I'm out of this topic, however I actually would love to have a drink with you and discuss the finer points of this subject, and we both might get interesting new stuff out of it too.
(Not being sarcastic, it's refreshing to see those who have studied this subject. It's been ten years since I last read up on this).

 

[TheOneInYellow]

It doesn't help that decoding and D/A conversion are called the same dang thing in Chinese. All the translations I had to correct...

***, stupid lecturers 10 years ago...
If that's true, I'm gonna be so pissed...ROAR...

 

[Joe Bloggs]

Sigh, I knew this would occur.

You are correct in everything you have said. You have perfectly described a typical DAC.
Yet as I hinted at, I simplified my points from posts I wrote a long, long while back in this thread.

Yes, a CPU doesn't convert digital to analogue in full, but that was not my overall point.

Though I wasn't clear in my most recent post, only for the sake of succinct'ness, what I was trying to get at is this.

DAC's have multiple functions, two of which are important:

• Receive a digital signal in full and decode it. This is where crucial timing errors, filters, pre/post ringing, noise shaping, and other functions occur,
• Convert the decoded signal into an analogue signal.

So, you are again correct in how DAC's work, both Delta-Sigma and R2R.
But a CPU can be used to do at least the former of the two main purposes of a DAC function; decode a digital signal which then later will be passed along to a DAC, which will convert this into an analogue waveform (voltage), and send this to an amplifier.

It was that that I was referring to, the decoding a digital signal prior to making an analogue signal. The decoding itself.
A DAC can do this of course, but some DAC's have poorer decoding sections (noise shaping, filters, timing, etc). This is where apps such as Neutron and PowerAmp come into play; they use software based algorithms in conjunction with a CPU to decode digital signals, apply various filters etc, then pass that to a DAC for analogue conversion (voltage) only.
In this case, the DAC is only used for its second function, convert decoded digital signal into analogue.

Source? The app developers behind Neutron and UAPP, and past studies in Software Engineering.

Just to add, I really did try to condense a very huge, interesting and complicated topic in the best way I could for everyone, so I apologise for the simplified descriptions overall.

I hope this makes sense.

No. Digital filters within the DAC do not provide the same function as decoding file formats, filters, and DSP in the CPU. A DAC can not decode file formats. You are simply mixing the two terms and have spawned many people to think the DAC(s) in the DP-X1 are bypassed by certain apps, which can not be the case. Certain apps may apply DSP filters to improve the sound but they aren't doing the same filtering as what the DAC is doing (which is dealing with the inherent noise of the Delta Sigma approach). Without the filtering (noise shaping) in the Delta Sigma DAC the sound would be horribly noisy and no one would purchase the DP-X1. The two go hand in hand and neither is taking over for the other.

You are correct, it is a very complex subject, so best not to generalize and confuse people is all I'm saying.

Well, to be fair, the DP-X1 stock player and the Pro Onkyo HF Player apps feature software conversion of PCM to DSD, which is pretty much exactly the same resampling processing a 1-bit delta-sigma DAC would perform prior to the actual D/A conversion. BUT, the ES9018K2M DACs in the Onkyo are not 1-bit DS DACs so it's different after all.

 

[x RELIC x]

Well, to be fair, the DP-X1 stock player and the Pro Onkyo HF Player apps feature software conversion of PCM to DSD, which is pretty much exactly the same resampling processing a 1-bit delta-sigma DAC would perform prior to the actual D/A conversion. BUT, the ES9018K2M DACs in the Onkyo are not 1-bit DS DACs so it's different after all.

Well, that's basically software transcoding isn't it Joe? The ESS9018k2m are multi-level DS DACs to achieve equivalent 32 bit performance with 2 channels per chip. I can't find the white paper for the k2m variant, but the ESS9018S white paper I'm familiar with may be of use if anyone is interested in knowing the workings of the desktop variant:

http://www.esstech.com/files/4314/4095/4318/sabrewp.pdf

Also, to be fair, the I2C control allows software control of DAC features so perhaps that also factors in here with third party apps.

There are so many fine points to the subject. At the end of the day all I'm saying is that the DAC(s) are never bypassed (for the headphone out), which is what has been stated and asked about MANY times in this thread.

 

[NPWS]

I can confirm the 1.29.10 is not the latest SW and try to download the 1.30.8 but it looks like not available yet???

  the update is available now, go to Settings to update  

mine still have no update available, damn it

 

[masterpfa]

  mine still have no update available, damn it

It will come eventually. Sometimes a restart of your device "MIGHT" prompt the update. You have nothing to lose, if it doesn't update immediately you mayget it in a day or two

 

[NPWS]

  It will come eventually. Sometimes a restart of your device "MIGHT" prompt the update. You have nothing to lose, if it doesn't update immediately you mayget it in a day or two

I already restarted, and even turning it off. still no update available this time.
yes, it's just matter of time.

 

[morri]

Does anyone knows how to order the van nuys case that can be shipped to the us !! Amazon jp doesn't and checked another site that charge higher additional rate to ship

 

[TheOneInYellow]

Quick post, got firmware update.

And adding more music to my DP-X1 (David Bowie, etc). Fun times...
(Adding music, tagging, etc, is a chore...but worth it!).

 

[ezekiel77]

Did a mini DAP-off between AK100ii and DP-X1. Basically deciding if I should sell either bcos QP1R has very, very potent poison. Album tested is Eagles: Hell Freezes Over CD Rip, both using SE. Volume-matched as far as possible. Rhapsodio Solar (balanced, mild U-shaped sig) is the control IEM.

Build: AK100ii takes this one. Solid and compact, just the way I like it. Definitely a better stacker with the Mojo. Onkyo is bigger than I prefer, it looks great, feels solid, but it's standing next to an AK.
Interface: AK is straightforward, intuitive, no fuss, just elegant efficiency. The Onkyo feels clumsy and slow, and the music player app seriously lacks aesthetics. Is a straight scrollbar and album cover too much to ask?
Features: Onkyo wins no contest. Lalala.

On to sound...
Bass: DP-X1 is punchier and quicker. A fast, nimble puncher. AK's is softer and sometimes not all there!
Mids: Both are very similar, but AK100ii is just slightly fuller. I can't discern it without intense a/b-ing.
Treble: Thought AK would take this one, but both demonstrate equal smoothness and sparkle. Neither are harsh or overdone.
Soundstage, imaging: DP-X1 is bigger, no question. Wider, taller, deeper, better space and air between instruments, more 3D presentation. Clear win. AK100ii is slower in complicated passages.

Overall a win for the DP-X1. Not a complete whitewash, about 20% better. And you can play Angry Birds with it.

 

[LikeABell]

Thank you.
We need more comparisons between the AK100ii and the DP-X1.

 

[singleended58]

I

Thank you.
We need more comparisons between the AK100ii and the DP-X1.
[/quote

I keep both. AK100ii is paired with Mojo and DP-X1. Both have a different SQ which are addicted to me.
I have listened to QP1R at CanJam SoCal and really did not like it. It is too bassy and overpriced IMO.

 

[OneL0ve]

Just got the latest firmware and software updates. 

 
 

UPDATES​

● 2016/4/12
　update schedule system
　　· DP-X1
　target application
　　· Music app (DAP) ※ Music app only update
　software version after the update
　　- 1.2.0
　update content
　　corresponding to · MQA format
　　improvement of the play list function
　　· AAC corresponds to the gapless playback of the
　　improvement of the stability of music playback
　※ update from 2016/4/12, it will take place from GooglePlay store.​

● 2016/4/11
　update schedule system
　　· DP-X1
　updates after the software version
　　· SW version: 0.1.30.8
　update content
　　and music playback stability improvement of
　　operating improvement of Bluetooth tethering
　　by · Android security improvement correspondence
　　of-future commodity and adds the ability to collect personal information for service improvement (possible whether the permission of the user)　　
　※ update will start sequentially from 2016/4/13. Please take a little if you notice of the update does not appear.​

 

[OneL0ve]

Does anyone know how the DP-X1 handles song play count?
 
When I power off the player and power it back on, the music application opens up and displays the "folder" tab. Also the last song played is not available. No image, nothing. very frustrating. (the X7 remembers the previous play list and last song)
 
This implies to me that it starts from 0 and doesn't remember any songs I played previously. So repeats?