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iDSD micro Crowd-Designed! Phase 2: iCLUB video announcement (page 127) - Page 36

Poll Results: What % of your listening is Desktop vs Portable? (click on ONE answer please)

Poll expired: Apr 22, 2014  
  • 22% (30)
    Desktop (100%)
  • 36% (49)
    Desktop (75%) & Portable (25%)
  • 18% (25)
    Desktop (50%) & Portable (50%)
  • 17% (24)
    Desktop (25%) & Portable (75%)
  • 5% (7)
    Portable (100%)
135 Total Votes  
post #526 of 1899
Thread Starter 
Quote:
Originally Posted by hugoboss View Post
 

this xmos optimization . what type of ifi audio range use the newest octacore xmos chipset?

 

is it only the upcoming micro and mini idsd or all ifi dac implemented this?

Hi,

 

Starting from AMR downwards, ALL AMR/iFi products have the dedicated XMOS.

post #527 of 1899
Thread Starter 

A little show update from the Munich show...

 

https://www.facebook.com/iFiAudio

 

More to come later.

post #528 of 1899

Is this micro iDSD using async USB?

 

This is a very good idea!

Note: Final specs may yet change such as the option of adjusting gain.

 

 

PS: Sorry if my english is bad, it's not my native language.


Edited by Vartan - 5/17/14 at 4:06pm
post #529 of 1899
Well yes, it should be asynchronous. It's written on the back of the DSD
post #530 of 1899

One more question, if I got it right, iDSD takes power from the usb, so can I plug it to pc but make it take power from the internal battery?

post #531 of 1899
Quote:
Originally Posted by Vartan View Post
 

One more question, if I got it right, iDSD takes power from the usb, so can I plug it to pc but make it take power from the internal battery?

No. It will charge the iDSD battery instead. Correct me if I am wrong. 

post #532 of 1899
Quote:
Originally Posted by BillsonChang007 View Post
 

No. It will charge the iDSD battery instead. Correct me if I am wrong. 

 

I think it will work either with USB power or battery power (when connected to USB), like the nano iDSD

post #533 of 1899

i believe if you have it connected to USB and then turn on the iDSD, then it is powered via the USB bus. if the iDSD is turned on and then plugged into the USB, it is powered by the battery, but the battery is being charged by the USB. i think that's what iFi said on the nano thread, if i recall correctly.

 

edit: here is the post by iFi confirming this: http://www.head-fi.org/t/711217/idsd-micro-crowd-design-beyond-awesome-software-designers-notes-xmos-scoop/330#post_10468922


Edited by kugino - 5/18/14 at 2:51am
post #534 of 1899
I see from other users that the firmware update is at 4.02 version now... Should anybody update from 4.00 to 4.02?

Στάλθηκε από το Nexus 7 μου χρησιμοποιώντας Tapatalk
post #535 of 1899

Απ: iDSD micro Crowd-Design. Beyond Awesome! Software Designer's Notes (XMOS scoop!)

Quote:
Originally Posted by DomieMic65 View Post

I see from other users that the firmware update is at 4.02 version now... Should anybody update from 4.00 to 4.02?

Στάλθηκε από το Nexus 7 μου χρησιμοποιώντας Tapatalk

Oups sorry.. This was supposed to be for the idsd nano thread!!

Στάλθηκε από το Nexus 7 μου χρησιμοποιώντας Tapatalk
post #536 of 1899
Thread Starter 

Photos from the Munich High-End Show

 

Apologies to all for the slight radio silence over the last few days as we were jammed out at the Munich High-End Show. We are gonna upload more over the coming days:

 

https://www.facebook.com/media/set/?set=a.697664336935978.1073741880.460963790606035&type=3&uploaded=21

 

Good times, good tunes and great company. A few Head-Fi customers who knew about the micro iDSD came to the show and grabbed our cans for a listen! It was a very nice surprise.

 

Just as a teaser...below is Sabine, a very good long-time friend of iFi.

 

Sabine had a listen of the micro iDSD > iTUBE > iCAN micro:

 

 

and this is what she thought of the sound! :L3000:

 

 

Hey, she made our Owen photograph her very apt necklace. We couldnt have said it better ourselves! 


Edited by iFi audio - 5/21/14 at 9:10am
post #537 of 1899
Thread Starter 

Part two of Mark and Gordon's hard work is the XMOS "Star Clocking" Scheme. We hope you like it.

 

Software Design Team's Notes (2)

 

 

XMOS Programming – Star Clocking Scheme

There is the XMOS USB platform and there is iFi XMOS USB platform.

 

Inside the XMOS, there is a radical “Star-Clock” scheme in the iFi-XMOS implementation. This is a major departure from the traditional “Daisy Chain” clocking scheme provided originally by XMOS which many others use.

 

Why?  On the stock XMOS USB platform, we were not 100% happy with the overall jitter level, especially with high-speed signals.  Hence one of our senior software engineers, who has military defence programming experience, spent a few sleepless nights on the XMOS standard source code and discovered that the standard XMOS used a traditional “Daisy Chain” clocking scheme, which is perfectly fine for low-speed audio signals, but not the best topology for high-speed audio signals.

 

The reason he discovered this was he actually did his entire programming in Ada (yes, Ada) when he used to work for military projects.

(Ada was named after Ada Lovelace (1815–1852), who is widely credited as being the first computer programmer)

 

For some background reading:  

http://en.wikipedia.org/wiki/Ada_(programming_language)

 

One of the reasons (of course there are many other reasons too) for doing the military stuff in Ada is because of the real-time requirements (he once working on a targeting system for an air-to-air missile!)

 

So everything must be in real-time and must have zero-timing error. In other words, this guy is "super timing sensitive”.

 

After discovering this, he went on to redesign the whole clocking topology inside XMOS USB platform and utilised a “Star Clocking” scheme which he used before in the missile targeting system he was part of.

 

To put this into an audio context, parallels can be drawn from the JVC “K2” mastering grade clocking scheme below:

 

 

Inside the customised iFi-XMOS, just imagine “what if” all those internal XMOS software modules received their reference clocks from a single, ultra-low jitter master clock?

 

This is exactly what happens and improves the overall system jitter performance significantly and is easily audible as the attack and decay is better presented and everything is just more accurately executed.

 

Next time, Part 3: The Microprocessor.

post #538 of 1899
Thread Starter 

Nice Fujiyama Headphone and Munich HIgh-End Show write-up

 

e-earphone of Japan penned this very nice write-up. We hope you like it!

 

 

http://ameblo.jp/e-earphone/entry-11852192877.html

 

 

"In Japan a big hit and of the next big hit are the "nano iDSD" and "Micro iDSD" respectively.

 
Because the sample version yet, it is not a formal specification, but was able to get to hear it at the iFi-audio.

 

The major difference between the micro iDSD and nano iDSD is that the DAC chip is mounted in a dual configuration. The DAC chip, was developed by Burr-Brown before it was acquired by Texas Instruments. In addition, the DAC chip of DSD1793 has a dual character, native playback of DSD is also possible. Because it belongs to the Micro series, ¥ 50,000 price - that is before and after is expected, but I think that it is going to be a high/cost performance product. It is a at the prototype stage, but still, when released will be a fun product!

 

This report is far from over! So stay tuned! !"

 

Yoroshiku e-earphone!


Edited by iFi audio - 5/23/14 at 8:05am
post #539 of 1899
Quote:
Originally Posted by iFi audio View Post
 

Hence one of our senior software engineers, who has military defence programming experience...

 

Which government did he work for... :cool:

 

Other than that, I have a large selection of xrcd24 CDs and I can clearly hear the benefits of the outlined master clocking scheme against a "common" red book CD


Edited by roamling - 5/23/14 at 7:08am
post #540 of 1899
Thread Starter 

High-End Show Munich (Part 2) Mouth-Watering in every sense.

 

In this second part of, we show you some of the best bits of the show. The following photos is a small snapshot of our daytime and night time activities. Enjoy!

 

https://www.facebook.com/media/set/?set=a.698511440184601.1073741881.460963790606035&type=1

 

As a teaser...

 

All hands on deck at the iFi station!

 

Nice wheels in Hall 2.

 

Munich Pilsner...

 

Munich hefeweizen (wheatbeer). We had to go native to get the good stuff!

 

Rib-eye in a restaurant in the marketplace of the Marienplatz. Succulent and blew you taste buds aways.

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