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D7 Sidewinder....Initial impressions - Page 12

post #166 of 671

For people using recent Linux distro I have understand some concept with the Audio architecture. I'm using Fedora 15 (KDE).

At the begining Pulseaudio was crackling the sound for me at 24/192, Pulse audio is a layer on the top of ALSA or OSS. Is used to normalise the acces to the differentes audio architecture under Linux. For example if you access directly ALSA another application can't play a sound a the same time. Pulseaudio will avoid this kind of problem. But for me is not important at all and I dont want to use Pulse Audio anymore :)

I have found a solution using another player than Amarok, Audacious 2 can be set to use directly ALSA. With that the problem was gone.

But Amarok have a much better lnterface and a good library management, Amarok is playing through KDE Phonon, is where you can specifie the backend to use (gstreamer, Xine or VLC). But under KDE you can't set the gstreamer output to ALSA (dont know for Xine or VLC backend). The easy way is to remove Pulse Audio with the follwing command under root : yum remove pulseaudio

With SUSE issue the command : setup-pulseaudio --disable
With Ubuntu Gnome use the interface : gstreamer-properties

Hope this help some one.

post #167 of 671

I think the truth is somewhere between me and UElover !

 

Seriously as I say I'm not an expert in audio, I have a very bad sound memory and this is just my feeling more than any analytical aproach.


For me UElover is more credible than me :)
 

Quote:
Originally Posted by shrisha View Post


It's a quite a difference between this two feedbacks from Migou67 and uelover. So what is the actually better then? :)
 

 

post #168 of 671

I think it depends more on taste. Just go with sound you like most!

post #169 of 671
Quote:
Originally Posted by TiEx View Post



Even 1000$ USB cable won't help here. The best way to solve the problem is galvanic isolation of USB power line. Ferrite rings doesn't do anything, rather then make users think that with this ring the cable is EMI/RFI bulletproof. Just google "USB isolator" and you will see couple devices that can really help to solve this problem. http://www.computeraudiophile.com/content/Acromag-USB-Isolator-simple-and-inexpensive-bus-powered-USB-isolation-ADuM4160 Here is a small discussion on USB isolator based on famous ADuM4160. Good luck.

All USB isolator at the moment are not fully compatible with the xmos USB receiver - you'll not be able to playback hi res files. If I remember correctly you'll be scaled back at 48kHz max.

It'll work well with the Maverick D1 nonetheless with great result but most likely won't improve anything on the D7.
post #170 of 671

 

Quote:
Originally Posted by uelover View Post

All USB isolator at the moment are not fully compatible with the xmos USB receiver - you'll not be able to playback hi res files. If I remember correctly you'll be scaled back at 48kHz max.
It'll work well with the Maverick D1 nonetheless with great result but most likely won't improve anything on the D7.


I know about XMOS limitation with USB isolator. I was talking about D1. And also there are many other dacs that can benefit from isolator.

 

post #171 of 671
Quote:
Originally Posted by TiEx View Post

I know about XMOS limitation with USB isolator. I was talking about D1. And also there are many other dacs that can benefit from isolator.



Yup but since we are on the D7 thread I just want to make it clear in case somebody missed it and went on to buy an USB isolator to use with the D7 =)

 

If I am not wrong, USB isolators (which are all only USB 2.0 Full Speed) will not work well with USB audio devices that are of USB 2.0 High Speed configuration. (Correct me if I am wrong)

 

Thus, USB isolators will only help on older specs DACs but not the ones that sports newer USB technology.

post #172 of 671

To bad not so many people know that D7 is class 2 USB DAC thaks to XMOS chip. And if you look here http://thewelltemperedcomputer.com/HW/USB_DAC_Async.htm then you will actually find that xmos is implemented in some really expensive dacs up to 7000$! D7 is 179$ which is a no brainer with lots of nichicon gold Caps wm8740 Dac and +/-5V amp with good opamps used. At this point D7 presents an excellent value. Am thinking to buy D7 for home use.

 

Quote:
Originally Posted by uelover View Post


If I am not wrong, USB isolators (which are all only USB 2.0 Full Speed) will not work well with USB audio devices that are of USB 2.0 High Speed configuration. (Correct me if I am wrong)

Don't know exactly. USB isolator should be compatible with XMOS just with limitation of full speed up to 24/96 music, because the signal line on some isolators is transparent. As far as I read full speed gives up to 24/96 compatibility. So there will be some limitation. I sure think near future will bring us USB isolation chips with high speed with no limitations. Just a matter of time I presume.


Edited by TiEx - 1/31/12 at 7:47am
post #173 of 671
Quote:
Originally Posted by TiEx View Post

To bad not so many people know that D7 is class 2 USB DAC thaks to XMOS chip. And if you look here http://thewelltemperedcomputer.com/HW/USB_DAC_Async.htm then you will actually find that xmos is implemented in some really expensive dacs up to 7000$! D7 is 179$ which is a no brainer with lots of nichicon gold Caps wm8740 Dac and +/-5V amp with good opamps used. At this point D7 presents an excellent value. Am thinking to buy D7 for home use.



I think iBasso killed this product by changing the DAC chip to Wolfson WM8740 from ESS Sabre (I forgot which model). There was much hype prior to the release of D7 but was despised upon after the news of WM8740 as a replacement for the ESS Sabre DAC chip broke out.

 

I can't imagine what this device would be had it been using the ESS Sabre DAC chip. I know iBasso is saving it for their desktop DAC and the DX100. But... Sigh.

 

Not that the WM8740 is bad.


Edited by uelover - 1/31/12 at 7:50am
post #174 of 671

Am listening to some of my favorite songs on my ES5 via the D7. I feel such great joy and happiness that I wanna stay up for the rest of the night just to listen to it.

 

I am not sure how many equipments I have purchased in the past has given me such joy. Not even those that costs 10 times more. =DD

post #175 of 671

for me , I enjoy new joy from my NFB3 when D7 feed it .L3000.gif

 

post #176 of 671

 

Quote:
Originally Posted by uelover View Post

I think iBasso killed this product by changing the DAC chip to Wolfson WM8740 from ESS Sabre (I forgot which model). There was much hype prior to the release of D7 but was despised upon after the news of WM8740 as a replacement for the ESS Sabre DAC chip broke out.

 

I can't imagine what this device would be had it been using the ESS Sabre DAC chip. I know iBasso is saving it for their desktop DAC and the DX100. But... Sigh.

 

Not that the WM8740 is bad.

 

Quote:
Originally Posted by uelover View Post

Am listening to some of my favorite songs on my ES5 via the D7. I feel such great joy and happiness that I wanna stay up for the rest of the night just to listen to it.

 

I am not sure how many equipments I have purchased in the past has given me such joy. Not even those that costs 10 times more. =DD


Thsere is a reason to go with a 8740 instead of es9018. The reason is that es9018 is very hard to implement to make it sound good. But good implementation will cost much more, just take a look at DX100. The other example is Anedio D1 and upcoming D2, it is a very good implementation of es9018, but price tags of 1270$ and 1470$ speak for themself. Not only the DAC chip price matters, but also surrounding circuitry and power supply. Also sigma-delta wm8740 can sound pretty good if implementation is on a good level. That is the case with iBasso D7. For a reference DAC I would go with Anedio D2 but that is a different price category. There is also a discontinued DAC/Amp from Audio-GD called NFB-11 which contains es9018 and has price 275$ but it has average implementation so the sound will be also average for such a good chip. Just read this thread http://www.head-fi.org/t/516886/audio-gd-nfb-11 and you will see how many different reactions of NFB-11 owners there is. Some hate it and some love it. iBasso assumed that wm8740 will be the way to go as its implementation is quite simple and there is a big fanbase of wolfson DAC sound. I think D7 is very good DAC/Amp combo and can't think of anything I would like to change in it.

 

P.S. I think upcoming 4x es9018 DAC from iBasso will have a big price tag and a good implementation to uncover the full potential of es9018. Imagine only price of one es9018 chip of around 40-65$ depending on where you buy them.

 

P.P.S. iBasso didn't killed D7 by switching to wm8740 but on the contrary gave it a life. IMHO es9018 is impossible to implement good in a device with 179$ price. Otherwise with es9018 the price of D7 would be much higher to make it sound good enough.


Edited by TiEx - 1/31/12 at 10:02am
post #177 of 671

I agree last nigth I sleep only 5 hours, loosing time to figure out how to remove Pulseaudio from my linux and listening also :)

Now I can play with Amarok -> Gstreamer -> Alsa and no more mixer from the OS, using the alsamixer directly.

 

This DAC have a great sound.
 

Quote:
Originally Posted by uelover View Post

Am listening to some of my favorite songs on my ES5 via the D7. I feel such great joy and happiness that I wanna stay up for the rest of the night just to listen to it.

 

I am not sure how many equipments I have purchased in the past has given me such joy. Not even those that costs 10 times more. =DD



 

post #178 of 671

I keep the D7 with my MacBook Pro. It is excellent sounding with most any headphone and music and for the price, a no brainer. 

post #179 of 671
Quote:
Originally Posted by jamato8 View Post

I keep the D7 with my MacBook Pro. It is excellent sounding with most any headphone and music and for the price, a no brainer. 



Hey jamato, are there any significant differences (soundwise) between the D7 (incoming) and my D4 (w/topkit)??  Thanks.

 


Edited by JoeyRusso - 1/31/12 at 11:56am
post #180 of 671
Thread Starter 
Quote:
Originally Posted by JoeyRusso View Post




Hey jamato, are there any significant differences (soundwise) between the D7 (incoming) and my D4 (w/topkit)??  Thanks.

IMO, the edge would go to the D7 due to the better performing DAC. I also look forward to John's opinion.
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