Audio-GD NFB-2 & NFB-3 Delivery & Impression Thread - Page 101

If I am not using acss should I have my LED light displaying "1" or "2" between the filter "flavor" and the input selector?

I was about to order an NFB-2.1 and a friend offered to lend an NFB-3 (96) for audition.

It worked fine connected to CD via coax and also fine connected to my laptop via usb cable.

However, no matter what, it does not work via M2Tech HiFace (Not the EVO).

I use Foobar +wasapi . Wasapi sees the driver as it offers M2Tech as option.

Anyone faced anything analogous ?

Quote:

Originally Posted by GSX1 

Its related to both   if you feed 192khz material to any of the 2x filters there will be no roll-off in the audio band.  Alternatively you can upsample to 196khz with Sox and feed the wm8741 set to 2x and none of the filters will roll-off below 20khz.

 

Its when you feed 44.1 to a 2x filter that you get the rolloff.  Just look at the graphs in the wm8741 datasheet,  its the same as the audiogd.

 

Can you please put this in layman's terms. I've had an NFB-2 for about 10 months and the treble roll-off is driving me mad, I've been considering spending double on another DAC just to get something of comparable quality with treble.

What I need to know is:

1. How to change the jumpers - where are they, what do they look like

2. What precautions to take (ie: do I need to discharge static first, allow the unit to cool down for half an hour, or avoid touching the case, etc...)

3. Which configuration to change them to,  to eliminate any treble roll-off, and retain the most neutral sound for FLAC's through Foobar (44.1 kHz, 16 bit, Kernel-Streaming, USB).

Kingwa has sent me the diagrams for the NFB-2, so you can refer to them.

He recommends 8x oversampling. So I'm leaning towards Filter 9.

Originally Posted by rakisan 

I was about to order an NFB-2.1 and a friend offered to lend an NFB-3 (96) for audition.

It worked fine connected to CD via coax and also fine connected to my laptop via usb cable.

However, no matter what, it does not work via M2Tech HiFace (Not the EVO).

I use Foobar +wasapi . Wasapi sees the driver as it offers M2Tech as option.

Anyone faced anything analogous ?

hiFace (original USB "stick") has a (deliberate?) "flaw" - it creates SPDIF stream with higher voltage than SPDIF standard prescribes. Some DACs can handle (and even benefit from) this higher voltage, some not.

If you are using BNC version of original hiFace, you can chain -6 dB, -10 dB or even -15 dB BNC attenuators between your hiFace and DAC. Attenuators will lower the hiFace's SPDIF signal to values your DAC will, most probably, accept.

Thank all.

Kingwa said something similar. It is probably the higher voltage.

On the other hand the DIR9001 cannot handle the 192K from M2T regardless the material.

Case closed

Quote:

Originally Posted by geraldsmallbear 

 

 

Can you please put this in layman's terms. I've had an NFB-2 for about 10 months and the treble roll-off is driving me mad, I've been considering spending double on another DAC just to get something of comparable quality with treble.

 

What I need to know is:

 

1. How to change the jumpers - where are they, what do they look like

2. What precautions to take (ie: do I need to discharge static first, allow the unit to cool down for half an hour, or avoid touching the case, etc...)

3. Which configuration to change them to,  to eliminate any treble roll-off, and retain the most neutral sound for FLAC's through Foobar (44.1 kHz, 16 bit, Kernel-Streaming, USB).

 

Kingwa has sent me the diagrams for the NFB-2, so you can refer to them.

He recommends 8x oversampling. So I'm leaning towards Filter 9.

Use a bit your brain ^^ but i will help you anyway .

1) Use google : Electronique Jumper , or wiki 

http://upload.wikimedia.org/wikipedia/commons/c/c7/Jumperblock-shunts.jpg

http://en.wikipedia.org/wiki/Jumper_(computing)  

(Jumper : cover 2 pins) .

http://www.audio-gd.com/Pro/dac/NFB-2/NFB-2setting.JPG  (should be enough to help you finding them)

http://www.audio-gd.com/Pro/dac/NFB-2/NFB2EN.htm

(fond on discontinued products : audio gd price list )

There is 4 jumpers , black they are , on the picture from audio GD they took off the 2 black module where is write "DAC 19 Audio GD" (you can see the pins for connecting them) , so there is jumpers that are very close to them when you will try to find it .

2) Well just discharge statics , unplug the power cord and open your unite , don't need to wait , it's not hot ...

3) Filter 9 is what you need ^^ 

sorry for my english 

Quote:

Originally Posted by HaVoC-28 

 

Use a bit your brain ^^ but i will help you anyway .

 

1) Use google : Electronique Jumper , or wiki 

 

http://upload.wikimedia.org/wikipedia/commons/c/c7/Jumperblock-shunts.jpg

http://en.wikipedia.org/wiki/Jumper_(computing)  

 

(Jumper : cover 2 pins) .

 

http://www.audio-gd.com/Pro/dac/NFB-2/NFB-2setting.JPG  (should be enough to help you finding them)

 

http://www.audio-gd.com/Pro/dac/NFB-2/NFB2EN.htm

 

(fond on discontinued products : audio gd price list )

 

There is 4 jumpers , black they are , on the picture from audio GD they took off the 2 black module where is write "DAC 19 Audio GD" (you can see the pins for connecting them) , so there is jumpers that are very close to them when you will try to find it .

 

2) Well just discharge statics , unplug the power cord and open your unite , don't need to wait , it's not hot ...

 

3) Filter 9 is what you need ^^ 

 

 

sorry for my english 

he should 1st confirm with audioGD whether that his NFB2 is the jumper version or not.

Quote:

Originally Posted by IndieScent 

he should 1st confirm with audioGD whether that his NFB2 is the jumper version or not.

Yeah , but since he is in contact with audio GD , and King Wa i though that he clearly have a NFB-2 with Jumpers ^^ , and unscrewing some screws is not a hard task no ? 

I've had this dac (3.1) for about two weeks now and I really really like it.  In fact, I am completely content with my headphone setup.  From this point forward I will probably just focus on building up a stereo system, of which my nfb 3.1 will definitely be a part.

Seems like he has some nice upgrades in the NFB 2.1 vs the original NFB-2.

Selectable switches(old nfb-2 didnt even let you choose), a display and possibly even an upgraded circuit.

Still enjoy the bifrost more in my current setup than I did the NFB-2 but still quite nifty.

Quote:

Originally Posted by HaVoC-28 

 

Yeah , but since he is in contact with audio GD , and King Wa i though that he clearly have a NFB-2 with Jumpers ^^ , and unscrewing some screws is not a hard task no ? 

well considering his question I would say it is indeed safer for him to confirm 1st. but yes unscrewing some screws is indeed not hard task.

Quote:

Originally Posted by IndieScent 

well considering his question I would say it is indeed safer for him to confirm 1st. but yes unscrewing some screws is indeed not hard task.

I didn't realise Nusantra was the Indonesian name for Indonesia, I'll have to add that one to my list.

I haven't got the cover off yet because one of the screws is already rounded off slightly from the factory and I've decided to buy a new set of little specialised screw-drivers as all mine are large and magnetised.

After some grunt work sifting through the ambiguous self-referencing groupspeek on this and other forums I've installed a decent resampler and the effect is almost exactly what I was after.

http://www.hydrogenaudio.org/forums/index.php?showtopic=67373

With this resampler set to Best, 99% Passband, 50% phase and 96k and Foobar set to 24 bit and my Sound control panel set to 96k/24bit I'm getting an almost ideal sound, the highs are definitely there, where they weren't before. I still detect a hint of roll-off, but my DAC has just been refurbished and needs time to burn-in all over again.

The Secret Rabbit one doesn't seem to work any more, and it's virtually impossible to get some cogent narrative out of anyone trying these things out.

To the other person....Thanks for the above picture, it was the one missing piece, though I generally avoid taking advice from anyone who says 'See, it's simple, anyone can do it', when referring to fiddling with highly specialised pieces of equipment, it's nothing personal. I'd rather approach it with the proper reverence and get it right first time.

I'm still curious to see how the oversampling will interact with this resampling plug-in and in the interests of science I'll post the results when I'm able to experiment.

Also it might be worth noting I'm using Kernel Streaming and my DAC has been upgraded to a +6db output (5volts). I'm using Ribbon Tweeters which go well above the average threshold of hearing.... AND I've tried the noise-shaping plug-in mentioned on this forum and it was horrendous, I survived about 10 seconds gritting my teeth (which ironically opens the ear canal and makes it worse).

Quote:

Originally Posted by geraldsmallbear 

I didn't realise Nusantra was the Indonesian name for Indonesia, I'll have to add that one to my list.

 

I haven't got the cover off yet because one of the screws is already rounded off slightly from the factory and I've decided to buy a new set of little specialised screw-drivers as all mine are large and magnetised.

 

After some grunt work sifting through the ambiguous self-referencing groupspeek on this and other forums I've installed a decent resampler and the effect is almost exactly what I was after.

 

http://www.hydrogenaudio.org/forums/index.php?showtopic=67373

 

With this resampler set to Best, 99% Passband, 50% phase and 96k and Foobar set to 24 bit and my Sound control panel set to 96k/24bit I'm getting an almost ideal sound, the highs are definitely there, where they weren't before. I still detect a hint of roll-off, but my DAC has just been refurbished and needs time to burn-in all over again.

 

The Secret Rabbit one doesn't seem to work any more, and it's virtually impossible to get some cogent narrative out of anyone trying these things out.

 

To the other person....Thanks for the above picture, it was the one missing piece, though I generally avoid taking advice from anyone who says 'See, it's simple, anyone can do it', when referring to fiddling with highly specialised pieces of equipment, it's nothing personal. I'd rather approach it with the proper reverence and get it right first time.

 

I'm still curious to see how the oversampling will interact with this resampling plug-in and in the interests of science I'll post the results when I'm able to experiment.

 

Also it might be worth noting I'm using Kernel Streaming and my DAC has been upgraded to a +6db output (5volts). I'm using Ribbon Tweeters which go well above the average threshold of hearing.... AND I've tried the noise-shaping plug-in mentioned on this forum and it was horrendous, I survived about 10 seconds gritting my teeth (which ironically opens the ear canal and makes it worse).

nusantara just some old name kinda thingie. I just love to use it instead the oh so obvious official name.

also I would suggest using wasapi instead of kernel streaming. imo it sound alot better.

Quote:

Originally Posted by IndieScent 

nusantara just some old name kinda thingie. I just love to use it instead the oh so obvious official name.

 

also I would suggest using wasapi instead of kernel streaming. imo it sound alot better.

 

I could never go back to WASAPI after Kernel Streaming, and I'd have to change virtually every setting back to lower quality and lose all the benefits of that tweakage.