I'd like to tinker with the USB input of my dac (PC source),
specifically "clean up" power and ground,something like the jitterbug/iUSB/wyrd.
Has anybody done anything similar? any advice where to start?
Filter types, values, what to be careful with or tips?
Cheers!
specifically "clean up" power and ground,something like the jitterbug/iUSB/wyrd.
Has anybody done anything similar? any advice where to start?
Filter types, values, what to be careful with or tips?
Cheers!
Doesn't work with high resolution.
Quote from description: "DOES NOT WORK WITH HIGH RESOLUTION DACs ! Supports max two channels @ 96kHz/24bit. Supports USB Full speed 12mbps only, not USB High speed 480Mbps."
Quote from description: "DOES NOT WORK WITH HIGH RESOLUTION DACs ! Supports max two channels @ 96kHz/24bit. Supports USB Full speed 12mbps only, not USB High speed 480Mbps."
DARN! That's exactly what i was dreaming about last night!
I had no clue it's already done.....fffffffffffffffff
I had no clue it's already done.....fffffffffffffffff
so before I dive into the rest of the things I was dreaming about,
is there a ready made solution to get +/-12 or 15 V from USB?
is there a ready made solution to get +/-12 or 15 V from USB?
Is it possible to completely cut off 5v and ground?
And leave connected only D+ and D-? Would that work?
D+ and D- are a differential signal or two independent signals?
i can't find any detailed info about what's going on inside that USB connector
from wurth....
And leave connected only D+ and D-? Would that work?
D+ and D- are a differential signal or two independent signals?
i can't find any detailed info about what's going on inside that USB connector
from wurth....
Both yes and no, you need at least the ground.
D+ D- is differential. However they cannot be left floating, otherwise when the voltage of both D+ and D- rise too far from the load's ground it will not work.
And a lot of noise comes from having the ground connected.
That is where the isolator comes in handy. Or get SPDIF.
The issue with isolators - transformer or electronic or otherwise - is that they tend to have an upper limit on supported signal frequencies, unless you're willing to pay lots.
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Thanks for te reply!
Do isolators support DSD speeds though?
What is a practical approach?
Ferrites? CLC filters?
And are we talking power/ground lines and/or data?
Do isolators support DSD speeds though?
What is a practical approach?
Ferrites? CLC filters?
And are we talking power/ground lines and/or data?
I use a Jitterbug. Gives immediate improvement in sound clarity and dynamics. Apparently it has isolation and filtering.
It works for 24/192, not sure about higher.
It works for 24/192, not sure about higher.
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There is also this if you want a ferrite: https://www.radioshack.com/products...-toroid-choke-core-2-pack?&variant=5717359237
As you see it can do a ton of loops.
As you see it can do a ton of loops.
ok, I'm having trouble understanding something:
I aim for a (third order?) filter for the data lines, common mode type.
What frequency(ies) do I target? should it be high pass or band pass?
I aim for a (third order?) filter for the data lines, common mode type.
What frequency(ies) do I target? should it be high pass or band pass?
The problem with most of the available isolators is they don't actually isolate the computer noise, the Jitterbug being a perfect example. most noise from the computer is high frequency (I would like to see some figures of how much noise is getting down the USB) the Jitterbug is not laid out with any consideration to this noise and the coupling mechanisms of the noise, so its useless as I believe measurement's on the WEB (and from stereophile I believe) have shown.
I second a ferrite it will do as much if not more than some of the dubious offering....
I second a ferrite it will do as much if not more than some of the dubious offering....
Boky, thank you!
Marce, thanks for joining! I was actually looking forward to your reply
because in another forum I read a reply of yours (I think computer audiophile)
and it was very interesting.
Could you maybe offer your opinion on the below post:
"ok, I'm having trouble understanding something:
I aim for a (third order?) filter for the data lines, common mode type.
What frequency(ies) do I target? should it be high pass or band pass?"
I can't find a source clearly stating which is the bandwidth of data transmitted/received.
Have you tried something like that? Do you think it would offer a better result comparing
to ferrites?
Marce, thanks for joining! I was actually looking forward to your reply
because in another forum I read a reply of yours (I think computer audiophile)
and it was very interesting.
Could you maybe offer your opinion on the below post:
"ok, I'm having trouble understanding something:
I aim for a (third order?) filter for the data lines, common mode type.
What frequency(ies) do I target? should it be high pass or band pass?"
I can't find a source clearly stating which is the bandwidth of data transmitted/received.
Have you tried something like that? Do you think it would offer a better result comparing
to ferrites?
A bit more relevant info on this thread I believe...
http://www.diyaudio.com/forums/pc-based/278547-quick-audioquest-jitterbug-review.html
Also there is another thread with a fully DIY designed isolator.
My mind is rather dulled at the moment, its been a long day at work so I shall return tomorrow, hopefully with a working brain🙂
http://www.diyaudio.com/forums/pc-based/278547-quick-audioquest-jitterbug-review.html
Also there is another thread with a fully DIY designed isolator.
My mind is rather dulled at the moment, its been a long day at work so I shall return tomorrow, hopefully with a working brain🙂
Hello marce, care to take a gander at this? Pi filter on the supply rail, common mode choke on data and an L connecting separate grounds.
USB EMI Noise Suppressor Filter USB Signal Purifier for USB DAC Audio Device | eBay
USB EMI Noise Suppressor Filter USB Signal Purifier for USB DAC Audio Device | eBay
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