Pat Farrell said the following on 02/03/2006 04:00 AM:
mamsterla wrote:
ArtDIO digital board only DAC - I basically removed the digital board,
I'm not Gary, but is the ArtDIO DAC actually better than the SB3?
When the Art DIO was released a while back, it was a budget pro-audio
mamsterla Wrote:
GaryB:
I think I know your posts from the DIOMods Yahoo group.
My question is would it be worth putting the transformer in on both
sides - SB2 and ArtDIO.
What other SB2 mods would you recommend for a digital only transport if
that is the best for my setup? BTW,
If you'd like to use the digital volume control, but still want to
preserve as much resolution as possible, try adding a fixed passive
attenuator just before your power amp.
My SB3 hasn't arrived yet, but I tried this with an NAD 118 digital
preamp, which has the same problem of losing
)p( Wrote:
@ezkcdude
Ah what a shame that happened. Sorry to hear that.
I'll be careful with mine when it arrives. If it sounds ok after some
burnin I hope I can live with the included powersupply. I'll let you
know in this thread what I think about the sound of it after a week or
so
markgwoodruff Wrote:
If you'd like to use the digital volume control, but still want to
preserve as much resolution as possible, try adding a fixed passive
attenuator just before your power amp.
I think this is a good post, unfortunately I'm too green to actually
know.
From the SPDIF 16 or
bsquare Wrote:
you aren't quite getting it: the usb output from the sb would go to a
usb dac, not to a pc.
bb
With the risk that this has been answered already:
Do really USB sound cards work without a PC with associated software
drivers?
I suggest using a cheap laptop running
Since I'm not an electrical engineer, may logic may be flawed, but
here's my proposition as it concerns switching vs. linear power
supplies, and also choking the power cord with a ferrite core:
My assumption is that whatever noise/coloration/etc. the power supply
is going to be adding to music
I'm not sure that noise is the only criterion for choosing between power
supplies. For example, I have been told that a battery will give dead
silent background, but the dynamics in playing music will be different
from an AC-powered supply. Some may prefer the silence, but others may
think the
jonheal Wrote:
Also, if you happen the get the White Noise of Death during the
experiment, it'll probably kill you on the spot ;-)
ROTFLMAO
Actually, this test sounds perfectly logical to me. I have a Benchmark
DAC1 on order, with headphone outs, so can eliminate the cheap preamp
part
seanadams Wrote:
Good point - USB audio is designed for real-time as opposed to reliable
transmission. I.e. great for gaming or normal pc audio needs, but not
hi-fi.
WRT to the rest of the article - nice! An excellent random stream of
consciousness ranging from how to probe a die using a
CardinalFang Wrote:
But how do you tell where the noise is coming from? Amplifer noise could
be swamping any SB noise.
Paul
I'm not an electrical engineer, but I know enough to know that noise is
additive (not counting things like out-of-phase stuff cancelling itself
out). If there's more
GaryB Wrote:
So my cover is blown - I am the same Gary from the Diomods board.
And one final comment about digital output jacks - I think 75 ohm BNC
jacks are the only way to go. They are cheap and their performance
will be better than the best WBT RCA jack. You can buy very good
P Floding Wrote:
OK, thanks for the info!
I wasn't aware of the On-The-Go stuff.
I wasn't either till i searched, so thanks for asking.
Also gotta mention I still think it's easier to use SB for now, as
implementations of USB audio seem questionable at best in this stage of
the game.
jonheal Wrote:
Since I'm not an electrical engineer, may logic may be flawed, but
here's my proposition as it concerns switching vs. linear power
supplies, and also choking the power cord with a ferrite core:
My assumption is that whatever noise/coloration/etc. the power supply
is going
P Floding Wrote:
I agree.
And, anyway, if anyone is planning to build a properly designed D/A
that pulls its data from a computer one might as well start with an SB
and modify it.
Don't agree. Otherwise it's an unnecessary intermediary that precludes
upsampling.
P Floding Wrote:
I did
P Floding Wrote:
I'm afraid only common sense doesn't really work when it comes to
engineering.
I'm afraid the scientific field fails to explain the hi-fi phenomenon
in general though. Otherwise we'd all be using zip cords of the proper
guage for speaker wire...
--
Skunk
Skunk Wrote:
Is the load presented to the power supply not affected by musical peaks?
Surely not as much as in power amps, but I'm *guessing* listening to
silence would be inconclusive.
My experiment focuses on only one characteristic -- audible noise.
Power supplies may have other
jonheal Wrote:
My experiment focuses on only one characteristic -- audible noise. Power
supplies may have other characteristics that make one more suited to
powering audio components over another. But if your goal is to simply
inject as little noise into the chain as possible, this
mamsterla Wrote:
A couple of quick questions:
1. Does it make sense to alter/remove anything else from the SB2 for
its duties as a digital transport?
2. Where did you source your Scientific Conversions transformers?
3. What mode of the ArtDIO do you like best - 88.2/44.1/ext?
1. No, I
Hi Jon,
You're describing a blackness test. A very valid test, but one of
many that may be used to decide which PS is better than another. I'm
not an EE either, but the gist of the linear PS preference is that the
switching supply introduces distortion while playing.
So the switching PS could
Skunk Wrote:
Does that translate even indirectly to what people with too much time on
their hands describe as 'inky black backgrounds'? I hope you know I'm
partially kidding Jon!
Well, I'm gullible enough that I will go along with just about whatever
escoteric mod the Intelligentsia says
I tend to think white noise is not really the issue. If it increases
linearly with volume and has a uniform frequency distribution (and does
not vary with frequency), then our brain will subtract it out for the
most part. Now, if higher frequencies induce greater levels of noise,
or vice-versa,
Jetlag Wrote:
That is the PSU that I am using.
I'm really having a difficult time finding an enclosure. The only one
I found thus far is from RatShack and it is plastic.
Any ideas?
Hey Jetlag,
Have you boxed your PS yet? I just received an aluminum box (2
actually) from parts express
I think a lot of people have missed the fact (revealed in other threads
by the CTO of slimdevices) that the power for the analog stages in the
squeezebox comes from the HV switching converter on the display board.
You can mess around with linear regulated supplies and ferrite beads
external to
I have been absolutley swamped, to many irons in the fire as it were.
Yes, I boxed it in a plain aluminum box I found cheap at a local used
electronics place and it is working great. I will post more when I
have time, just to busy at the moment.
--
Jetlag
Skunk Wrote:
Don't agree. Otherwise it's an unnecessary intermediary that precludes
upsampling.
Me too. The pitfalls of isynch transfer were but one of the hurdles
overcome by the bb engineers. I'm glad we got to talk about it for a
minute before someone jumped in here, but I'd love
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