ke sure you can play 96 KHz and hear it on the analog
outputs. When you unplug the loop cable it should go silent.
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Vi
ed. It is simply gone, and boosting the level or using a
higher res ADC isn't going to bring it back.
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d any offset you pick is completely arbitrary and has nothing to
do with amplitude.
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tain the same effective dynamic range
(at the low frequencies of interest), while gaining better conversion
accuracy (higher SNR, lower distortion).
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ally about the same since SNR
will be the limiting factor on a 24 bit DAC.
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correlated jitter
in a machester receiver was incorrectly applied to ethernet streaming.
Obviously for Touch there is no s/pdif input so they would have been
playing files over the network, which uses its local (only)
n
obscenely low noise floor and it is not realistic to expect that
performance from a $300 device employing a single-chip, single rail DAC
+ output stage.
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t and
see if the DAC works.
I have never heard of this problem before so I'm just giving you some
things to try. Where to go next depends on what you find.
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o which are you referring? The Unifive
ones were barely FCC compliant, but the Logitech branded ones were
vastly quieter.
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sure why it should be better with
either curve in particular.
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ng to AKM about this years ago but I just can't
remember what the deal was exactly. Certainly if they had told me slow
filter is awesome I would have used it.
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en't proper RF connectors either, but BNCs
certainly are, and in either case the correct type of _cable_ is used,
and that is critical. RCAs connectors aren't _that_ bad anyway - we
manage to run high def co
your momo;562730 Wrote:
>
> Currently I made very good experience with the BNC out, but I could not
> hear clear difference between AES or S/PDIF data format.
There isn't supposed to be.
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--
defective specification and its only practical use is to take advantage
of microphone cables you might have lying around the studio, which are
terrible for this purpose.
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27;s quite silly that they are even different data formats in the first
place. They just rearranged a few bits in the data structure.
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V
on for the transformers. It is a rough estimate based on the
voltage seen on the secondary side.
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hed. As such I would think
that you're best off letting it do all the resampling in one pass.
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Phil is correct. The grounded plug is for safety, as required for UL
compliance. It ensures that an internal wiring fault could not cause the
metal case to be "hot" (or cause damage to connected equipment).
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at the
test itself is bogus.
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___
michael123;516473 Wrote:
> for example, one that does not show me 'overvoltage protection' every
> two weeks
see comments in other thread.
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I will add some notes because the
failsafe behavior is excessively touchy and should not be triggered by a
single spurious reading the way it does now.
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ively driven to 0) rather than
floating.
This was different with SB3, where shutting off the DAC was necessary
to reduce the >20KHz noise floor below a level where it would trigger
some amps.
I do not think any difference in component wear should be a practical
consideration.
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s
Phil Leigh;514160 Wrote:
> I'd call a -144dB null "no difference" :-)
>
Yep, me too. Just pointing out where there is still wiggle room for
people to claim they can hear stuff at that level (of course, while
refusing to
erate design efforts rather than
evidence against the existence of microphonics in general. ;)
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e
shaping".
I guess you do have to know what to listen for. Most people probably
focus on the tone and timbre in the foreground which is where mp3 has
the least difficulty.
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ink we should start scoring the trolls. This post lacks originality
- you were doing better earlier with the bath tub business.
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mand"?
> Because this would imply you're doing it in packets and sudden movements
> in an electronic circuit can produce jitter.
It's called "TCP". Now, do you have testable claims or do y
satellite
and isochronous USB for example).
In SB/TP, the outgoing data is clocked directly by a fixed crystal. The
incoming data is "pulled" on demand. There is no feedback from the
buffer fullness to the clock ra
the cables it can be demodulated by a downstream amplifier,
and that has happened before.
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s nonsense. It's all buffered and error corrected, and it can
easily be shown to be digitally correct in either case.
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Vi
johnM;510330 Wrote:
>
> I haven't even checked my Transporter to see which kind of connector
> they use, hopefully the 75 ohm type.
Yes they are 75Ω
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that's all
there is to it.
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_
sors
work properly in "synchronous loop" mode. I know that behringer DEQs do,
but Tact DRCs do not (due to ASRC). It would be a good subject for a
wiki page.
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Valentino;510033 Wrote:
> Thanks for replying, seanadams.
> The basis is that I would like to syncronize the receiving end of the
> effect loop to word clock in instead of the clock embedded in the spdif
> signal as I do believe that it will reduce jitter in the system.
>
It
Can you explain in more detail what you want to accomplish? I don't
think word clock has been tested in this context, but it's not clear to
me that what you're doing is a valid application for it either.
Ethernet is transformer isolated and will not make ground loops. Unless
you use shielded cable, which is a dumb thing to do.
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This is next on my list of post-apocalyptic skills to master by 2012.
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external
circuitry - a key selling point for a DAC is not just the price of the
chip but the total system cost. Since that was just not a limiting
factor, I goosed it quite a bit further from the reference design by
upgrading passives, using super regulators and good clocks. No big
secrets
Besides the power issue - does that unit even support simultaneous
microphone level on one input and line level on the other?
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View
ion measurements it may be a
problem.
Can you use the RCA outs instead?
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gsawdy;503243 Wrote:
> Can the wireless card and antennas be removed from the Transporter? Is
> there a link to the how-to-do-that info?
>
> TIA, George
It's easy but there's really no reason to. When you're on ethernet it
is totall
.4GHz into the audible band, then you can hear it. This,
among other reasons is why you should use ethernet if it's available.
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Vie
See this thread about analog vs digital inputs on an A/V receiver:
http://forums.slimdevices.com/showthread.php?t=14599&highlight=denon
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but the transformer has the advantage that
it isolates the grounds between the two devices.
In terms of signal quality the differences are not going to be huge -
try them both.
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the heck out of everyone which makes it
easy to sell any kind of "cure".
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tad limited!
Not that I know of... and in fairness, Transporter has a word clock
output mode which only does 44.1, but as far as I know nobody has EVER
used it for anything except my own performance testing.
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f you just begin to think about this for one minute, instead of
blindly accepting the dogma of an overpriced audiophile snake oil
vendor, you might begin understand where I'm coming from.
Sometimes I wonder why I still vis
It's an optional mode where an external DAC may serve as the master
clock.
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27;m at a loss why Logitech Transporter/dac/clock combination should be
> any different.
You fail to understand the most basic principles of DAC clocking. Maybe
DCS does too - or maybe they do get it, but they'd rather sell you an
overpric
from word clock
connections should never be used to actually drive a DAC.
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http://forums.slimdevices.com/showthread.php?t=71262
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new.flac filename.flac
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__
the best workaround is to use flac to re-encode that one track. It'll
probably work with the default settings.
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-compressing the file using the default FLAC settings, and
if that doesn't work try turning the compression level down a notch.
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time on this but it was an interesting way to see the
total performance difference between the various media.
If anyone actually has a high-end scope and would like to try these
sort of tests I could provide more guidance on how to do it. I think
it's a shame that everyone seems content to
ight not be your AC power - I suspect a firmware bug that
can cause a very rare, spurious false positive.
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s about the high voltage.
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___
t sure what you're suggesting that
is different than what these products do. When you say transport do you
mean a CD player or what?
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Kellen;485819 Wrote:
> All this talk about transmission problems with S/PDIF and USB . can
> the Ethernet protocol (TCP/IP) not be used for the transmission of these
> digital files in place of the current problematic ones?
I think there are products that do that....
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nd a bug in SqueezeCenter where it is not properly
reinitializing the player when it connects.
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e than that depending on how
far apart the clocks are.
By the way asynchronous (external is master) is always going to work.
Synchronous is an optimization for jitter that only _might_ work.
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he firmware is doing the right thing and ignoring this
setting, but to be on the safe side it should be off unless you intend
to use it.
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Vie
through the
external processor.
I haven't tested it but I suspect the Behringer DEQ2496 might be
suitable for this mode.
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nd a properly designed and tested output circuit... you'll
be happy.
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rt, but
then again I suspect neither are the guys who manufacture plastic
toslink adaptors...
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one reason or another (got the cable handy, used
up all the other inputs, etc) but I don't recommend it.
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AES/EBU is a defective technology, use coax S/PDIF instead.
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27;m not sure why you would ever want
one and not the other.
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rconnecting cables but (for high
speed signals) even at the board and die level.
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rtainly anything with a coil of wire in it...
A simple transducer isn't anything per se. It's not until you discuss a
transmission scheme - how it's connected to something, whether one side
is ground and how it is seen by an input, that you can describe the
system as b
aring 60Hz hum,
ground loops can put other crud in your noise floor that would be
eliminated if you use balanced.
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Pneumonic;483413 Wrote:
> Sean, if I may ask. While studying the various DAC chipsets prior to
> deciding on the 4396, did you find that most of the serious contenders
> outputted a balanced signal?
>
I have never seen a high end (120+ dB) DAC with single ended output.
-
f its uptime has been reset (i.e. it crashed and rebooted).
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as far as this subject is concerned - all
electrical signals are analog. For example Ethernet, DVI, Firewire, USB,
and SATA all use balanced signaling too. RS485 is balanced which lets
it go much greater distances than RS232, and the list goes on. The
farther and/or faster you need to go,
wice the circuitry" is somehow bad - you're missing the
point of balanced signaling. It's TWO complementary paths, but neither
one is more complicated than its single-ended alternative, and having
two complementary paths is what gives you the common
expect. Then if you want to do a
better A/B test, you can offset by that much.
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That is too bad. I wish I could be of further help.
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Sorry but I can not imagine any reason for this not to work!
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ectly.
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___
audiophil
maybe it's using a surround encoding? Any option in "system preferences
-> sound" to change it to PCM?
Other than that, maybe try playing it into an AV receiver and
confirming that it works and comes up as PC
ector), then it's bad. You might even convince Slim to send you just
the module and save everyone on shipping.
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(the default). But that's only supposed to come into play when TP is
being used as a DAC.
Unfortunately, I think you will probably need to send it in for a main
board replacement.
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What makes you think it's the PSU? If the CPU doesn't boot for _any_
reason, you will get the same behavior. I would recommend sending it in.
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or anything you could
infer from the Tact specs alone.
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x27;t think that's true... the Tact passes everything through ASRC
processing even if the sample rates are nominally matched. I remember
testing this when developing the TP effects loop feature - you always
have to let the Tact become the m
n on a new unit.
Actually, given the way the bathtub curve works, a well-burned-in
Transporter that still passes factory testing is statistically _less_
likely to fail.
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y low noise floor or c) stepped attenuation using
quality metal film resistors. In roughly that order of preference,
using a few dB of digital attenuation in the TP as needed.
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her a higher Z output (Z means impedance) is a significant problem
depends on what you're feeding. If it's going a short distance straight
into an op-amp buffer then you're probably fine. But if it's got some
capacitance or noise nearby, then you may have a problem.
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-
h types of
cabling to different inputs, try it out, and choose whichever you
prefer.
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Vie
ilar to the chip in
Transporter - although it lacks the Jung power supplies and low-jitter
clocking which will give TP a distinct advantage. If you want to do a
serious test it would be necessary to match levels using a voltmeter on
the pre-outs.
--
ntly more susceptible to this sort of
thing.
A few things you could try:
Are you using the wii's 802.11? Use ethernet if possible.
Connect the wii with optical s/pdif if available.
Clamp ferrite cores around the wii's cables. Try them near either
amcluesent;439601 Wrote:
>
> But I feel that this isn't so good due to impedance mismatches.
>
Nonsense. Line-out RCA connections are not even impedance matched in
the first place. It's perfectly OK to use a splitter for th
d that the impedance of the
trigger input is high enough that it doesn't get loaded down too much.
If that doesn't work, use a 50mA PTC (resettable fuse) instead.
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timequest;427581 Wrote:
> I really want to see if I can mod the Duet receiver with an I2S output.
> Is that doable?
Not much you need to mod, the signals are there.
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s they would make a fine pairing.
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___
nd correct handling
of raw PCM, so his statement is quite disingenuous in extrapolating that
observation to current models, or "the SB clocks" in general.
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ling should not be overlooked.
> As long as you don't starve the unit by not feeding it data, or the
> opposite problem of feeding it too much data, jitter on the input data
> shouldn't be a problem.
I'm not sure what you're ge
ut overdriving the amp's inputs (in this case).
I don't know how to make it more complicated. :)
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rs. As for your speakers, you
need some experience and common sense to be able to hear if you're
pushing them too hard. They have a wattage rating but again this is for
some test signal, probably pink noise, and is only an approximate guide.
For real music you just don't know its power
, then it means you should instead be
using -20dB analog attenuation.
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