pfarrell;315144 Wrote:
> Pale Blue Ego wrote:
> > This is all true, but we're talking about computer components here,
> and
> > therefore it makes sense that future generations of SB will get a
> faster
> > CPU and bigger buffer whether it wants them or not.
>
> Embedded stuff starts out a lot m
Pale Blue Ego wrote:
> This is all true, but we're talking about computer components here, and
> therefore it makes sense that future generations of SB will get a faster
> CPU and bigger buffer whether it wants them or not.
Embedded stuff starts out a lot more competitive. An $8 CPU is
expensive,
pfarrell;314887 Wrote:
> Pale Blue Ego wrote:
> > Isn't the
> > current SB3/SBR limitation only due to CPU or buffer memory limits?
>
> perhaps both, Sean said CPU cycles aren't there. faster/wider takes
> more
> memory and cpu even if the DAC can handle it. Given the tremendous
> pressure on
read this:
http://www.wolfsonmicro.com/uploads/documents/ADC_Paper_v1.1.pdf
Clive's point is correct about ADC's running (internally) at high
sampling rates. Prior to the modern ADC chip, an analogue filter is
always used to roll-off extreme high frequencies. This is benign
because it is simple
cliveb wrote:
> Nobody uses analogue filters at 22.05kHz during A/D these days.
Because all those brickwall filters were evil, EVIL.
They completely screwed up the phase down into 10kHz. Maybe way lower.
Too evil to think about using.
--
Pat Farrell
http://www.pfarrell.com/
___
Rodney_Gold;314908 Wrote:
> Well , to my knowledge it has to be a brickwall filter at 22.5khz , I
> cant see how it can be benign
Nobody uses analogue filters at 22.05kHz during A/D these days. All
ADCs sample at quite high rates precisely so the anti-aliasing filter
can run at high frequencies,
Well , to my knowledge it has to be a brickwall filter at 22.5khz , I
cant see how it can be benign , it surely has to affect frequencies in
the audible spectrum to some extent as per
ccrma.stanford.edu/courses/192a/Sampling.pdf
Anti-Alias Filters:
In order to prevent aliasing, we must remove
Rodney_Gold;314884 Wrote:
> Surely there is also a filter implemented in the AD processor , to cut
> any frequencys above 1/2 the sampling rate?
yes but as this is a (relatively benign) high-order analogue filter
that is merely removing high frequencies prior to the ADC itself, it
isn't going to
Pale Blue Ego wrote:
> Isn't the
> current SB3/SBR limitation only due to CPU or buffer memory limits?
perhaps both, Sean said CPU cycles aren't there. faster/wider takes more
memory and cpu even if the DAC can handle it. Given the tremendous
pressure on keeping prices down, its not at all clear
Surely there is also a filter implemented in the AD processor , to cut
any frequencys above 1/2 the sampling rate?
--
Rodney_Gold
Sb3/Z-sys RDP1/meridian DSP5500's
TP/X-cans v3/Senns 650's
TP/TACT 2.0/SCM 50a's
TP/Meridian DSP5000's
"The nicest thing about smacking your head against the wall i
adamslim;314776 Wrote:
> I think it's highly unlikely that it will ever support 24/96. SD
> designed the TP for audiophiles who wanted that kind of thing - I can't
> even see why they would want to put into their cheapest product.
Because most audio chips already handle 24/96, there's no reason
Rodney_Gold;314859 Wrote:
> I was under the impression that High sample rate recording is not to
> preserve inaudible sonics , its so that anti aliasing filters are much
> higher up in the freq scale and thus dont impact or lessen the impact
> at audible frequencies?
if you are talking about the
I was under the impression that High sample rate recording is not to
preserve inaudible sonics , its so that anti aliasing filters are much
higher up in the freq scale and thus dont impact or lessen the impact
at audible frequencies?
--
Rodney_Gold
Sb3/Z-sys RDP1/meridian DSP5500's
TP/X-cans v
pfarrell;314840 Wrote:
> Phil Leigh wrote:
> > There is little to be recorded at 20khz never mind 24... in the past
> > very very few tape machines (or tapes) could get flat past
> 22khz...and
> > the mics were rolling off there as well. Modern mics and digital
> > recorders can go much higher...
Phil Leigh wrote:
> There is little to be recorded at 20khz never mind 24... in the past
> very very few tape machines (or tapes) could get flat past 22khz...and
> the mics were rolling off there as well. Modern mics and digital
> recorders can go much higher...
I'm not sure what you mean by "mode
cliveb;314821 Wrote:
> My point wasn't whether stuff up above 20kHz is audible. Rather it is
> that if you downsample without pre-filtering, then anything that was
> present in the original at a frequency above the Nyquist rate for the
> new sample rate will be aliased down into the audible range
Phil Leigh;314785 Wrote:
> Modern mics and digital recorders can go much higher...but there's just
> harmonics from cymbals, brass and stuff up there...and we won't hear it
> anyway.
>
> 48/24 sounds great on the Linn masters. To me they sound no different
> to the 88.2 version.
My point wasn't
cliveb;314781 Wrote:
> Others have already pointed out the various limitations in sample rate
> support on the SBR.
>
> But the subtext of the original post is rather more interesting. What's
> being said here is that a system with dCS gear (ie. state of the art)
> does NOT expose the fact that
tobyjug;314736 Wrote:
> Does anyone know if Logitech will be releasing a receiver with up to
> 96khz on the digital output. I have some Linn files that are 24/96 and
> the SB3 is downsampling them to 24/48 which going through the dCS
> Purcell (upsampling to 192) and Delius sound extreamly good.
tobyjug;314736 Wrote:
> I know the transporter outputs at 96 but it would be a waste of money
> when I have the dCS kit any I haven't got any where near that kind of
> money.
Wow - the TP is too expensive compared to your dCS kit? You steal it?
;)
The Receiver is very similar to the SB3; I thi
tobyjug;314736 Wrote:
> Does anyone know if Logitech will be releasing a receiver with up to
> 96khz on the digital output.
Nothing's been announced, and Logitech have a policy of not talking
about future products.
--
radish
Does anyone know if Logitech will be releasing a receiver with up to
96khz on the digital output. I have some Linn files that are 24/96 and
the SB3 is downsampling them to 24/48 which going through the dCS
Purcell (upsampling to 192) and Delius sound extreamly good. Very
detailed, warm and very li
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