rk, and even nonlinearity doesn't naively help. This
project of mine is basically stalled because of that. So, please help me
1) latch on right for occasional acquisition without synchroneity or
metadata, 2) do low computational complexity and high
statistical homogeneity serial random
best type of signal
after filtering that you could find, through gradient descent of the
dithering or whatever else.
Gradient descent towards which penalty function, over what?
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
mewhat counter
to the intention of a *hidden* channel, since you could achieve much the
same by just passing the extra information in a scrambled for in the low
order bits, and going with TPDF for the utility signal higher up.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+
possible to
later on unprocess from the signal even coding faults which would be of
no significance in usual audio work.
Seriously, I've thought about this stuff for quite a while now, and
would like ideas. (Some of which I've already gotten; thank ya'll!)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
a codec. I'm trying to subtractively dither arbitrary
signals, so that we don't have to add noise to the utility signal.
Coding theoretically, I'm then trying to spread out the synchronization
signal that I need, as far as possible, and to derive it from the
entropy in the signal itsel
aybe even with
SBM-style noise shaping, and whatnot. But then -- mostly regardless of
what you dithered with, if the amplitude is great enough -- once you do
coherent subtraction, you're left with a measurement grade background.
Which is what I aim at. For reasons. Just not quite there yet.
r for signal enhancement?
No enhancement. Just a self-synchronizing trigger for subtractive
dither. So that I could come up with high grade and easy to implement
subtractive dither, for general PCM circuits.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E
ively dithered ones.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
the recording amenable to
further processing, without noise accumulation. Nothing lost, some
gained.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
ourse. But that floor is a whole 6dB lower for subtractive
dither, as opposed to additive RPDF, and evenmore for the typical TPDF
additive signal.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
On 2021-11-20, Zhiguang Zhang wrote:
from what i've been taught, the function of dither is to decorrelate noise from
the signal.
Dither decorrelates quantization error from the utility signal. Not
noise.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-37
e ultimate limit.)
You're no worse off with the additive dither than you would be
otherwise.
But you are.
The dither generated this way is still useful dither.
There you are right. But it isn't optimal, like subtractive is. ;)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy
I'm after is a very simple means of doing subtractive dither.
Something which could be placed at every incoming and outgoing A/D/C and
computational algorithm, at negligible cost. So that it might become a
standard, yielding some 6dB's worth of extra range *everywhere*.
It's po
e who can afford the helium pumps, usually only do 1-3 bits, really
*really* fast. In millimeterwave radioastronomy, not in acoustics.
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
n)
This on the other hand I don't. Which is weird, because as a
Gerzon-ambisonics freak I ought to.
Might you not give a reference to the paper? ;)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
the experiment—too many other things on the list. :-D
Thus, each of us will probably just carry on. It's not as though I'd be
able to even commecialise thise stuff. :)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
lacrum of linearity this stuff is).
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
Them idjits, some of which already
have their frozen heads tanked in liquid nitrogen. As though it could
ever last... :D --
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
otocol for all digitized analogue signals.
Brazen, I know, but why if not? ;)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
so. As
such, I'm the numerical kind of guy, almost from birth. When I bumped
into the idea of coherent decoding versus decoherent, it was almost
weird to see anything decoded absent coherence.)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
earchgate.net/profile/Malcolm-Hawksford-2/publication/321705393_A_Compilation_of_Technical_Papers_on_Stereo_and_Spatial_Audio/links/5a2be8af0f7e9b63e53abd4f/A-Compilation-of-Technical-Papers-on-Stereo-and-Spatial-Audio.pdf
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40
they claim.
Take a look at Acoustic Reneissance for Audio papers. (I seem to
remember Stuart and Craven might have had their hand in, there.) They
make the case that something like 26kHz sampling and 14 bits, with noise
shaping, covers the whole auditory band. Even for them yoot.
--
Sampo Syre
ons to their premises, there are also various
objections to the business model they've now led to. My pirate friends
consider the whole enterprise to be an attempted IP coup, of the like of
Sony's SACD/DSD, right at the time of CD patents expiry. The stuff
sounds like snakeoil and all-round b
On 2022-01-30, Sampo Syreeni wrote:
There's at least one paper somewhere which systematically tested how
binaural (then called dichotic) localisation accuracy depended on the
bandwidth (and so inverse time localisation) of brief pulses. In it,
it was shown that localisation accuracy decr
rs, and AES Fellows), sells to my eye, sheer
snakeoil. Stuff that just doesn't stand upto a priori scrutiny. What
*fuck* went through their heads, because they of *all* people ought to
know better?!?
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
//en.wikipedia.org/wiki/Invariant_subspace_problem
I enjoyed this story a great deal, reminds me of my undergrad intern
days :P
If you don't mind me asking, what was your area of expertise, and where
do you move now?
Here, long term unemployed. ;)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
time time-frequency decompositions such as wavelets
and Gabor transforms, can in fact yield lots of geometrically invariant
structure. It is just obscured in the DSP framework, where we have a
running time dimension, where There Can Be Only One.)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
On 2022-04-26, Joseph Melotte wrote:
What means here Haptic .. ?
To have to do with touch. Often with haptic feedback, so as to do with
servo loops where your device vibrates or kicks your finger back a
little bit. "It feels like it's there."
--
Sampo Syreeni, aka decoy
, musical,
servo loop. (And in fact we do all of it much more readily using all of
the sensory modailities, at the same time.)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-40-3751464, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
rom arbitrary point clouds to regularized,
isotropic, optimized, ambisonic -> binaural mappings?
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIBAg&c=009klHSCxuh5AI1vNQzSO0KGjl4nbi2Q0M1QLJX9BeE&r=0KP05IfooxNI4bMGut-bPu
ic, psychoacoustically
viable means of reducing high anisotropic wideband measurements to a
lower order isotropic representation of a soundfield over a human head.
Which is what I started this thread about.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=
h DC. Also do this gently, because as you
apodize/window either of time response or the reciprodical frequency
one, you'd be apt to introduce irregularities and oscillations on the
other side.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__dec
on
DSP, you'd actually probably like to talk about numerically induced
noise, drift, and the stability problems they cause.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIDaQ&c=009klHSCxuh5AI1vNQzSO0KGjl4nbi2Q
-delay convolution algorithm.
What you'd get is a purely linear zero-delay algorithm, able to dealing
with time-variance. Able to be parallelized via usual MPI and whatnot.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&
ory of
translation invariant linear spaces. It's just beautiful, and would
answer these kinds of questions better than I ever can.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIDbA&c=009klH
nd. Some others might also have a lot to talk about
the aesthetic side of music/audio DSP; the history; whatnot. Perhaps it
might be beneficial to the list and even the wider audio processing/DSP
community to start a (never-ending) thread of posts on this stuff,
eventually covering it all? Surely the newbie
x27;re wrong. Because if I continuously advance a sinusoid's
phase, eventually it'll reach inverse phase. That's just the nature of
shift-invariant spaces and their Fourier bases. It's kind of a weird
symmetry, but it necessarily exists, and then, There Can Be Only One. ;)
--
S
hear the beating, as opposed to a regular short beat additional
or divisional polyrhythm, they'll go "ah!", and then off to do something
much more useful. Seriously, this shit is pedagogic/didactic, even if
it's only about "art".
--
Sampo Syreeni, aka decoy
On 2023-01-05, Earl Vickers wrote:
Very nice writing, thanks!
Thanks, but actually I've done much better when I was sober.
Some twenty years ago or so.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d
tial Audio, Voice
Isolation, Headphone Accommodations, and Apple Music Sing.
No disrespect, but if you're such a highly regarded Apple fiend, why do
you hail from a gmail address, in all caps? It's kind of jarring.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoin
On 2023-01-12, STEFFAN DIEDRICHSEN wrote:
Your email address also has capital letters.
No, it does not. It never had.
And I, who’s working at Apple, too, use a private email address for
this mailing list as well.
I've never worked at Apple. Come, now.
--
Sampo Syreeni, aka decoy
al. Applied all over the sphere, as
ambisonic quadrature does. Whew, the possibility of doing low weight
superresolution *is* there.
Yet I don't think that will be done by people who spell out their Apple
addresses in all caps.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefens
uarantee in the IEEE
standard between hardware and software. Sure, it *says* there is, and it
goes into great intuitive detail in it. But in practice, there isn't a
*shred* of proof those intuitive ideas actually work. Which they then
really don't.
--
Sampo Syreeni, aka decoy - de...@
ied the architecture down from denormals, DnD's,
infinitudes, asynchronous exceptions, and the like.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIBAg&c=009klHSCxuh5AI1vNQzSO0KGjl4nbi2Q0M1QLJX9BeE&
nd, which only local astronomical
simulations really require; only distant ones really then require the
exponent. At all.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIBAg&c=009klHSCxuh5AI1vN
GW-64).
So it is. From Eric de Castro Lopo. He's also made it a point of making
his library easy to use, and for it to separate concerns. Nice work, say
I as well!
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIBAg&
denorms and have to set the FTZ and DAZ bits to avoid denorm
exceptions There should be no denorm exceptions anymore.
Agreed. Denorms might sometimes be wanted, but the way they're reported
is one piece of shit. Also makes it difficult to push sil
e of even a 32-bit
float, because 1) going lower than 1-bit would be unhearable, and 2)
going to the full 24 bits would literally split your ears. Then between
those wide limits, you have full linearity, which helps you produce
better and more stable algorithms.
--
Sampo Syreeni, aka
h
nonlinear and sluggish in its parametrization. But then those qualities
give it its signature tone and value on the market. Its "imperfections"
really made it the brand it became. Why not strive for something
of similar character, instead of trying to iron out theoretical
disagree
in.
What I'd like to know from the original poster, is, what is the precise
problem se'd like to solve using the z-transform, and why is it needed
here.
--
Sampo Syreeni, aka decoy - de...@iki.fi, https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&a
unlike how we deal with linear wave phenomena such as sound,
and how linearly we as people tend to perceive them.
(And sorry, I might be responding to myself. If so, you ought to be
chevroning my post as well...well. Top-posting in particular is
difficult to a
other
way will land with you with a truly stable and trustworthy algorithm.
If need be, and if you *really* want me to do so, I can build you an
example of what I'm talking about. It'd take its time. But I sorta
think, as a known better o
52 matches
Mail list logo
