yes i wholeheartedly agree. ripple/ringing/Gibbs is part of the definition
of bandlimited filtering, from the LPF to the ADC/DAC to even contributing
to the sound of the piece of gear
On Wed, Jun 24, 2020 at 5:03 PM Greg Maxwell wrote:
> On Wed, Jun 24, 2020 at 8:56 PM Zhiguang Zhang
> wrote:
it was Alan Wolfe's thread?
i don't want to argue and/or discuss the intricacies of sampling theory,
but this is the DSP forum, no? isn't this a place to discuss such
technical things? even a plug-in? i'm rather confused lol
On Wed, Jun 24, 2020 at 5:00 PM robert bristow-johnson <
hi Greg,
yes but taking circuit depth to mean circuit path and assumptively related
to window size, a smaller window almost certainly equals more ripple
distortion
-ez
On Wed, Jun 24, 2020 at 3:57 PM Greg Maxwell wrote:
> On Wed, Jun 24, 2020 at 7:46 PM Russell Wedelich
> wrote:
>
>>
in these
graphs, the Blackman has a *passband ripple* of only about 0.02%, while the
Hamming is typically 0.2%. In general, the Blackman should be your first
choice; a slow roll-off is easier to handle than poor stopband attenuation.
On Wed, Jun 24, 2020 at 12:17 PM Zhiguang Eric Zhang wrote
e sampling from an analog source, but in
software, it just depends on your windowing
On Wed, Jun 24, 2020 at 11:47 AM Zhiguang Eric Zhang wrote:
> here:
>
> https://community.sw.siemens.com/s/article/the-gibbs-phenomenon
>
> "*The Gibbs Phenomenon*
>
> [image: User-a
. Anyway, I digress...
>
> On Wed., Jun. 24, 2020, 1:06 p.m. Zhiguang Eric Zhang,
> wrote:
>
>> It's not just about zero-padding. Say you could sample the signal and
>> window at, say, fs, but why the hell would you want to window at fs? At
>> any rate, if you look at t
It's not just about zero-padding. Say you could sample the signal and
window at, say, fs, but why the hell would you want to window at fs? At
any rate, if you look at the Hamming window, the ringing artifact is rather
negligible.
On Wed, Jun 24, 2020, 11:15 AM STEFFAN DIEDRICHSEN
wrote:
>
a19j0pocTY0nlPoVxogY9T9_uOAxrAQ=5g05rZmCxxm7mFWzjsmtibiAFhpNr6ZMNi72oy2iEf0=>
> ?
>
>
>
> On Wed, Jun 24, 2020 at 12:13 PM Zhiguang Eric Zhang
> wrote:
>
>> Thank you. Yes it seems very theoretical and math heavy. In practice
>> you will get this frequency response artifact
/v2/url?u=https-3A__jontalle.web.engr.illinois.edu_uploads_537_Papers_Public_AllenRabiner77-2DProcIEEE.pdf=DwMFaQ=slrrB7dE8n7gBJbeO0g-IQ=w_CiiFx8eb9uUtrPcg7_DA=EIWxvlh8qpdcU_coPNdiZxhQaqJEihTl-BcA8WN1eWw=e-NKtVrjHEINB5kEwTE3d4g9q2bZGxjnso8yyBhaUUM=>
>
>
> On Wed, Jun 24, 2020 at 11:56 AM Zhiguang Eric Zhang
> wrote:
>
>> unfortun
with the FFT, of COLA windows are used. See
> equation 5.2.5 in that paper, and the analysis that precedes it.
>
>
>
>
>
> On Wed, Jun 24, 2020 at 11:16 AM Zhiguang Eric Zhang
> wrote:
>
>> that's not true. with FFT/COLA you will necessarily have the Gibbs
>
ltering.
>
>
> On Wed, Jun 24, 2020 at 10:59 AM Zhiguang Eric Zhang
> wrote:
>
>> ripple is just a known artifactual component of a windowing operation.
>> it's also known as the Gibbs phenomenon
>>
>> http://matlab.izmiran.ru
statement?
>
> On Wed, Jun 24, 2020 at 10:02 AM Zhiguang Eric Zhang
> wrote:
>
>> yes but any windowing operation is akin to taking a dirac delta function
>> on X number of samples and thus you will get ringing/ripple artifacts as a
>> necessary part of the filter re
yes but any windowing operation is akin to taking a dirac delta function on
X number of samples and thus you will get ringing/ripple artifacts as a
necessary part of the filter response
On Wed, Jun 24, 2020 at 6:30 AM Corey K wrote:
>
> of course it won't have the ripple artifacts associated
hi again,
just wanted to chime in that this piece of software was released some time
ago and is the traditional FIR/IIR equivalent of what's being discussed
here, and is quite a breeze to use in the studio
https://www.wavesfactory.com/trackspacer/
of course it won't have the ripple artifacts
Hi Ethan,
It's been a few years since I've ran or heard this FFT filterbank EQ. I do
remember it being quite clean, indeed, I chose to work on it precisely
because I realized that it could be designed to be zero-phase (meaning no
phase distortion like you get from traditional FIR/IIR eqs).
The
it is not causal because the zero-phase system does not depend on past
samples
On Sun, Mar 8, 2020 at 1:58 PM Zhiguang Eric Zhang wrote:
> the frequency response is a function of the windowing function
>
> On Sun, Mar 8, 2020 at 10:34 AM robert bristow-johnson <
> r...@audio
t;
> r b-j r...@audioimagination.com
>
> "Imagination is more important than knowledge."
>
>
> >
> > > On Mar 7, 2020, at 7:42 PM, Zhiguang Eric Zhang
> wrote:
> > >
> > > Not to threadjack from Alan Wolfe, but the FFT EQ was
eds the time of one frame,
> then the process cannot be real time. but if the time required to do all
> of that (including the overhead of interrupt I/O-ing the samples in/out of
> the blocks) is less than that of a frame, the process is or can be made
> into a real-time proc
Sorry I meant Alan :)
On Wed, Jan 15, 2020, 11:20 PM Alan Wolfe wrote:
> probably pretty basic stuff for most people here but wanted to share a
> writeup and demo i made about FIRs.
>
> Post: https://blog.demofox.org/2020/01/14/fir-audio-data-filters/
>
This is a very cool blog, I need to spend some time with it. It's also
interesting to draw parallels between the graphics stuff that Alex writes
about to the audio realm.
Traditional FIR/IIR filtering is ubiquitous but actually does suffer from
drawbacks such as phase distortion and the inherent
sorry, meant to write 'without' certain artifacts and drawbacks of FIR/IIRs
On Tue, Mar 3, 2020 at 4:36 PM Zhiguang Eric Zhang wrote:
> I just remembered, have you heard of Trackspacer? This plugin does what
> my code implements, but maybe with smearing and latency and other drawbacks
&g
I just remembered, have you heard of Trackspacer? This plugin does what my
code implements, but maybe with smearing and latency and other drawbacks of
FIR/IIRs:
https://splice.com/plugins/3463-trackspacer-au-by-wavesfactory
-ez
On Tue, Mar 3, 2020 at 4:30 PM Zhiguang Eric Zhang wrote:
>
A__demofox.org_DSPIIR_IIR.html=DwMGaQ=slrrB7dE8n7gBJbeO0g-IQ=w_CiiFx8eb9uUtrPcg7_DA=MCaeQU6n-HJBdcqPwGQny3Xr_DasnmJQJckL81kti4I=X7y5DFBfNRVoyS7lKfy3p86uXFVEgRMP4eXlqiyUnuo=>
>
>
> On Tue, Mar 3, 2020 at 1:04 PM Zhiguang Eric Zhang wrote:
>
>> this is cool, i can't believe I actually worked on FFT filterin
this is cool, i can't believe I actually worked on FFT filtering (via phase
vocoder) before learning FIR/IIR filters ... ?
if anyone's interested in that source code it's here:
https://www.github.com/kardashevian
On Wed, Jan 15, 2020 at 11:20 PM Alan Wolfe wrote:
> probably pretty basic stuff
24 matches
Mail list logo
