[music-dsp] Pulsed laser, microwaves and infrasounds

lso contains informations about a radar with side effects. Tito Latini ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp

[music-dsp] Radiation sampling with aliasing

recordings: https://github.com/titola/neuropa#audio-recordings It includes the resonant toy of the idiots in the subsection "Amplitude modulated oscillation of 100 Hz". Another year without justice, thanks to the experts on playstation and fantacalcio, the cowards and the corruption. T

[music-dsp] Infrasounds and low frequencies from the electrical grid

every 1.92 seconds also to take the variation of the nominal frequency to tune the signals, for example the duration between 9/49 (0.183s) and 9/51 (0.176s). Tito Latini ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https

[music-dsp] Analysis of an electromagnetic attack

Hi, I'm writing a document about my experience here: https://github.com/titola/neuropa The following video shows a part of the signal directed to my head: https://github.com/titola/neuropa/blob/master/media/head_945mhz.mp4 Any time a RF pulse is absorbed by the cerebral tissue, the tempera

Re: [music-dsp] a family of simple polynomial windows and waveforms

On Mon, Aug 08, 2016 at 07:05:17PM -0700, James McCartney wrote: > On Tue, Jul 5, 2016 at 2:42 PM, James McCartney wrote: > > > In the same vein: a family of smoothed sawtooth waves > > > > f(x) = x - x^a > > > > changing this to : > > f(x) = x - sgn(x)*abs(x)^a > > allows 'a' to be continuous

Re: [music-dsp] idealized flat impact like sound

On Fri, Jul 29, 2016 at 08:10:21PM +0200, gm wrote: > > I think what I am looking for would be the perfect reverb. > > So that's the question reformulated: how could you construct a perfectly > flat short reverb? > > It's the same problem. I receive a magic box from the cat and the fox for one

Re: [music-dsp] idealized flat impact like sound

> My problem was that a short segment of random isn't spectrally > straigh-line flat. My apologies, I've misunderstood the problem. An idea is to create a kind of "ideal" residual: i.e. the transient is a band-limited impulse and an enveloped (maybe expdec) noise is added after two, three or a fe

Re: [music-dsp] idealized flat impact like sound

sorry, that's a decay, so out is "(1 - y) * rand()": T = 1 / samplerate p = exp(log(0.001) * T / t60) y = 1 + p*(y1 - 1) y1 = y out = (1 - y) * rand(-1.0, 1.0) * gain ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.col

Re: [music-dsp] idealized flat impact like sound

On Wed, Jul 27, 2016 at 10:33:40PM +0200, gm wrote: > [...] > So my question for now is: how can we synthesize completely flat > decaying noise? > (is it even possible?) I think the modulation between expdec and white noise is ok: T = 1 / samplerate p = exp(log(0.001) * T / t60) y = (1 - p)*gai

Re: [music-dsp] efficient running max algorithm (Evan Balster)

> Hi, OP here. > > > Unfortunately I don't understand all you are saying, due to my lack of C > and Z-transform skills. > > This is what I understood, please correct me if I'm wrong: > - My algo is called a binary max-tree. (When used with max as an > operator) > - The other algo discussed is fas

Re: [music-dsp] highly optimised variable rms and more

I'll try the follow change: curr_sum += input; // add the new and acc -= buffer[i];// subtract the oldest buffer[i] = input; if (i < last) { // last is `size - 1' i++; sum = curr_sum + acc; } else { sum = acc = curr_sum; i = curr_sum = 0; } __

Re: [music-dsp] highly optimised variable rms and more

On Tue, Jul 19, 2016 at 11:40:06AM -0500, Evan Balster wrote: > [...] > *//Call this exactly once per cycle to prevent drift.* > inline void cycle() {_dn = _up; _up = > 0.0f;} > }; Thanks Evan, that's really a good idea. __

Re: [music-dsp] highly optimised variable rms and more

On Mon, Jul 18, 2016 at 02:11:13PM +0200, Johannes Kroll wrote: > I have used something similar to implement per-sample RMS. Here is an > implementation in Extempore/xtlang: > [...] nice -- if you add the modulation of the length, we have a similar painting. ___

Re: [music-dsp] highly optimised variable rms and more

On Mon, Jul 18, 2016 at 01:25:39PM +0200, Bart Brouns wrote: > Thanks for looking into this. > > I can't read lisp much, [...] The recipe is in C (three lines to show a circular buffer), but the single-line comment is enough. > [...] but it reminds me of another faust > implementation where you a

Re: [music-dsp] highly optimised variable rms and more

are a giant Phil! Sorry, the c code was a pedestrian translation from lisp. I have discovered and fixed the problem after my post some days ago (notice the elegance: "Safe" instead of "Fix" :) commit 75789ce1decb69abd80af0e854bfd09df79558b5 Author: Tito Latini Date:

Re: [music-dsp] highly optimised variable rms and more

On Fri, Jul 15, 2016 at 12:23:55AM +0200, Bart Brouns wrote: > Hi everybody, > > Let me introduce myself: > My name is Bart Brouns and I've been doing some form of dsp for almost > 20 years. Hi Bart > Started with a Nord Micro Modular, then learned pure-data, and for the > last 3 years moved to

Re: [music-dsp] a family of simple polynomial windows and waveforms

On Tue, Jul 05, 2016 at 02:42:59PM -0700, James McCartney wrote: > In the same vein: a family of smoothed sawtooth waves > > f(x) = x - x^a > > evaluated from x = -1 to +1 > > where 'a' is an odd integer >= 3. > > the greater 'a', the greater number of harmonics. > > plot: > > http://i.imgur.

Re: [music-dsp] a family of simple polynomial windows and waveforms

On Tue, Jul 05, 2016 at 02:42:59PM -0700, James McCartney wrote: > In the same vein: a family of smoothed sawtooth waves > > f(x) = x - x^a > > evaluated from x = -1 to +1 > > where 'a' is an odd integer >= 3. > > the greater 'a', the greater number of harmonics. > > plot: > > http://i.imgur.

Re: [music-dsp] Trouble Implementing Huggins Binaural Pitch

I think the Ethan's suggestion about the difference between left and right channel is the answer. We hear sum and difference thanks to the Natural Binaural Technologies (unknown copyright). Two seconds of the difference with a (artificial) post-gain of 20 dB is recorded in the attached huggins-tes

Re: [music-dsp] Tip for an audio resampler library doing cubic interpolation

SoX Resampler Library (https://sourceforge.net/projects/soxr) also provides a quick cubic interpolation with a header (soxr-lsr.h) compatible with libsamplerate. (audacity uses soxr) ___ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu h

Re: [music-dsp] proper scaling of an FFT

On Wed, Nov 04, 2015 at 08:56:05AM -0800, Phil Burk wrote: > What is the "right" way to scale the inputs of an FFT. > > I have implemented some FFT functions in JSyn. The goal is to support > spectral analysis, processing and synthesis for music applications. > > I would like to be able to measur

Re: [music-dsp] magic formulae

On Thu, Nov 27, 2014 at 01:54:15PM +, Victor Lazzarini wrote: > Thanks everyone for the links. Apart from an article in arXiv written by > viznut, I had no > further luck finding papers on the subject (the article was from 2011, so I > thought that by > now there would have been something som

Re: [music-dsp] magic formulae

On Thu, Nov 27, 2014 at 09:46:13AM -0200, a...@ime.usp.br wrote: > Another post from him, with more analysis stuff. > > http://countercomplex.blogspot.com.br/2011/10/some-deep-analysis-of-one-line-music.html > > Cheers, > Antonio. > > Quoting Ross Bencina : > > >On 27/11/2014 8:35 PM, Victor La

Re: [music-dsp] JUCE rounding hack

, char **argv) { if (argc < 2) return 1; double_float_info(atof(argv[1])); return 0; } Tito Latini On Thu, Sep 12, 2013 at 06:24:50AM +0100, Luke Drummond wrote: > On 12 September 2013 05:53, m brandenberg wrote: > > On Wed, 11 Sep 2013, robert bristow-johnson wrote: > &

Re: [music-dsp] Incudine support to forge Virtual UGens

mputer for music, I always think about the path from brain to the speakers through the machine. Before the speakers and without a soundfile there is not audio rendering but immense lands to explore. I use a REPL in Common Lisp during the trip. Tito Latini -- dupswapdrop -- the music-dsp mailing li

Re: [music-dsp] Incudine support to forge Virtual UGens

On Mon, Jun 24, 2013 at 09:30:15AM -0700, Phil Burk wrote: > Hello Tito, > > I added a link to Incudine here: > > > > Good luck with the project. Looks great. Thank you so much -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ,

[music-dsp] Incudine support to forge Virtual UGens

progress but it is starting to be interesting. The page of the project is http://incudine.sourceforge.net Tito Latini -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp