Theo Verelst Local Diary Page 45

I've ditched the usual header for the moment, I think it doesn't help much anyhow.
This page is copyrighted by me, and may be read and transfered by any means only as a whole and including the references to me. I guess thats normal.

Home (alt)   Tripod Home   Local Diary list   Tripod Diary List   Previous Diary

This page is under contruction, so check back later, too.

  Thu Mar 13, 16:45, 2008

Well, it worked again to make the last page interesting.

So now what ? Just work out the ideas, eh, and uh maybe this some more, this a bit less, you could maybe try this so and so, but not all that heh.

MMmmm, no. I think like high and moving on is best, not keep grinding existing stuff, though some worklines I set out would be good, IF THEY WERE WORK! Well, I mean paid work, and they´re all not as most know.

So I made more free service, the birdcan is working and here I continue with the mathematical audio wave server. I think I´ll build some high level of work credibility.

And I´ll explain some stuff, maybe I can work in 4k motion picture stuff if I have added value, isn´t it. Basically I like the ideas and the power of making great pictures, and I prefer more neutralness than is even in lets say HD DVD or so. In fact I have a lot of HD material (like 6 hours raw material) which is not all great and certainly not all cinema or containing many people with opinions or acting, but sure a big part is usable for film purpose. So some more frame of material I shot the last year or two I guess will make some people convinced it is useless to keep thinking their pixelmessing will ever interest me. Never? Well, I engage in it myself, and have in the past, I guess it depends on how and what, but before I´m satisfied with all sides of it I would go pretty far and probably mostly think neutral is best, and as many accurate pixels as possible is best. People have jobs I suppose making video look certain ways. I would like the analog signal path back, and I´m sure it is possible to optimize for various types of TVs. Nothing wrong about it, but no purpose in itself I think, I´d prefer more accuracy over all that pixelm*.

So 4k it is ?! Well I saw ultraHD which is like 16 (4x4) the resolution of 1080HD on the Ibc tradeshow a few years back, that is great, I´d like to play with that, too. And then maybe it is like with great audio the point changes from making something that could look good to being able to make a lot of things knowing that isn´t the challenge anymore.

New Audio

Dx7 emulation per 4:

These settings give great sound:

A Dx7 sound editor using java, on Linux, which actually works with a Hexter Dx simulation on another machine, over a midi connection, in fact an actual one!

rg-20080324-165300-4 [.wav]
rg-20080324-165416-5 [.wav]
rg-20080324-170257-6 [.wav]

shout_16b [.wav]
shout_16btpiece [.wav]

stuff2 [.wav]
stuff2_16bit [.wav]
stuff2noyamin_16bit [.wav]

What´s with this DX-7 stuff, Theo, getting old-fashioned. Hah! Really ?! I think there are lightyears of old fashioned stuff which nobody from the new kind has ever heard or would dare to dream about even. FM is a great synthesis form, and allows for playable, musical sounds and also the principle is interesting as simulation of natural sounds, and far from dead, certainly in 6 operator form.

Did you ever check out the films from QSC, the world´s leading (PA) amplifier company?

great soundbite, and great visual in this fragment. For the rest: what a shame the makers of the demo film are so weird.

Would I please like to state my name? No, I´ll wait until I become the director of one of the biggest Californian companies (I guess) with total roots in the good ol´60´s and 70´s and it´s music and be accordingly respected, and then people *know| who I am! Isn´t it...

The mathematical sounds page revisited

Well, I did some homework, and there is is again!

I ´revived´ the sound from math web application in a safer way, meaning less ways to abuse the setup for malicious internet users. So I made a new small, totally unpowerfull user acount on the server machine, which can run a script to do the sound file rendering using a lot of programs in the meanwhile.

I made sure the requested formula can not contain sensitive characters and certain keywords, and there is a brokarage process between the server (apache 2) and the main script (a tcl script), and as I said the special user account allows almost nothing, and certainly only file-writing in a very limited number of places. It can´t even read from the main user accounts, and Linux in that sense is fairly serious.

So it´s on again, and rather improved: I render a soundfile from a maxima formula of in principle any complexity, which may include integration and differentiation and even solving differential equations, and because the web application uses ram-disk sped up compilation I can render a 3 second (could be more) CD quality soundfile in a short time from the formula.

I improved the setup by also rendering a prettyprinted formula using Latex, and a big accurate graph using gnuplot, and both these also appear on the page which comes from the cgi script. In fact I could use another machine to do computations instead of loading the server (distributed computing) because I communicate even the information on the web page over sockets, which could easily run between machines.

So is it perfect? Probably not (there is no way to stop simultaneous renderings from fauling things up yet for instance) but it is great fun.

And I get to render perfect mathematically made sound samples even on a mobile phone with internet, to play with sound synthesis without having to bring the server!

Try it out from here, if you want. That page contains sample url´s which point to the actual rendering script.

An example, typing*%pi*x) gives:

as prettyprinted formula, and this as sound graph:

And the added sine waves sound like this: mp3 , wav .

Is this trivial? No, certainly not, it is in fact hard to make, and a challenge. The making of these things involves the use of maxima, tcl, fortran and C code with compiler, latex with tools, and gnuplot, and the srcipts to make these tools work.

I may also be that not so many people are interested in this much power of this kind on a webpage, but on the other hand it is an interesting subject, and a very good idea to bring to the attention what sounds can be made like, in this case for pure mathematics, and in a uncolored way, so that I or somebody else don´t tell the user of the mathematical sound renderer what mathematics they should use: it can be any formula which can be made into a sound (when done right that is) and without a certain guidance or blunt oppression to govern the process.

There isn´t a comparable tool available on the world wide web to my knowledge so it is also an asset for the general web audience I think, and in fact for demonstrations it should work good. I even can use a mobile phone to give a sound rendering command and to download the resulting mp3 sound, which makes the application in essence very portable.


Bad idea, bad, bad, isn´t it. Heil h*, eeuuhm, oh no!

This is not (and should not be) from Thunderbirds, maybe some (americans) will know where it is, I hope the use of this promotional picture is sufficient fair use, but I though it so great I had to put it on:


So I was so inspired I made this because of course I could all along:

And bought myself the latest graphics card to use for hours to come up with this:

And then I magnified some old video using the GXS-1 supercomputer with 3D holographics:

And then I felt so good I went to france to buy a special Hewlett Packart R707 camera and snapshot this frame perfectly:

Oh no sorry, I made it into this by almost drawing every pixel anew with great accuracy:

and this was the HD video frame I made of the same scene:

Oh no, it was an HD frame from the start!

Got you fooled!!!

There, you see, that´s why these pages should be copied around only as a whole, or I couldn´t make good jokes anymore!


The picture of the trees is from a HD film, I processed a frame with cinepaint using the beamer as a colour reference.

The computer graphics are an example from the latest Gelato package from NVideo, which used a Quadro card and a fast dual core Centrino for about 10 seconds (I don´t recall exactly), and the image was a little postprocessed in HDR (16 bit integer) where it was rendered in using cinepaint.

The boats are a HD frame, too, I don´t recall at the moment what processing was used. It´s Scheveningen harbour.

The last pictures are also from a High Definition film frame, processed in 2 steps, with more elaborate processing and some image filtering tricks. Probably I used frame averaging, too.

 (click image for original frame made from mpeg-2 TS by mplayer)

Clearly processed. And without staying within reasonability.

An abrams tank with Gelato. The left of the image composition contains traced shadows and a complicated indirect lighting term, the right part of the two images used was made in maybe 10 seconds by gelato rendering without more complicated lighting. The 3D model used for the renderings is from the internet, probably from gunpoint.

Steps in HD frame processing

Some possible steps to make frames fromtheSony HC-3 High Definition (1080) camera more colorish or give a nicer impression, and possibly more realistic.

Motion currection by Pinnacle, not thrilling.

This is from a random leveled piece of earth where the cam´s view is moving forward, and the motion has been stabilized by pinnacle studio 10.5. Looks not so nice to me. But it doesn´t do HD ! Yes it does. And takes it´s time, of course...

Construction time in front of a ´temporary´ screen setup, it´s an Ikea woodwork

Another AES meeting, the current dutch chapter head presiding, acoustics at Berkeley, I want to go there !

very processed test picture

attempt to make a snapshot look like those great ol photographs

Old paintings in Amsterdam

Unprocessed picture of pro

Bio cow flesh!

Some flower in a glas photographed by phonecamera, and processed.

Guess what that is.

fairly extreme image processing, after reducing a Sony picture to 16  bits per rgb color and half the size in both directions.