Theo Verelst Local Diary Page 34

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  Sun may 28  19:38,  2006

   Done with the previous diary page and still standing? I don't want to knock people of their feet, but because of the complete lack of interested people to make a normal or better difference in my life to go somewhere where I wanted or to lets say make sure I'm being asked overseas or God knows what reasonable possibilities should be open, I have the purpose of not understating my own capabilities, simply because modesty would probably give certain people a handle to try to call me crazy after all.

I sometimes feel in this country as if the invasion of the bodysnatchers has taken place instead of the revelations of the enlightened boys of their mothers like the New Age motherf*s will have us all believe.

I wrote the introduction above at the time indicated but I lately tend to take longer than a few days to work on a diary page, which is not listing all my activities, and certainly not all my thoughts, though most stories and thoughts are relevant to know something about me. Girlish, maybe ? No, its somewhere between a laboratory journal as professional hobbyist and 'Dear Diary' in a magazine, and a professional public news-blog and an intelligent internet chat for one person. The most of this page is written later, this the day after T-monday.


That's because last monday I did a short presentation at the AES meeting at Phillips eindhoven about some of my audio related work, I could easily load the web page with the information and pictures during the lecture sequence from my server on the presentation notebook with beamer, though it had no audio.

   After everybody had left I decided to make a picture of the surround presentation room

The succesfull DA converter had been put in the bag already in the above picture, and the audience out to diner, only a side speaker of the surround sound system is visible. It was supposed to have cost about 25 thousand euros, but I wouldn't give it that, it sounded a bit weak, fuzzy, maybe had sampling issues, but I don't know for sure, high range was a bit weak, subwoofer very limited in appeal, though there was low end. As often is the case with the say 20 cm diameter speakers popular in certain types of expensive hifi systems (also where pipes are popular), the midrange sounds compressed and not very lively.

Well, I got an input to the system, just stereo, and the recording (16 bit stereo 44.1 wav) I made only the same morning before I got on the train (no more car...) sounded apart from notably noisy because the battery powered usb appearently has a too low voltage for the AD converter to feel happy about converting with its normal dynamic range, quite well in spite of being a recording from the DSP board analog output (form the 24 bit 48KS/s DA converter).

I know the sound of the synth and the DA converer, which is quite quite neutral in many ways, including unprocessed, straight microphone recordings and reproductions which works good, from at least three different speaker systems and a Sennheiser headphone as reference too, and of course the recording sounded good, but also as I wrote above. It seemed also that the normal 0dBm or so output voltage of the DA converter wasn't enough to really make a good volume, and there was clear (notebook) switched supply or grounding noise noticable in the surround amplification, that should be preventable for a profi system!

First, a song. That hardly anybody can learn.

Well lets start that long time line of thought with songs many people know the originals from, like "Message in a bottle" and "mamma mia", of which I did some short renderings in a very short recording/multitracking time (hour or so), mainly to communicate about the difference of taking a compressor and chorus unit and some lame drum samples and some audio processing tool and making music.

The wav files are 44.1 KS/s / 16 bit stereo (full normal CD quality), and therefore big.

  Message in a Bottle (originally from The Police)
   compressionon drums and a bit of plugin reverb on drum and brass (26.6 Mega Byte, wav)
      mp3 (256kbps)    mp3 (48kbps)
   the same + tv reverb and track mix compression.  (26.6 MByte, wav)
      mp4 (256kbps)    mp3 (48kbps)

   mamma mia with electric guitar  (14.8 MByte, wav)
      ape (50% compared to wav)     mp4 (256kbps)    mp3 (48kbps)

   synthesizer disco experiment (16.5 MB, wav)
      ape (50% of wav)    mp4 (256kbps)    mp3 (256kbps)

Format legenda:
lossless compression format, available for winamp, about 50% reduction for most stereo wav files.
the well known mpeg-3 audio format. available for most modern players.
aac (newer than mp3) audio coding, bit better quality or lower bandwidth then mp3 sound mplayer, recent winamp, recent quicktime player can play these, possibly windows media player if you have the codec.

I was reading an article in Sound On Sound magazine which describes "Recording a String Section"  with expensive enough equipment, various microphones and mic setups and there is an accompaying internet page with short recording examples in mpeg format.

I've used

I've seem him in holland, but I found this dvd from Mike Stern Live (New Morning, Paris) where he plays with mr Chambers (drums):

A short sample from the DVD in mpeg-4 format, 30 seconds of the beginning, with mpeg4 (Quicktime for Linux) video (29.97fps, yuv420p, 720x480) and Aac encoded audio (44.1 kHz stereo coming from main stereo stream), resp. at 700kb/s and 256 kb/s, totalling a bandwidth this server can serve in realtime if your adsl is up to it and there is no contention..

Happy viewing! Not many artifacts or coder trick abuse here, and quite acceptable sound, so as internet viewing goes, this is more than quite bearable. I could play the file (right click to download) with mplayer (linux or windows XP) Quicktime Movie player (on XP it gave a warning but it works fine), the video with an old microsoft media player and the audio with winamp.

The commands to create the above were:
   mplayer -dumpvideo -dumpfile  /Video/stern.dumpvid dvd://1
   ffmpeg -i   /Video/stern.dumpvid -t 30 -deinterlace -b 3000 /Video/stern_k.mp4
   ffmpeg -i /Video/stern_3k.mp4 -i /Video/stern1.wav -b 700 -ab 256 -vcodec mpeg4  -g 300 -bf 2 /Video/stern1.mp4
The stern1.wav file I made by playing the (officially purchased) DVD with mplayer in a XP machine, starting up Nero Waveeditor and adjusting the audio and record and level settings such that I could capture the played audio in a wav file, and recorded a minute with wabeeditor from the windows audio bus (better would be over an optical link).

Some pictures, maybe ? 

This picture is from france, after some processing::

The big size is for people with bigger screen sizes for their browsers.

This is a quick sideway photo from a (photo paper, 75x50) printed graphics work, which is shown below (under 3D programs) . Another recent picture:

Its the view of the Philips management tower in amsterdam (with a zoom).

I'm reading the latest (I got it a week or so after it came out!) John Sandford, which after a few years developed into New York times top selling auhtor, called  "Dead watch":


HiFi from 1959 !

From just before the sixties, these are scans from handbook for electronicists (I had one at home when I was a kid) full of worthy and relevant and fairly hard electronics information from the time that stereo was still a rarity:

Yep, an old term already "HiFi".

The HiFi official norms!!!

I recall that as a kid (in te 70s, lucky me) I wondered wether equipment I listened to or even could use for myself would actually be up to the official "HiFi" norm.

not so many years later, I knew I had built and owned equipment which was certainly a lot better than the at the time for ridiculous norms for the frequency range and distortion, excpet for speakers....

Well, quality and High Fidelity (closeness to the original) are terms which I use for my equipment, but they go way back was we see proven here!

Pedofile Fascists

Ouch, thats a miserable expression.

Like "bloody Nazi" or "Schweinhund" or "motherf*ing liar" or "Platonist Demagog", "Childabusing Schizofrenic", "Dr Jackhal" or what have we, dictionaries full of swearwords, I'm sure for every language there is an internet list of swearwords for many swearing occasions.

I tend to want to write such that these pages will not be sufficiently offensive to be somehow banned from real or fake 'neat' loving people. The title of this section is composed of  decent scientific terminology which however gives me the creeps, too.

I remember seeing those Nazi time movies on Discovery Channel, or maybe National Geographics, where for instance naked or strangely half-mature looking

I remember an argument in the student house I lived in about adultness coming from catholic side, where a fresh woman/girl was simply
rendered mature enough to be not respected.

The way I used to think about childabuse is more general than pedofiles, and of course on one hand the pedofile social or sexual abuse is more severe and on the other hand, the pedofile is supposed to lets say be "in love" in some horrible way with a child.

That "in love" idea is where 1984-like games find place I think, where "programs" have to be invented to "teach" young, small, impressionable and fragile kids to stay quiet, be impressed or so and under control, and all the evils they want them to learn.

I had a nephew come and stay with me in the Hague when I was little boy (like in the 70s) which I suspect might have been in touch with pedofiles when I think back on the way we talked and played. My own 'dad' may have had mean pedofile intentions, I should rethink a lot of things to make my mind up, but I'm sure that in normal interpretation I wasn't taking part in any sexual abuse (being that is).

I am not a pedofile, I'm sure I don't need a Pedofile Anomymous.

That is a valid thought, not just a joke, in either explanation. When I took distance from university people I though might be evil, in the news (in holland and belgium) there was talk of pedofiles, and there was a book out called "children don't like crocodiles" (in dutch "kinderen houden niet van krokodillen" (for google) and maybe french) to draw attention to the problem which was in the context of the dreadfull dutroux killing of children in a underground basement.

The answer I've heard to the pedofile abusers in that time (around 1995) was that the people who would be found guilty of crimes in the area should be corrected in their behaviour by getting the chance to have their psychogical problems worked on, lets say therapy, and not death row or very heavy punishment. For persons who have abused children that sounds horrible to me, I don't think that in general such people should be tolerated much, I can imagine the sheer number of problems in this area makes one think that solving is better than punishing.

The hip hop guys and gals don't seem to be all too free from pedofile thinking, thats a big group, which is miserable. I guess people from pedofile families have trouble with certain normal behaviour and tend to think pedofile patterns of reasoning are ok, that doesn't mean being a pedofile, but possibly heaving been hurt or abused or used to people with such thoughts.

From Google Video, I've learned that there is most likely a whole network of pedofile rich/influencial people wanting to have power I guess to keep themselves from exposure and legal action. See for yourself for instance:

Conspiracy of Silence - Illuminati Pedophiles in Washington D.C. (documentary)

Posted to Google by John Conner & The Resistance
55 min 12 sec - May 3, 1994

 From Senator John Decamp:

In mid-1993, after The Franklin Cover-Up had been circulating for almost a year, the British-based TV-station, Yorkshire Television, sent a top-notch team to Nebraska to launch its own investigation of the Franklin case. Yorkshire had a contract with the Discovery Channel to produce a documentary on the case for American television.

Finally, the big day came. Their documentary was to air nation-wide on the Discovery Channel on May 3, 1994. It was advertised in the TV Guide and in newspapers for that day. But no one ever saw that program. At the last minute, and without explanation, it was pulled from the air. It was not shown then, and has never been broadcast anywhere since.

I have a copy of that program, which arrived anonymously in my mail in late 1995. When I watched this pirated copy, I could see clearly why the program had been suppressed. Conspiracy of Silence proved, beyond doubt, that the essential points I had stressed in the book (and more) were all true.

That is of course a big conspiracy, a very mean and evil power which should be dismantled and cease to exist as soon as possible, I'm sure by far most normal people have that opinion, unless they are blackmailed or threatened.

Dangerous to write? Well, I guess there are already occasions where I'm a bit banned (besides other ongoings) Verelst has a constitutional right to speak and even a (in holland) a legal duty to report crimes, and doesn't want to be a coward. Wasn't, and isn't going to be. Besides, who wants to defend pedofilia, lets get this over with!

See you later, alligator. In a while, crocodile. I think orcas eat crocs, too.

Lunch in America

"Smugglepit or crapwell"

I used to have a good reverb when that was still relatively new, a Yamaha REV-7 which around '85 cost me about $1300 as a sale from my most used musical instrument supplier (mostly on my dads account at the time, though I had study financing and I worked various jobs) they recommended the machine as expensive but a very good price for a professional machine, and I knew both so I went for it and was never sorry!

What a wealth and rich warm sound suddenly filled my tiny room setup! Great.

I learned from books or magazines or maybe from television courses that reverb is always too much in a mix unless it has been adjusted to the lowest level still acceptable for the producer, so always adjust the effect return (or send) for the reverb unit as low as jou think it still works for the song, that's usually the best.

For effects, that's not necessarily true so a heavy gated reverb on the snare drum, or a surround effect with a quality reverb are different cases, as is a tapped delay on a synth or guitar (or flute...) solo, ten the effect, like with chorus, is fine when the volume of the reverb is the same as the original in the mix.

Thats good information, for free... Well, its hard enough, it's like trying to make a commodores cover recording: almost inpossible unless you're a skilled and good musician. So it is like watching the pros: nice but you shouldn't try it at home or your ego would suffer.

I have given myself the assignment to make a commodore song cover which sounds a bit like the original, except for voices! I haven't really started yet, but I've checked out some drum sounds from the beginning of Night Shift...

For drums, reverb settings or circumstances are important on modern sample synthesizers it can be found possible to set volume, pan and effect send settings per drum sound, so the bass drum can be given a slight reverberation or cabinet effect only, the snare a heavy gated reverb, the toms a good heavy reverb, etc. though it isn't necessarily so that one can use more than one different reverberation effect.

As I've written on a previous local diary page I made my own Reverb running on DSP and also on pentium computers, which is NOT open source, and which is 4 channel, not just stereo. That reverb, when applied on a (analog) signal from my USB DA converter, and mixed in on the main stereo and a rear amplification comprised of the two powered bi-amped monitors sounds extremely good as surround reverb, expecially now the main speakers have been phase corrected and the main mid-highs sperately amplified.

5.1 or quadro ?

In the 70s when I grew up and had quite an interest in audio like the major status symbols like HiFi equipment, speakers, good music and recording. Stereo was available enough, though certainly not everywhere, but Quadro was one of the Desirable Things, which I'd hardly experienced in practice.

It appeared there were records out with not just stereo by doing tricks with the needle track, but 4 channels encoded into it, and equipment which could decode those signals, and of course amplifiers with 4 channels and extra speakers.

A cinema had that at times, too, which was great.

Needless to say quadro in that time was out for me, not a chance, probably way to expensive...

Currently we have 5.1 which is quadro + middle channel + sub-woofer channel. Mostly hpwever, the mid-front channel appears to be taken as scratchy sound source identifiaction trick channel, and of course one can create a sub-woofer channel oneself by filtering the main front signals.

In fact I make my own sub signal (12 dB/oct filter at 40 Hz) from the mix of Front Left and Front Right, which is reproduced by a extremely heavy 15 inch woofer, which sounds impossibly better than those vacuum cleaner outlet like cheap bass boxes, and also the sound from the .1 channel is usually made for those cheap devices and sounds absolutely dreadfull.

So stick with quadro, the space information in the mid-channel is not worth trying out. A bag of bad tricks, nothing for serious audio enthousiasts in my experience thus far (maybe I tried the wrong 5.1 sources).

I've downloaded a (paid) article from Electuur electronics magazine about an amplifier I've studied some years ago, which interested me because it as both very high quality and extreme power:  up to a (real...) kilowatt per channel, about the maximum that can be driven from a normal 230 Volt outlet.

There's a german company which sells kits for this build it yourself amplifier, they aren't exactly cheap though, these machines.

MIT courses !

The Massachusetts Institute of technology  has a truckload of high level university courses on te internet, for free!

I saw about it on CNN, and checked out some physics andmathematics courses, the mathematics department has videos on, which is cool, physics has course outlines, books, and exams and exercises with solutions on, and remember this is one of the worlds top universities, this is heavy material!

Davidson on the Internet!

Long ago, before things went really miserable for me, I had started to look into the translation issues of the Old Testament of the bible, and I had from even longer ago a lexicon from the previous century (1850) with all the hebrew words and derivations from the old testament books.

I had tried to come up with a word translation method which would make use of the pictorial meaning of the hebrew letters, assuming there would be one and that I could find the right meanings, which to an extend seemed to work, and give me sensible translations and prevention of errors as present in the normal main translations (see also example 1 and example 2 , rationale).

Recently I've been able to order The Analytical Chaldee and Hebrew Lexicon from, and I've started scanning in the pages with the lexicon. Here is a first start of a web accessable set of scans. Mind that the copyright is long gone, and the man no longer alive, so there is no problem with that !

An example column from the book:

Main speaker phase linearisation

I've started the speaker upgrade with measuring the difference in height between the middle of the dome of the hight tweeter and the average cone depth of the mid high tweeter. I measured with a slide gauge with respect to the flat speaker front plate and found material to make up for the height difference by putting two layers of hardboard behind the mid-high tweeter.

Above the 2 layers are shown being sawn out of a plate.

This is the tweeter which will be lifted:

First: demontage

electrically descrewing the grille, and removing the grille:

The tweeter without height adjustment, removal of the main mid-high tweeter montage screws:

carefull not to damage the sensitive cone of deform the metal (the tweeter is only €7.50 but it needs to be in perfect condition or distortion will result), removal of tweeter:

Finishing of the adapters which must fit good to prevent any air-leakage, these pressure enclosures are quite airtight: when the woofers are displaced it takes them over 10 (ten!) seconds to return to neutral!

After removal of faults and unevennesses the distance rings are put in place to test the fit on the back of the flange of the tweeter:

Now the tweeter with distance assembly which has been drilled through for the scew holes which also have been evened is fitted in place:

The very long and heavy standard size screws carefully back in place with exactly the right tension, and not over pulling of the sensitive speaker rim:

And then of course the grille back on...

What did that little change do for the sound? A lot! the definition of the middle high tones at the normal listening position has considerably improved, because these 7mm of phase correction correspond to a quarter wavelength of tones of 10 kilo Herz and even more for yet higher (very audible) tones. Th ecrossover frequency is a little under 10kHz for the dome tweeter, so at this frequency, which is reproduced by this little speaker, there is simulaneous sound reproduction withe the dome tweeter.

At the sweet spot of the speaker setup (which are a little bit tilted upward and almost at head-height) the effect is a much nicer and more open sound which I kew from previous systems had made/had should be possible with these quality components and the good amplifier and DA converter I use.

Main speaker bi-amplification

There was an even more audible unnormality plaguing me about the main speakers, preventing all to accurate monitor use a bit, which is the loudness of the mid-high cone speakers, which is a lot higher than the other 3 speakers in the enclosure. That was very audible.

So I finally decided to make the main speakers bi-amped (though not yet actively filtered) because of course no sensible hifi-designer can afford to make damping figures of like 500 reduced to 2or 3 by using passive power reduction, apart from the rather danting task of finding a resistor which can dissipate up to a few hundred Watts of peak power....

Basically I use another high quality (but less top power) amplifier to drive the mid-highs at significantly lower (and adjustable) volume keeping perfect quality and keeping good damping figures.

To make this possible I needed a sperate connection with the mid-highs which in a air-sealed enclosure is a bit of work (everything is screwed tight and all the edges are silicone kit sealed), but I copied the main wire output on the back with another 2.5 square mm thick good audio cable.

That cable is connected to another amplifier which is connected in parallel to the main signal pre-amplifier output with the normal high power amplifier and the inputs to the sub-low bridged amplifierm for a total of six amplifier channels for these main monitors.

The small amplifier has more than sufficient power for the 2x20Watts needed for the mid high tweeters with this 160 Watts toroid transformer connected to it:

From normal sound management point of view it is fine to have the frequency namd around the sensitive 3-4 kHz amplified with less power than the low and sublow range, and also less than the (in this case powerfull) tweeter, which needs to generate the loud high to very high frequencies and transients.

The result? Thus far the speaker system sounded extremely good and strong, with these upgrades it sounds more excellent, more even in frequency range obviously. The songs that are well mixed or challanging sounds even better than before already, and for instruments and mixing the system sounds very very good now, apart from the already very attractive quality.

Sweet and powerfull (It should be at over 500 Watts of total actual power).
Very detailed and capable of accurate and wide and deep stereo image and good and live-amplification like transients when asked for it while remaining almost scary rock solid in simultaneous continuos highs and lows.

Har har.


Not all good things in life are free, and not everything that's free is good, but some good things are even free!

Cinerella is a free and fully open source movie edit program for primarily Linux,which allows viewing and editing (real time) of all kinds of video formats, including mpeg and mpeg-4  and audio, effects (audio and video) also in HD (High Definition) format.

Absolutely marvelous!

Is it finished ? Uhm, some things don't work (yet), there are issues like obviously speed (even a 3.3 GHZ 64 bit Athlon has its limits) but its great to have frame for frame viewing and editing possibilities for mpg movies working great, and quicktime/mpeg-4 for linux movie writing is cool.

Also, it runs over the network with remote X windows, and it looks and views great.

The above is a screendump of a medium large cinerella setup running on RedHat Fedora Core 4 / 64 over a network with the display on a notebook (which of course doesn't allow for full framerate viewing). Alternatively, I've run E-Live, a one-CD Linux distribution which starts from CD without requiringan isntall, which contains cinerella (inabout this version) and which seemed to give full framerate enhanced D1 video quality on a pentium D machine (just a pity E-Live doesn't allow remote X windows to be shown, there must be a safety option somewhere...)

The above screen dump is from a fedora core4/64bit version which I compiled myself, from scratch, because to my knowledge there is no precompiled version for this OS yet, let alone a (fedora) Yum install.

So I set down one evening, and later in the night following I had compiled 5 or 10 external packages and their dependencies and the cinerella package (minus the firewire support) which indeed started up!

If someone is interested in the compile/install log let me know.

This is an example still from a small sequence I made (in mp4) from a BBC improved resolution signal (digital satellite) film containing two version of the same mountain scene which are time shifted during the flying camera movement and the crossfade into a map image, the mix is made using the sliders on the left of the edit window:

This still has noise from the map and looks moderately sharp, the sequence result  looks quite sharp when played as (high bandwidth) mp4 file.

Free / Open Source 3D Graphics

NVidia  has released its Gelato rendering software to be freely used, with some limitations (but not size or quality) with respect to the commercial version which costs $1500 (iirc). Gelato makes use of the NVidia graphics card of a computer to togeher with the CPU render complicated graphics scenes in high quality, and with considerable speed when compared to jsut about all other rendering solutions. Hurray for NVidia!

I've made a Interactive Gelato page which contains a small gelato rendering example program which can be called to run from the webserser, so when you change the (single) parameter to the cgi page, an actual gelato program (I installed Gelato with some effort on Fedora Core 4 / 64 bit) starts running, lets the graphics hardware of  compute for you, and puts the resulting image on a web page.

I've mentioned this in the gelato forum, and hundreds of program runs afterward seem to indicate all works well.

This is the last image rendered by someone trying the example page:

  currently unavailable

A more profound example of the renderpower of gelato s this teapot scene:

This scene is completely synthetic it contains no photographs or scans, only 3D models and mathematicak methods. The big version, which I've rendered for a printed photograph of 75x50 cm, took an hour and a half or more on the server for a 3500x2500 or so resolution. And it looks great in print. The large (printed) version is not freely available.

The shadows and refection are not of POVray level of complexity: using the graphics card (which on the server is a moderate NVidia 6200) as co-processor, complicated shadws and lighting and also material effects are possible, like I've used a plastic surface for the pot, too, which is responsible for translucency. And the accuracy can be higher because the graphics hardware accerates the computations, while Gelato is internally build to serve for instance the movie industry.

This (free) version should but due to a bug doesn't yet support more than 8 bits/channel, which would be even better for high quality (good contrast) prints.

A well known Open Source 3D program is Blender, which can also do radiosity, and converts file formats, and in principle appears to be able to use gelato using a python script:

The above runs on Linux (on a big screen) and is interactive: the image updates while computations progress, and the view can be transformed, that is one can move htrough the scene in real time, with the right (I've the latest installed) NVidia driver, that works good on Linux.

There are imperfections in the above rendering, because I'm trying out their parameters, the example looks nice, but in standard settings produces a bit of a trick result, which looks good because of the light simulation outcome appening to look good at a certain point.

Another graphics program I looked into is from a person who works for Sony in California, and spends free time to make great software freely available:

Its a pity that the examples from the example page are not downloadable, they look very cool!

See al list of Open Source graphics programs here.

Japanese fighter robots

Will the american-like wrestler win ?


All kinds of performers on stagein the "De Badkuip",  but only one audience member in te beginning (except for personel): me.. :

From the table, respectively with and without flash:

great, a good rose


Racemonsters? Well, 3 went against the right side, having a plan, I'm sure. These cars are built also with safety in mind. A great picture from the indy which was live on dutch tv whih is great. With mpeg-4 transcoding a bit of the race feel is visible at times, through all kinds of optimizers and mpeg and tv channel signal tricks, in this still even a bit of the very high speed and great race track feelings comes through: