Alex Radzishevsky

Dear guest,

my name is Alex Radzishevsky and this is my homepage. I update it when time permits.

I’m in computing for 30 years. I was a member of Fidonet (2:461/113) and had my own dial-up BBS, I am still in love with tracker music and demoscene, and I still use Norton-style file commander on my modern Windows PC.

You will not find me on facebook et al. I prefer a little more old-school means of human communication – email, chat, Fidonet, IRC, phone call, or meeting in person. It is way better than burning time for nothing in the pseudo-social networks. And fortunately, I do have better things to do in my life.

If you want to communicate with me, you can simply drop me a line by email. If you just want to learn a bit about me, you can find here all the information that I decided to share with strangers. If you came across for professional purposes, you can look at my LinkedIn profile. In case you just want to see some of my photos, you can find plenty of them in the photo-album, which I update from time to time.

All recent posts are located below.

Warm regards,
Alex Radzishevsky.


Уважаемый гость!

Меня зовут Александр Радзишевский и это моя домашняя Интернет-страничка. Я обновляю её время от времени, когда руки доходят.

Вы не найдёте меня в фейсбуках и твитерах. Я предпочитаю чуть более старомодные способы человеческого общения – электронное письмо, чат, Fidonet, IRC, телефонный разговор или, на худой конец, личная встреча. Всякий из этих способов куда лучше бесцельного прожигания столь ценного времени в псевдо-социальных сетях. И, благо, покамест мне есть на что это время потратить.

Если Вы хотите связаться со мной, это очень легко сделать, отправив мне электронное письмо. Если Вы зашли сюда, чтобы что-то обо мне узнать – на этом сайте Вы сможете найти обо мне всё то, чем я решил поделиться с незнакомцами. Если Вы попали сюда с какими-то профессиональными целями, то можете перейти в мой профиль LinkedIn. Если же Вы просто заглянули, чтобы полистать мои фотографии, то в моём фотоальбоме, который я периодически пополняю, их скопилось уже немало.

Все последние заметки располагаются чуть ниже.

С уважением,
Александр Радзишевский.

Слава Україні!

I’ve received a U.S. Patent 10,089,994

I’m proud to announce that I’ve been granted a U.S. Patent 10,089,994 for a novel acoustic fingerprinting approach that I’ve developed. The new technique has been implemented in AFT (Audio Fingerprinting Tools) software solution and is offered at AudioWatermarking.info.

For more details refer to: http://audiowatermarking.info/aft_main.php

Patent text at USPTO: click here.

New photos in the album

Added photos from the following trips:

New photos in the album

Added photos from:

TrustedAudio.com — secure, watermarked audio delivery platform

We’ve just launched TrustedAudio.com – secure, watermarked audio delivery platform.

TrustedAudio is a web-based service addressing anti-piracy needs of individual musicians, composers, labels, studios and various music and audio professionals (and especially those, who are less into “computer science” and more into their profession).

A short description: “TrustedAudio (TA) is a professional web-based tool that provides an easy and reliable way to share, deliver, and distribute audio files securely by means of watermarking and digital signing. Simply log in, upload your audio files, fill in the recipients’ info, and send the files! All recipients receive their own uniquely and inaudibly watermarked (“digitally signed”) copy of each distributed audio file. Unique watermarks are embedded into every audio file copy delivered to each individual recipient. Records of each watermark, together with the file and the recipient info associated with it, are securely stored in the TA database, enabling the file owner to identify and back-trace delivered copies at any time, instantly and reliably”.

More information: TrustedAudio.com

A brief history of everything

wavedraw – a simple tool that generates BMP waveform picture of a sound file

Ever needed to generate a waveform picture of an audio file? I was in need of such tool myself and, to my big surprise, didn’t find any! So I wrote it myself. The tool loads a standard RIFF wave sound file (.wav), generates waveform picture and stores it in BMP format. You can specify any desired picture size and background/foreground colors. Only one (left) audio channel of the input file is analyzed.

the tool is free. Use it on your own risk.

I place Windows, Linux and Mac binaries in one archive: wavedraw_all_os.zip

Earth time-lapses, true images from International Space Station

Fast square root sqrt() approximation on C

A good comparison of different square root, sqrt(), approximation methods on C. Useful.