LUA POSTSCRIPT

PERL PYTHON

JAVASCRIPT ELECTRONICS

TALKS SEE ALSO

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Lua

• ao, a module of bindings to libao to provide portable audio output,
• CommandLineUI.lua, a command-line user interface, like CPAN's Term::Clui
• digitalfilter.lua, provides some digital filters - Butterworth, Chebyschev and Bessel.
• Evol.lua, a call-compatible translation of the Math::Evol Perl module
• ecasound.lua, a high-level Lua interface to the ecasound interactive mode.
• New !   eread - a simple text-only epub reader.
• fen.lua, This module manipulates chess positions in FEN syntax. It can apply moves to a position, and provides an application pgn2eco, which takes opening moves and outputs the corresponding ECO number.
• fluidsynth.lua, a high-level Lua interface to the fluidsynth library
• lgdbm, the manual page for Luiz Henrique de Figueiredo's lgdbm module
• midialsa.lua, a call-compatible translation of the MIDI::ALSA Perl module, based on the Python modules alsaseq and alsamidi by Patricio Paez
• MIDI.lua, a call-compatible translation of the MIDI.py Python module
• midisox_lua, the SoX-like workalike, for handling MIDI files
• minicurses.lua, a stripped-down, easy-to-use access to the ncurses library
• muscript, the free music typesetting software
• randomdist.lua, a few simple procedures for generating random numbers
• readkey.lua, simple terminal control, like CPAN's Term::ReadKey
• readline.lua, an interface to the Readline library now with Alternate Interface and Custom Completion
• RungeKutta.lua, a call-compatible translation of the Math::RungeKutta Perl module
• terminfo.lua, a translation of the Term::Terminfo CPAN module, with an added convenience get(name), and the important extra function tparm(capability, params...)
• terminfofont.lua, a big font, seven lines high, inspired by Bitfont5x7 for use when terminfo is supported such as in a console, or an xterm.
• WalshTransform.lua, a call-compatible translation of the Math::WalshTransform Perl module
• A talk Introduction to Lua given to the Tasmanian Linux User Group in February 2016
• See:   gitlab.com/peterbillam/pjb_lua

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PostScript

• The brownian.ps procedures for "Brownian Noise" curves and landscapes, to generate horizons, cloudscapes, etc . . .
• New !   The chess.ps procedures for making diagrams of chess positions, and its associated fen2img script.
• The colours.ps colour-handling procedures for artists
• The fonts.ps collection of some simple custom fonts
• The line_drawing.ps line-drawing procedures for artists
• The muscript.ps music-typesetting procedures as used by muscript
• The random.ps collection of simple procedures for handling random numbers
• The text.ps collection of text-handling procedures
• New !   The transforms.ps collection of fun path-transforms
• Some poster graphics using the above routines
• The Perl script include_run to include all run-files into a PostScript file
• muscript, the free music typesetting software
• A comparison of Perl and PostScript as programming languages, for Perl-folk as an introduction to PostScript
• Various patterns for making juggling equipment
• A movie of John Connett's pattern, as published by A.K. Dewdney in his "Computer Recreations" column in the Scientific American. Sept 1986.   It's a big file, so it may be better to download it and play it from a local disc.   And also, the script make_connett_video which synthesised it.
• A short movie (it's a small file!) of three droplets.   Also, the script make_droplet_video which synthesised it.
• See:   gitlab.com/peterbillam/postscriptlib

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Perl

• muscript, the free music typesetting software
• midisox_pl, the SoX-like workalike, for handling MIDI files
• The CPAN Perl Modules, available from search.cpan.org/~pjb
  • Crypt::Tea_JS   (the Tiny-Encryption-Algorithm in Perl and JavaScript)
  • Math::Evol   (Evolution-search optimisation)
  • Math::RungeKutta   (Integrating Differential Equations by Runge-Kutta methods)
  • Math::WalshTransform   (Fast Hadamard and Walsh Transforms)
  • MIDI::ALSA   (an interface to the ALSA library)
  • MIDI::SoundFont   (handles SoundFont .sf2 and Gravis .pat and .zip files)
  • Speech::Speakup   (gets and sets parameters for the Speakup screen-reader)
  • Term::Clui   (a Command-Line User Interface, my favourite module), now maintained by Graham Ollis

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Python

• MIDI.py,   which translates MIDI events into and from Python3 list-structures
• TermClui.py,   a Command-Line User Interface, a translation of the Term::Clui Perl module
• midisox,   the SoX-like workalike, for handling MIDI files

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JavaScript

• The Perl CPAN Module   Crypt::Tea_JS
• The online game of Laska   play_laska.html
• The online Esperanto dictionary   eo_en.html
• The   Leitmotifs of Wagner's Ring Cycle

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Electronics

• Lecture-notes of the course by Prof. Stanley Raimes on Differential Equations , taken by Peter Billam while studying Physics at Imperial College in 1967
• The paper on Harmonic Distortion in a Class of Linear Active Filter Networks , published in the Journal of the Audio Engineering Society in June 1978
• The paper on Practical Optimisation of Noise and Distortion in Sallen and Key Filter Sections , published in the IEEE Journal of Solid State Circuits in August 1979
• The paper by Oscar Juan Bonello on Distortion in Positive- and Negative-Feedback Filters , published in the Journal of the Audio Engineering Society in April 1984

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Talks

• 1997 talk on   Security   to the AUUG Summer Seminar in Hobart
• 1998 talk on   Internet Payment Systems   to the Tasmanian Ingres User Group on 28 Oct
• 2015 talk on   Much MIDI stuff - and its Lessons   to the Open Source Developers Conference
• 2016 talk on   Introduction to Lua   to the Tasmanian Linux User Group
• 2017 talk on   Digital Filters   to the Tasmanian Linux User Group
• 2018 talk on   Random Stuff   to the Tasmanian Linux User Group   ( see also the video . . . )

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See also . . .

• A first   Introduction to HTML
• A reference list of ISO characters (European accents like grave, cedilla, umlaut) and how to express them in Octal, Hex and HTML and produce them with the ALT key on a US-ascii keyboard
• A collection of useful keystrokes for various common programs.
• Peter Billam's   C.V.   and   resume   and   contact details

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