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CHANGELOG.md

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Changelog

All notable changes to the Forsynth project will be documented in this file. The format is based on Keep a Changelog.

[ForSynth dev "?"]

Added

  • A FORD documentation: a project file ford.yml and a workflow .github/workflows/ford.yml to generate GitHub Pages.
  • In example/README.md: links to listen the OGG files.

Changed

  • ELECTRONIC_MUSIC_HISTORY.md: improved layout (hidden URLs).

[ForSynth 0.4 "Jean-Claude Risset"] 2024-06-03

Added

  • In src/audio_effects.f90: an apply_reverse_effect(tape, track, t1, t2) subroutine to reverse the order of samples.
  • In src/envelopes.f90: apply_fade_in() and apply_fade_out() subroutines.
  • In src/music.f90: add_broken_chord() writes a broken chord using an array containing the intervals. It uses plucked strings (Karplus-Strong).
  • An ADSR_envelope object can now be passed optionally to add_sine_wave(), add_square_wave(), add_triangle_wav(), add_sawtooth_wave(), add_noise(), add_weierstrass() signals, and add_note() and add_chord() subroutines.
  • In tape_recorder_class.f90, the method mix_tracks() now accepts an optional array with the panoramic settings of each track.
  • In wav_file_class.f90, a method get_name() that returns the filename.
  • In example/:
    • shepard_scale.f90: a Shepard scale, giving the illusion of an ever increasing pitch in the first half of the tape and an ever decreasing pitch in the 2nd half.
    • shepard_risset_glissando.f90: a Shepard-Risset glissando, giving the illusion of an ever increasing pitch. It is the continuous version of the Shepard scale.
    • doppler_effect.f90: a simulation of Doppler effect, with a car passing in front of you.
    • arpeggios.f90: arpeggios played in various ways using the circles of fifths.

Changed

  • src/signals.f90:
    • the Karplus-Strong algorithms are now using the track 0 as an auxilliary track, to avoid overwriting what is already present on the track of the signal.
    • Signals use do concurrent loops when possible.
  • src/audio_effects.f90: the effects now use do concurrent loops (except for delay).
  • example/drone_music.f90 and example/shepard_risset_glissando.f90: added fade in and fade out.
  • src/envelopes.f90: the ADSR envelope is now a class ADSR_envelope.

Fixed

  • In tape_recorder_class.f90, the routine mix_tracks() is now clearing first the track 0, which can be used previously as an auxiliary track by some routines.

[ForSynth 0.3 "Éliane Radigue"] 2024-05-20

Added

  • music module:
    • A subroutine add_chord(), using an array containing the intervals of the chord. Allows chords such as 7th, Sus2, Sus4... using the music_common module.
    • A function fr() to compute the frequency of a note, for example "A#3".
    • Several music scales stored in arrays.
  • signals.f90 module:
    • a new fractal add_weierstrass() signal.
    • add_karplus_strong_drum() signal.
    • add_karplus_strong_drum_stretched().
    • karplus_strong_stretched().
  • The method mix_tracks() now accepts an optional array containing the levels of each track (except track 0) in the mix.
  • Demos in example/:
    • drum_machine.f90 using Karplus Strong drums, following a pattern defined in an array.
    • misc_sounds.f90: creates miscellaneous sounds in WAV files, especially obtained by frequency or phase modulation.
    • drone_music.f90: experimental drone music.
  • A ROADMAP.md file.
  • A logo.
  • The example/README.md file.

Changed

  • src/forsynth.f90:
    • the working precision is now wp instead of dp.
    • The class file_t was renamed WAV_file and put in a separate file wav_file_class.f90. close_WAV_file(), write_header() and write_normalized_data() are now methods of the object.
      • The duration and number of tracks can now be set when we create a new WAV.
    • A class tape_recorder was created and moved to tape_recorder_class.f90. It contains the arrays and their related parameters, and the methods clear_tracks, mix_tracks, copy_section...
      • clear_tracks() is now automatically called when creating a wav_file or tape_recorder object.
  • src/music.f90 was splitted in two files: src/music.f90 and src/music_common.f90 which contain music theory elements common to the ForMIDI and ForSynth projects.
  • src/demos.f90 was removed and split into example/demo1.f90, example/demo2.f90 and example/demo3.f90. They can be run with the fpm run --example command.
    • example/demo3.f90 was then split in two: demo3 (two scales and a blues) and demo4 (signals).
      • and demo3 renamed blues.f90 and improved.
    • demo1 was renamed chords_and_melody.
    • demo2 was renamed demo_effects.
  • demo4.f90 renamed signals.f90.
  • Examples are now using keyword argument lists to better document how the API must be used.
  • The alternative build.sh was improved.
  • Now under GPL-3.0-or-later license.

Removed

  • app/main.f90 was removed. The test_the_machine() subroutine is now called by fpm test.
  • The routines add_major_chord() and add_minor_chord() in the music module (replaced by add_chord()).

Fixed

  • A bug in add_karplus_strong().

[ForSynth 0.2 "Daft Punk"] 2021-02-23

Added

  • forsynth module:
    • copy_section()
    • clear_tracks()
  • music module:
    • add_note() to generate a note with a sum of harmonics.
    • add_major_chord()
    • add_minor_chord()
  • demos module:
    • demo1()
    • demo2()
    • demo3()
  • envelopes module: ADSR_envelope() function
  • signals module:
    • add_karplus_strong() for plucked strings
    • add_square_wave()
    • add_sawtooth_wave()
    • add_triangle_wave()
    • add_noise()
  • sound_effects module:
    • apply_delay_effect()
    • apply_fuzz_effect()
    • apply_tremolo_effect()
    • apply_autopan_effect()

Changed

  • add_sinusoidal_signal has been renamed add_sine_wave, on the same model as the other waveforms.

[ForSynth 0.1 "Stockhausen"] 2021-02-19

Added

  • Initial commit.

Changed

  • Translated from the C version (2014-07-26).