home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Global Amiga Experience
/
globalamigaexperience.iso
/
music
/
composing
/
fractal musiclab
/
read_me
< prev
next >
Wrap
Text File
|
1995-07-10
|
12KB
|
305 lines
Welcome to the Fractal MusicLab DEMO....!
This file contains program operational information, some information
regarding the included MIDI and SMUS examples, and ordering
information. We hope you enjoy this DEMO, but in any case, we
would love to hear any suggestions or comments you have.
This program DEMO is similar to the commercial product with the
exceptions that all Save functions have been disabled.
Please call us with any questions or comments at (414) 733-6863,
or direct them to the address below.
If you wish to purchase this program, just sent a check or money
order for $89 + $4 S&H (in U.S.) to:
Digital Expressions Research
W6400 Firelane 8
Menasha, WI 54952
We will also be happy to send it COD (US only!).
***** About Fractal MusicLab *****
Fractal MusicLab is a unique algorithmic music composition program
that produces organized musical structure from fractals. You
compose original music sequences by generating a fractal structure,
and then selecting and applying specific musical elements to that
structure. Creating novel and appealing music can be as simple as
pressing a few buttons, or as complex as your time and creative
energy allow!
Fractals are infinitely detailed mathematical objects which often
exhibit a hierarchical organization resulting in the characteristic
property "self-similarity". Self-similarity implies that the fractal shapes
we see are similar, exactly or statistically, at any arbitrary
magnification level. Self-similar fractal structures are musically
interesting because they are analogous to the familiar "theme and
variations" structure found in most music. We have found that
Fractal MusicLab can produce surprisingly beautiful and appealing
compositions.
Fractal MusicLab is capable of generating an infinite number of
self-similar fractal scores by using Iterated Function Systems and IFS
Codes. Iterated Function Systems are a relatively flexible and
user-friendly means for generating and editing fractals. However, if
you do wish to compose music from non-IFS fractals, Fractal
MusicLab allows you to convert ILBM images into music sequences.
***** Program Description *****
Music composition with Fractal MusicLab consists of two basic opera
tions; rendering a musical "Score" from an IFS Code and generating
a sequence from that Score. Numerous options exist in the various
windows to control each compositional step. The program has been
designed, however, with sufficient defaults to allow performance of all
major program operations from almost any point in the program by
using menu selections and Hot Keys. You can literally load, edit, or
create a new IFS Code, render the Score, and generate and save a
sequence from the opening window.
The main menu allows loading and saving of all the various data files
types used by the program. "Hot Keys" are defined for initiating all
program operations.
The key to understanding Fractal MusicLab is understanding the vari
ous types of data used by the program. There are five basic data
types: IFS Codes, Scores, Sequences, Filters, and Presets. In addi
tion, the displayed Image can be manipulated separately from, but
similarly to, the Score, i.e. loaded, saved, or used to generate musi
cal sequences. Each data type is described below; additional in
formation will be found in the tutorials.
IFS Codes
Iterated Function Systems produce images by iteration, repeatedly
calculating the value of a mathematical function using the result of
the previous calculation as input for the current calculation. In this
program, the Iterated Function Systems consist of affine transforms,
usually between 2 - 20 , each one having an associated probability.
In two dimensions each transform in the IFS can be represented by 6
coefficients and a probability. All the coefficients for all the trans
forms comprise the IFS Code. Fractal MusicLab also saves the
probability as part of the IFS Code. Each IFS Code compactly repre
sents a unique musical composition!
Score
The Score forms the basis of most program compositional activities
and is actually a large underlying data array which contains the re
sults of the IFS Code iterations. A Score array value increments
each time the result of an iteration falls within the array's "cell limits".
The Score "screen image" displays a color based on the ratio of that
cell's value to the maximum cell value.
At large numbers of iterations, above 1-2 million iterations, the Score
converges to the attractor of the mathematical function represented
by the IFS Code, and a unique measure representing the density of
"hits" on the attractor.
The overall Score Limits, which determine the values mapped into
the Score array, can be automatically set such that the attractor fully
fits within the Score (Screen Display), or such that the Score only
uses a selected portion of the total attractor. Saving Scores also
saves these limits. This allows you to reload a Score and its IFS
Code at a later time and continue iteration.
The Score always spans the MIDI pitch range 0 - 119 (C0 to B9) for
640 time units, regardless of how the display is scaled relative to the
IFS Code. The actual duration value of the Score time units, quarter
note, eight note, etc., is user determined but is initially set to a
quarter note.
Images
The display image can be used in a manner generally similar to the
Score except that there is no underlying data array. Each transform
is assigned a display color. The principle use of generating
sequences from ILBM images is to allow use of other non-IFS fractal
types for composition.
Sequence
Sequences are time-ordered lists of notes that are loaded from disk
or generated from a score. Fractal MusicLab supports up to 16
instruments per sequence. Each instrument can play over either
MIDI or Amiga internal audio.
Filters
Fractal MusicLab allows you to define pitch filters which control which
note pitches can be produced when a sequence is generated. All
filters are defined relative to a 'C' root.
Presets
A preset is a set of pitch filters for each of the 16 separate sequence
parts. Presets are always applied relative to a 'root'; the default root
of all pitch filters in a preset is 'C'. This root can be changed in the
Preset Window. Fractal MusicLab allows user definition, saving, and
loading of Presets 1 to 32. Preset 0 is a default preset allowing all
note pitches; it can not be edited.
A preset, either a user defined preset or the default preset, is in effect
whenever a sequence is generated or the Score/image is played.
You may toggle among presets and roots while playing the
Score/Image to create a real-time performance.
Main Menu
The Main Menu consists of 4 menus including Project, Data_Files,
Windows, and Undo. This menu is attached to almost all of the pro
gram windows except the Note Editing Window. This later window
has its own menus. Access these main menus by clicking and hold
ing the right mouse button.
Most of the menu selections in the Project and Data_File menus are
self-explanatory and are primarily for loading or saving files. When
loading IFS Codes, Scores, or Filters from these menus, the previous
data is first removed. If you wish to append additional data, use the
LOAD gadgets in the IFS Code Window (F7), Score Generation Win
dow (F6), and Filters Window (F9) respectively.
The Windows menu provides direct access to the major program win
dows and lists the "Hot Key" equivalent.
The Undo menu is used only for undoing the last operation on a
Score. When working with the screen image, "Undo" has no effect.
Hot Keys
The following Hot Keys have been defined to provide single key
stroke initiation of certain program actions..
Function keys
F1 Open Sequence Manager Window
F2 Open Orchestration Window
F3 Open Note Editor
F4 Open Sequence Generation Window
F5 Open Seq. Generation Preferences Window
F6 Open Score Generation Window
F7 Open IFS Code Window
F8 Open Preset Selection Window
F9 Open Preset Editor and Filter Def. Windows
F10 Open Player Window
Numeric Keypad
(* ) Start/Stop IFS Code "test" mode
(-) Select previous transform
(+) Select next transform
(Enter) Toggle IFS Code Graphic edit mode
Keyboard
A Add transform to IFS Code
D Delete selected IFS Code transform
E Open Score Limits Edit Window
L Load Sequence
N Creates new sequence and opens Note Editor
P Open Color Palette Editor
O Optimize IFS Code Score Limits
S Set Score/Images as active sequence
(Return) Starts/Stops Play of selected sequence
(Space Bar) Starts/Stops rendering of IFS Code
(Tab) Start/Stop IFS Code "test" mode
(Arrow Up) Move IFS Code image up
(Arrow Down) Move IFS Code image down
(Arrow Left) Move IFS Code image left
(Arrow Right) Move IFS Code image right
***** Examples *****
MIDI examples
The MIDI examples have been "orchestrated" for General MIDI with
the rhythm/drums on channel 10. The drums follow a standard
Roland GS drum preset map (Preset 0). The General MIDI
Preset/Patch names are shown below should you need to
re-orchestrate the examples.
Please note that Fractal MusicLab uses patch numbers 0 to127;
rather than 1 to 128 per General MIDI; therefore the patch number in
Fractal MusicLab is one less than its corresponding General MIDI
patch number: Fractal MusicLab patch = GM patch number - 1.
patch # patch #
1 Piano 1 2 Piano 2
3 Piano 3 4 Honkey-Tonk
5 E. Piano 1 6 E. Piano 2
7 Harpsichord 8 Clavinet
9 Celesta 10 Glockenspiel
11 Music Box 12 Vibraphone
13 Marimba 14 Xylophone
15 Tubular-Bell 16 Dulcimer
17 Organ 1 18 Organ 2
19 Organ 3 20 Church Organ
21 Reed Organ 22 Accordian
23 Harmonica 24 Bandeon
25 Acoustic Gt - Nylon 26 Acoustic Gt - Steel
27 Elec Gt. - Jazz 28 Elec Gt - Clean
29 Elec Gt - Muted 30 Overdrive Gt
31 Distortion Gt 32 Gt Harmonics
33 Acoustic Bass 34 Elec Bass - Fingered
35 Elec Bass - Picked 36 Fretless Bass
37 Slap Bass 1 38 Slap Bass 2
39 Synth Bass 1 40 Synth Bass 2
41 Violin 42 Viola
43 Cello 44 Contrbass
45 Tremolo Strings 46 Pizzicato Strings
47 Harp 48 Timpani
49 String Ensemble 50 Slow Strings
51 Synth Strings 1 52 Synth Strings 2
53 Choir Aahs 54 Voice Oohs
55 Synth Voice 56 Orchestra Hit
57 Trumpet 58 Trombone
59 Tuba 60 Muted Trumpet
61 French Horn 62 Brass Ensemble
63 Synth Brass 1 64 Synth Brass 2
65 Soprano Sax 66 Alto Sax
67 Tenor Sax 68 Baritone Sax
69 Oboe 70 English Horn
71 Bassoon 72 Clarinet
73 Piccolo 74 Flute
75 Recorder 76 Pan Flute
77 Bottle Blow 78 Shakuhachi
79 Whistle 80 Ocarina
81 Square Wave 82 Saw Wave
83 Synth Calliope 84 Chiffer Lead
85 Charang 86 Solo Voice
87 Fifths 88 Bass & Lead
89 Fantasia/New Age 90 Warm Pad
91 Polysynth 92 Space Voice
93 Bowed Glass 94 Metal Pad
95 Halo Pad 96 Sweep Pad
97 Ice Rain 98 Soundtrack
99 Crystal 100 Atmosphere
101 Brightness 102 Goblin
103 Echo Drops 104 Star Theme
105 Sitar 106 Banjo
107 Shamisen 108 Koto
109 Kalimba 110 Bag Pipe
111 Fiddle 112 Shanai
113 Twinkle Bell 114 Agogo
115 Steel Drums 116 Woodblock
117 Taiko 118 Melody Tom
119 Synth Drum 120 Reverse Cymbal
121 Gt Fret Noise 122 Breath Noise
123 Seashore 124 Bird
125 Telephone 126 Helicopter
127 Applause 128 Gun Shot
SMUS Examples
All SMUS examples use IFF 8SVX instruments which are located in
the Instrument (dirs) on the disk. Of course these examples can
also be played over MIDI.