Musical Notation for Computers

Sound

 

    Current Musical Notation is designed to be used by Performers playing musical instruments. An alternative notation is needed, when one wants to use computers to generate a sound file based on the set of instructions provided by a Composer.

When the composition requires use of a few speakers (for example personal stereo phones), information about location of speakers should be provided to the computer and it should generate a separate sound file for each speaker.

 

Instructions for Computer

The sound file should be created using a computer program specially developed for each particular composition. To write such computer programs, we need computer languages and compilers, which transform composer’s instructions into a computer program.

The combination of a chosen computer language and a chosen programming style, we will call Musical Notation. Thus we should expect a few variants of such Musical Notation intended to be used in conjunction with computers.

    This approach would require Composers to learn computer programming, which is considerable effort. However, such effort yields benefits of proficiency in computer programming and this opens up additional opportunities (demand for computer programming is growing).

It is in interests of Composers to select only a small number of computer languages and a small number of programming styles to be used as Musical Notation.

    Computer languages chosen to be a part of new Musical Notation should be chosen among languages, which knowledge is in great demand by industries. This opens more opportunities, and this assures their longevity, improvement of implementation of their compilers and healthy community of programmers using them. The most promising languages for such role are so called “object oriented” languages, which allow efficient description of various patterns and “objects” conforming to these patterns.

 

New Role of Performers

Currently, Composers create the general structure of the Music and Performers interpret it according to audience and circumstances. This cooperation between Composers and Performers worked well for a long time, and it makes sense to use it in this new way of Music creation and performance.

To open up the possibility for Performers to interpret and adjust the composition, we need to do two things.

First, we need to give Performers not a sound file, but a program, which generates it. The program should be produced using a compiler as described above.

Second, we need to develop this type of programs with some interface, which a Performer could use to adjust the output of such program to conditions of particular performance. Note that in many cases, simple configuration file would be sufficient to be used as an interface. Hence, what could be modified for a performance is defined by the Composer, who develops the program and its interface. The program itself is not designed to be modified.

     

Powerful Tools for Composers

Modern computer languages (especially object oriented languages), allow writing the program in terms similar to the way a person thinks, in terms of patterns, generic and specific. They should provide Composers with quicker way of writing the Music.

Note, that this way of Music development fits naturally in the way software is developed. Developers utilize ability of computers to transform conceptual description into unfolding in time execution and a configuration file is a natural feature of programs. Composers just need to transfer this experience into the area of Music composing.

 

Library of Basic Sounds

    The foundation of the musical composition is a set of basic sound patterns and basic ways of their manipulation.

 

Basic Sound Patterns

    A Composer constructs a composition using Sound Patterns, some of which are well known, some are created for that particular composition. For each particular place in the composition, he selects appropriate pattern and specifies its parameters. They are sound patterns, which are either well known or while not used broadly, used often by this particular Composer. These Sound Patterns are the basic tool of the Composer and they have to be collected in a special “library”, which could be reused – Basic Sound Patterns. These “libraries” could be shared and could accumulate quickly.

    For example, a broadly used Sound Pattern consists of three elements: initial sound intensity rump-up, a period of stable sound intensity (possibly with some degree of oscillation), and a period of reduction of sound intensity. This pattern should be combined with the pattern of characteristics of the sound. These characteristics could be given as a digital recording of the sound or as a set of frequencies of air vibration with their relative intensity, etc.

    In object oriented computer languages all this information is included in one “class”. In the same class we need to add some functions, which could be used to compute samples of digital representation of the sound corresponding to our settings of its parameters (how long, how loud, etc.).

    The collection of such patterns – the Library of Basic Sounds, is an important part in our new Musical Notation.

 

Patterns of “Overlapping” Sound Construction

    We should define a few patterns of simultaneous execution and sequential execution of Basic Sounds. These patterns we will provide as “classes” to which we pass parameters. Among these parameters we will have a list of classes (patterns of sound), which we want to be executed in prescribed manner.

For example we might want to have smooth transition from one sound to another in generation of the chain of sounds, using special rules of transition from one sound to another. Alternatively, we might want a few sound patterns to be executed in synchrony – start together and end together with similar rump-up and fading patterns.

These classes should be a part of the Library of Basic Sounds.

 

Execution Matrix and Time Markers

    In many musical performances, there are parallel coordinated streams of sounds. Usually, sounds of one stream have special characteristics, which allow their recognition as related. In an orchestra, they are sounds of one type of instruments. We will create imaginary instruments – groups of sounds with similar properties, i.e. they are easily recognized as related.

Coordination between different streams of sounds is done by dividing all sounds into blocks of sounds confined into strictly defined time intervals. These time intervals are reinforced with accents (even intensity execution of the majority of sounds and higher intensity execution of selected sounds).

    We need to have special tools to facilitate this type of organization of parallel streams of sounds. Since composing such coordinated streams is difficult, we need also special tools, which allow quick detection violation of this organization, while we are writing the music.

These two tasks could be accomplished with special classes - Execution Matrix and Time Markers.

We will define an object Sound Stream. The Sound Stream is a kind of collection, into which we add objects one-by-one. We will put in the Sound Stream Basic Sounds, and Pauses. As usual, each of these objects should have defined duration of execution. In addition, we will put in the Sound Stream special objects Time Markers, each one having a name. Time Markers will not be executed, they will be used to check coordination of the Sound Streams.

Sound Streams we will put into another collection – Execution Matrix.

We will put Time Markers with the same names in different Sound Streams and the computer will compute how much time it takes to reach them walking in different Sound Streams (including pauses). During the composing, we will ask the computer to report any mismatch of this sort. This is very similar to the way composing is done now and it is easy to learn. Practically, it is somewhat more complicated, because we need to compile the program and to specify in the Configuration File that we want to run this particular check, not to play the music, and the program will produce the file showing all places of mismatch, which it could find.

As one could see, Configuration File is a highly useful feature not only for Performers but also for Composers.

During generation of the sound files for performance, all Time Markers will be simply ignored.

We will generate digital sound file using Execution Matrix in a standard way: the computer will walk along the time-line with a small time-step (defined in the chosen format of the sound file). For each moment, it will compute values of intensity of sound in each Sound Stream and will add them up, that’s all.

 

Color

 

    Using Color-images the way we use sounds in Music, is a new undertaking and we rather rely on success of Music/sound and try to replicate it with Music/color. When spectators get accustomed with this new art form, it will expend naturally.

 

Color-Images

    One promising class of Color-images is presented in the “Beauty of Moving Color” (in this site). Each image occupies entire screen, it has an “anchor” point – a place where intensity of color is the highest, and from that point intensity drops quickly, when the gaze move from the “anchor” in any direction. Locations of anchor points we further limited to nodes of a few imaginary grids, which we put on the screen.

    As we put musical sounds (Sound-images) into a Library of patterns, we will put our “color images” into a Similar Library of patterns. A basic pattern in this library should be a set of such Color-images displayed simultaneously, with natural mixing of colors, rising in intensity quickly and in coordinated manner, staying for awhile on the screen and quickly fading in intensity also in coordinated manner. To remind harmonious accord of musical sound, colors of Color-images in the group should be harmonious also.

 

Supporting Tools

    As with Sound-images we will make a few classes to help us generate new Color-images by grouping of Color-images with either simultaneous execution or with smooth overlapping in time.

The Color Stream - the chain of Color-images, we will organize as a Sound Stream, using rhythmic division of their time intervals and accents (higher intensity of color for some Color-images in the Color Stream).

    We will use the Execution Matrix and Time Markers as we use for sounds. Only we add the Color Streams to it instead of Sound Streams.

    We will generate digital video file using Execution Matrix similar to the way we generate digital sound file: the computer will walk with the specified time-step and on a specified grid on the screen and add up colors of corresponding Color Streams. We could do that, because colors reproduced by a color monitor could be described with a set of three numbers, which should be added as vectors, when colors are mixed.

   

Sound and Color

    It is possible that, initially, combining sound and color could be easier to accept than moving color alone – familiar structuring of the Music/sound could support recognition of similar structuring of the Music/color.

    It is kind of obvious, how this could be done, from what is described above. However, we could use some programming trick, which is often used with object oriented programming. It is possible:

-   to define one type of Stream, where we could collect our sound objects and color-objects,

-   to define one type of Execution Matrix, where we could collect Sound Streams and Color Streams.

    In any case, technically, we have everything in place: we will place in the same Execution Matrix

 

New Music and Traditional Music

    This new way of creation and performing of Music will find its place among performing arts. The compositions could be performed in movie theaters with large electronic screens, and sophisticated sound systems. They will offer never seen before color performances and sound effects, like illusion of sound coming from the basement or from above the roof. Alternatively, this performance could be recorded as a movie and repeated many times in many places. From the other hand, one could enjoy these performances in intimate setting of own home.

    However, these performances will not provide immediate connectedness of the Performer and audience, small variations of performance in reaction to the audience, or even strong reaction of the Performer to the mood of the audience as a group.

    This Music should become a new art form, enriching, not replacing existing one.

 

Alexander Liss 11/30/2019