Musical fountains

Musical fountains

Principles of show design, coordination of water and light and music, equipment selection and performance evaluation

A musical fountain is a combination of engineering and performance art. In this type of fountain, water movement, light changes and musical structure are placed in a common schedule to form a coherent show. The quality of the result depends on the coordination between the architectural design, the actual power of the equipment, the programming of the show and the viewing conditions of the audience.

Musical fountain can be performed in a city square, park, lake, tourist complex or commercial center. In each of these situations, the goal and the design approach are different: a field needs readability from a distance; A commercial center may want short, frequent displays; And a tourist complex can turn its main performance into a nightly and timed program.

This chapter explains the process of transforming a demonstration idea into a workable and usable system. Detailed hydraulic calculations, pump selection, electrical protection and control network design are reviewed in specialized chapters of the book.

7–1. When is a fountain truly musical?

The presence of a speaker next to a fountain does not mean that it is musical. The main feature of the musical fountain is the existence of a designed relationship between music and the behavior of water and light.

This connection is usually established in one of two ways:

The combination of these two methods is also possible; For example, the main structure of the show can be designed in advance and some of the lighting changes respond to the live sound.

In the project documents, the intended method should be clear. The general phrase "harmonized with music" does not specify how many exclusive performances the contractor must deliver, how the new music will be made possible, or how the quality of the harmony will be assessed.

In international products, the design of the show on the timeline and scheduled execution has a specific place; For example, OASE's WEPS software has been introduced to plan and visualize synchronized water, light and music shows. Source: OASE WEPS software ^[37]

7–2. Design begins with the experience of the viewer

Before determining the number of nozzles and the power of the pumps, it should be determined how the audience will see the show.

The main questions are:

• Does the viewer look from a specific front or move around the fountain?

• What is the usual viewing distance and what are the obstacles in the way?

• Is the display designed for a brief stop by passers-by or for a planned gathering?

• Is it important to perform during the day, night or both?

• Which parts of the campus should have adequate sound coverage?

• Do nearby users create time or audio restrictions?

These responses affect the height and placement of effects, speaker placement, lighting direction, and even music selection.

In an elongated fountain with spectators positioned on one side, the sequence of movement from left to right can be obvious. The same sequence in the water feature seen from all sides does not have the same visual meaning for all audiences. Therefore, the design of the display should be based on the actual viewing angles.

Figure note from the source manuscript

Figure 1–7: Wide shot of a musical fountain in the GSO archive, with the audience present and their distance from the fountain clearly defined. Suggested subtitle: "The arrangement of the effects and the scale of the show must be in harmony with the actual position of the audience." Insert the name of the project and the location after selecting the photo.

7–3. The main components of the musical fountain system

For a better understanding, the system can be examined in five sections:

In the introduction of GSO urban equipment, groups such as control and moving nozzles, lighting equipment and control systems can be seen. The selection of this equipment for each project should be done by checking the specifications of the same model, the compatibility of the components and the purpose of the display. Source: GSO fountain and urban equipment ^[38]

The important thing is that the quality of any part alone does not guarantee the final result. A suitable nozzle will not show its optimal performance in the case of improper hydraulic feeding or uncoordinated steering.

7–4. Selection of effects based on the dramatic role

Each effect should have a clear role in the overall composition. Simultaneous use of all equipment, throughout the performance, reduces the opportunity for the formation of differences between quiet and powerful moments.

For initial design, the following classification is useful:

This table is a design framework; The actual capability of each effect must be determined from the manufacturer's information and its testing.

For each group, it is better to prepare an "effect capability sheet". This sheet will include the permitted range of height, time to reach the desired state, limit of changes, sensitivity to wind, water requirement and maintenance requirements. The show designer must program in this range.

7–5. How does hydraulic architecture affect the freedom of display?

Two fountains with the same number of nozzles may have very different display capabilities. One of the main reasons is the way pumps and hydraulic circuits are divided.

Common pump and multiple control outputs

In this arrangement, several nozzles or groups of nozzles are fed from a common pump or circuit. Depending on the design, the valves can turn on or off the outputs.

Changing the status of one branch may change the pressure and flow of other branches. Therefore, the apparent independence of steering wheels does not necessarily mean hydraulic independence. Different combinations of open and closed outputs should be considered in design and performance testing.

Independent pump for nozzle or effect group

In this arrangement, the output control of each unit can be more flexible, but the number of electrical, control and maintenance equipment increases. Its choice depends on the dimensions of the project, the type of effect and the actual need of the show.

Combined makeup

In many designs, the background groups can be implemented with a common circuit and the index effects with independent circuits. This method is useful when the equipment segmentation is extracted from the display scenario.

To make quick changes, you can't just rely on the frequent power off and on of a regular pump. The pump, drive, valve and circuit must be selected for the type and speed of operation desired. Investigation of pressure transients and mechanical limitations is also a part of engineering design.

7–6. Music and show scenario

The choice of music should be done before finalizing the program. The version of the file, compilation, length of the piece and its starting point must be clear and fixed; Changing the music version after programming can disrupt the harmony of the performance.

In choosing the part, these factors are important:

• Suitability to the identity of the place and audience;

• The existence of recognizable parts for the visual development of the show;

• Appropriate period for the pattern of people's attendance;

• Audio file quality;

• Determining the status of public use and broadcasting rights.

The designer of the show should pay attention to the phrasing and changes of the music in addition to the beat. A gradual increase in the intensity of the music can be accompanied by a slow expansion of the effects; A pause can provide an opportunity to reduce water and light; And the return of the main theme can be represented by a familiar but wider composition.

The following example is just a training scenario for a two-minute demo:

This schedule must be rewritten for the actual part and has no independent contractual or technical value.

Figure note from the source manuscript

Figure 2–7: Timeline tutorial diagram with three rows “Music,” “Water Groups,” and “Light.” Sections of introduction, development, pause and climax should be specified. Suggested caption: "The show scenario defines the temporal relationship between the music and the behavior of the equipment." This image is schematic and cannot be attributed to a specific project.

7–7. time coordination; The difference between a command and an observable event

Commanding water and light at the same time does not necessarily produce a visual result at the same time.

After sending the command to a water effect, factors such as drive response, pump acceleration, valve movement, flow status and water movement to the desired point affect the observation time. This delay may not be the same for different effects and situations.

To illustrate, suppose in an experiment:

• The first effect reaches the visual state of the target 0.6 seconds after the command;

• The second effect reaches the desired time point 0.2 seconds after the command.

If the result of both is to be seen at a certain moment, the command of the first effect must be issued 0.4 seconds earlier than the second effect. These numbers are hypothetical; Actual latency should be measured on equipment and project circuitry.

The simple programming relationship is as follows:

Command issuing time = optimal time to observe the effect − measured delay of the effect

Also, in music with a speed of 120 beats per minute, the beat interval is equal to:

60 ÷ 120 = 0.5 seconds

If an effect needs more time to complete the desired movement, it will not be possible to execute it completely on every beat. You can expand the movement on several beats or choose a more suitable effect.

In large spaces, the time when the sound reaches different points also affects the sense of harmony. For this reason, viewing ranges or reference points must be defined for adjustment and evaluation.

7–8. Display control, DMX and RDM

In a musical fountain, the control system must operate the music, water and light based on a synchronized time reference. Setting up the music player and water controller separately, without a clear coordination mechanism, can reduce the repeatability of the display.

DMX512-A is one of the well-known control protocols in lighting and display equipment. The ANSI E1.11 standard defines the specifications of this connection. Its use in a fountain equipment depends on the existence of an interface and compatible capability in the same equipment. Source: Introduction to ANSI E1.11-2024 standard ^[39]

In preparing the control list, one should distinguish between "number of equipment" and "number of control channels". A fixture may use multiple channels for features such as intensity, color, movement, or fine-tuning. Therefore, the control capacity should be calculated from the sum of the actual equipment profiles.

RDM, according to the ANSI E1.20 standard, allows two-way communication for functions such as device identification, address setting, and receiving certain statuses and errors. Use of each feature is dependent on controller and device support. Source: Standard ANSI E1.20-2025 ^[40]

Getting the status of the device also does not prove by itself that the actual height or shape of the water is correct; Physical output measurement requires a suitable measurement method.

7–9. The relationship between display control and system protection

The performance of the show must be subject to the permitted operating conditions. Low water level, effective failure of equipment or inappropriate environmental conditions may limit the execution of a part of the program or the whole of it.

In the design, it should be specified:

• Which status only generates a warning;

• Which situation causes a decrease in output;

• which situation necessitates stopping a segment or the entire show;

• Return to work is automatic or requires operator review.

Demonstration command should not bypass necessary protection. Also, the use of PLC, DMX or an advanced software, alone does not mean to ensure safety; The protection architecture and the behavior of the equipment during the fault should be designed according to the risks of the project.

Safe status is also not the same for all components. For example, the method of stopping the water circuit should be compatible with its hydraulic behavior, and the status of treatment and support equipment should be defined separately.

Figure note from the source manuscript

Figure 3-7: Concept diagram including "Display program", "Light and water control", "Audio playback" and "Monitoring and protection". It should be shown that the permission to perform the show depends on the conditions of the work permit. Suggested subtitle: "Artistic harmony and technical conservation must work together in a specific architecture." This diagram is not a substitute for the electric power plan.

7–10. Wind, ambient light and sound

Outdoor display quality changes with environmental conditions. Wind can shift the path of water landing, reduce the readability of some effects, and send spray into spectator areas or walkways.

To manage this situation, it is better to define project-specific modes instead of a simple on or off decision; Such as normal performance, height reduction, removal of sensitive effects and show stop.

Thresholds for these modes should be determined based on fountain geometry, nozzle type, wind direction, surrounding area, and project testing. In order to avoid successive changes of states in fluctuating wind, the return logic and state stability must also be designed.

Day and night display may also require two different programs. During the day, the shape and movement of water play a more prominent role; At night, the combination of light and contrast with the background becomes more important.

In the audio section, the goal should be comprehensible and appropriate coverage in the viewing area. Placement and orientation of speakers, sound processing and environmental conditions should be checked; Increasing the audio power alone is not the solution to coverage uniformity.

7–11. Preview, prototyping and on-site tuning

3D model and preview help to check the arrangement of effects, viewing angle and display structure. In the design method of Crystal Fountains company, the use of visualization and physical prototyping tools is proposed for the development and evaluation of the design. Source: Fountain design process in Crystal Fountains ^[41]

However, some of the quality can only be appreciated with water and real equipment: sound effect, flow breaking, response delay, splash, light reflection and wind effect.

The proposed process includes these steps:

1. Preparation of scenario and initial placement; 2. Checking the capabilities and limitations of the equipment; 3. Preparing a preview to evaluate the visual composition; 4. Testing sensitive effects or uncertain combinations; 5. show planning; 6. Final setting on the installed system; 7. Evaluation of the actual location of the audience.

For a new effect or combination whose functionality is unclear, prototyping can reveal the problem before purchase or widespread implementation.

7–12. Delivery and acceptance criteria

Phrases like "beautiful presentation" or "perfect coordination" are not enough to deliver the project. Acceptance criteria should specify what, under what conditions and by what method will be evaluated.

Acceptance values should be determined according to the project. This table is a suggested framework for drafting documents and is not a substitute for standards or technical specifications of the contract.

Acceptance tests should also be recorded so that the result of delivery is not limited to the oral impression of people.

7–13. Delivery documents and the possibility of future development

After opening, the musical fountain needs content management and technical maintenance. The scope of delivery of software and files should be clear from the time of the contract.

The delivery package, depending on the contract, can include the following:

• Final drawings and identification of equipment;

• List of addresses and control channels;

• Executable files of the show and specific version of the music;

• editable files within the limits of agreed rights and licenses;

• Software version, license terms and necessary dependencies;

• Backup settings and recovery method;

• Operation, maintenance and error recording instructions;

• Operator and technical officer training.

In future development, the possibility of adding new views is not only dependent on having software. Authorized access, version compatibility, equipment information and programming skills are also important.

For the show library, it is better to record the name of the program, duration, version, change date and execution limit. This is especially necessary when several operators or contractors work with the system during the life of the project.

7–14. Maintaining display quality over time

Changing the direction of the nozzle, clogging of the path, loss of pump performance or reduction of light quality can change the planned composition; Even if the system still turns on and runs the program.

For this reason, in addition to the health of the equipment, the maintenance should also check the quality of the performance result. Periodically running a short reference program that activates the main groups can help compare the current state with the state recorded at delivery.

Capturing the image of the location and relatively constant conditions is useful for documentation; But technical measurement and equipment inspection will still be necessary.

Figure note from the source manuscript

Figure 4-7: Two actual views of a GSO project archive; Show overview and close-up view of setting up or servicing equipment. Suggested subtitle: "The stability of the display quality depends on the maintenance of the equipment and the review of the visual result." The photo of the service must show the true and correct conditions of the work.

The musical fountain becomes a sustainable attraction when the artistic design, technical capacity and exploitation power are in harmony with each other. Its value lies in the consistent and repeatable performance that the audience can experience over time.

In Chapter 8, rhythmic and control fountains are explored; Systems that use the sequence and programmed changes of water and light to create movement and can be part of the daily life of the urban space independently of the music.