Audio & visualization
SIGINTTool: draw, hear, and export a signal
Bringing drawing, sound, mathematical inspection, and reusable exports into one browser workspace.
By Curtis Tech Solutions3 min read
A signal can be a shape on a screen, a sound, a set of numbers, or a function in code. Moving between those views often means moving between tools. SIGINTTool brings them into a shared browser workspace.
Curtis Tech Solutions built the project around a direct loop: draw a waveform, hear it, inspect its mathematical representation, and export the result. Canvas, Web Audio, browser workers, and local storage support the editing and rendering work without requiring a project upload to a server.
Start with a shape and hear the change
The waveform editor provides pencil, line, and erase tools, along with presets, snapping, zoom, and undo. A person can sketch an idea and adjust it visually rather than begin by writing an equation.
The workspace supports up to four oscillators, with separate lanes for pitch and volume. Keeping these controls distinct helps someone explore how a waveform and its behavior over time combine into the sound they hear.
For example, a user might start from a simple preset, redraw part of the wave, and listen before making another change. The immediate connection between drawing and playback makes the interface useful for exploring a signal’s behavior.
Make the math inspectable
SIGINTTool includes sine fitting, Fourier coefficients, error information, and overlays for inspecting a signal and its spectrum. Those views help connect the drawn shape to a representation that can be analyzed or reused.
A compact sine approximation and a detailed numerical representation serve different purposes. A short expression may be easier to read, while a numerical function can retain a more complicated drawing. Exposing fit information helps the user understand what an approximation leaves out.
This is a useful interface principle for technical tools: show the relationship between the input and the generated result. An export is more meaningful when the user can inspect how it represents the thing they created.
Keep projects close to the user
Projects are stored locally in the browser using IndexedDB. Soundboard pads can retain rendered audio together with editable snapshots, so a saved sound can remain connected to its source settings.
The tool also imports audio clips for trimming and further work, and provides JSON or ZIP project exports for portable backups. Browser storage can be cleared or reach its limits; a downloaded project file gives the user another copy they control.
For this kind of interactive workspace, local storage makes the project lifecycle part of the product: save a working idea, return to it, and carry it elsewhere when needed.
Export for the next tool
The export options include WAV audio, CSV data, JSON coefficients, and standalone JavaScript or Python functions. Different outputs support different next steps, from listening to a finished sound to using a generated signal inside another program.
For modulated or rendered output, generated functions use baked sample tables to reproduce the selected settings. They are a representation of that result; changing the effects calls for editing the project and rendering it again.
SIGINTTool shows how a browser application can join creative editing with technical inspection. Its useful unit of work is the whole cycle from an initial sketch to an understandable, reusable result.