Piano synth · gemini-2.5-flash

Output generated Cost / run $0.0078 Runtime 16.9s

Prompt for this run

Using the pre-provided tone.min.js (global Tone), build a playable piano keyboard controlled by mouse and computer keys that synthesizes notes with an ADSR envelope and visual key feedback.

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TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelgemini-2.5-flash

vendorGoogle

harnesspi-agent

generated2026-07-22

METRICS

runtime16.9s

tokens in4.4k

tokens out2.6k

cached0

cost / run$0.0078

Transcript · 4 messages

user

Using the pre-provided tone.min.js (global Tone), build a playable piano keyboard controlled by mouse and computer keys that synthesizes notes with an ADSR envelope and visual key feedback.

assistant

thinking

**Building Core Structure**

I'm focusing on establishing the foundational HTML for the project, specifically the `index.html` file. This will serve as the canvas for integrating the `tone.min.js` library, setting up the piano keyboard interface, and managing user interactions.

**Designing Interface Elements**

I'm currently sketching out the visual layout in `index.html`, aiming to build a dynamic piano keyboard. This includes defining the structural `div` containers that will house the individual keys, setting the stage for both mouse and keyboard interactions to drive the sound synthesis.

→ write index.html (6646 bytes)

toolResult

Successfully wrote 6646 bytes to index.html

assistant

thinking

**Implementing Piano Functionality**

I've successfully set up the `index.html` and styled the piano keys with distinct looks for white and black notes, plus an `.active` state for interaction. The JavaScript is now employing `tone.min.js` to construct a `Tone.Synth` with an ADSR envelope, and I'm dynamically generating elements.

**Finalizing Piano Implementation**

My thought process has concluded; the piano functionality is fully implemented. The HTML and CSS structure the visual interface, while JavaScript, leveraging Tone.js, handles note synthesis, keyboard mapping, and interaction feedback, completing the project.

I have successfully created the `index.html` file with the interactive piano keyboard. It includes inline CSS and JavaScript, uses `tone.min.js` (which is loaded from the current directory), and provides both mouse and keyboard control with visual feedback and ADSR envelope synthesis.