Readme and technical documentation

README.md

@@ -1,73 +1,58 @@
-# React + TypeScript + Vite
+# Sheet Music Trainer
 
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+A web-based application designed to help musicians practice sight-reading and ear training. It listens to your instrument (or voice) via the microphone and gives real-time feedback.
 
-Currently, two official plugins are available:
+[Live Demo](https://9x.github.io/sheetmusictrainer/) (If available)
 
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
+## Features
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
 
-## React Compiler
+-   **Sight Reading Mode**: Read notes from the interactive staff and play them on your instrument. The app listens and confirms when you hit the correct note.
+-   **Ear Training Mode**: Listen to a reference note and try to reproduce it.
+-   **Real-time Pitch Detection**: Uses your device's microphone to detect notes instantly.
+-   **Instrument Support**: Optimized for Guitar and Piano, with configurable tunings for guitar.
+-   **Virtual Instruments**: On-screen interactive guitar fretboard and piano keys for visual reference or touch input.
+-   **Customizable**: Adjust difficulty (range, accidentals), key signatures, rhythm/metronome settings, and more.
+-   **Zen Mode**: Distraction-free practice interface.
 
-The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+## Getting Started
 
-## Expanding the ESLint configuration
+### Prerequisites
 
-If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+-   Node.js (v18 or higher recommended)
+-   npm
 
-```js
+### Installation
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
 
-      // Remove tseslint.configs.recommended and replace with this
+1.  Clone the repository:
-      tseslint.configs.recommendedTypeChecked,
+    ```bash
-      // Alternatively, use this for stricter rules
+    git clone https://github.com/9x/sheetmusictrainer.git
-      tseslint.configs.strictTypeChecked,
+    cd sheetmusictrainer
-      // Optionally, add this for stylistic rules
-      tseslint.configs.stylisticTypeChecked,
-
-      // Other configs...
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
     ```
 
-You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+2.  Install dependencies:
-
+    ```bash
-```js
+    npm install
-// eslint.config.js
-import reactX from 'eslint-plugin-react-x'
-import reactDom from 'eslint-plugin-react-dom'
-
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-      // Enable lint rules for React
-      reactX.configs['recommended-typescript'],
-      // Enable lint rules for React DOM
-      reactDom.configs.recommended,
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
     ```
+
+3.  Run the development server:
+    ```bash
+    npm run dev
+    ```
+
+4.  Open your browser and navigate to the local URL provided (usually `http://localhost:5173`).
+
+## Technical Details
+
+100% vibe coded using Google Antigravity and Gemini 3 pro.
+
+This project is built with:
+-   React + TypeScript
+-   Vite
+-   VexFlow (for music notation)
+-   Pitchfinder (for audio detection)
+
+For more details on the architecture, see [TECHNICAL_REALIZATION.md](./TECHNICAL_REALIZATION.md).
+
+## License
+
+MIT

TECHNICAL_REALIZATION.md

@@ -0,0 +1,48 @@
+# Technical Realization
+
+## Architecture Overview
+
+The **Sheet Music Trainer** is a client-side Single Page Application (SPA) built with **React** and **TypeScript**, powered by **Vite**. It is designed to run entirely in the browser without a backend server, allowing for low-latency audio processing and interactivity.
+
+### Key Architectural Choices
+
+1.  **Component-Based UI**:
+    - The application is structured into reusable components (e.g., `SheetMusic`, `Fretboard`, `PianoKeys`, `Controls`) to maintain separation of concerns.
+    - State management is primarily handled via React's `useState` and `useReducer` at the `App` component level, with props drilling for simpler hierarchies.
+
+2.  **Audio Processing**:
+    - **Pitch Detection**: Utilizes the `pitchfinder` library (YIN algorithm) to detect pitch from the user's microphone in real-time. This processing happens in a dedicated hook/worker to keep the main thread responsive.
+    - **Audio Synthesis**: Uses standard Web Audio API for generating simple tones (sine/triangle waves) for playback and feedback.
+
+3.  **Music Rendering**:
+    - **VexFlow**: The standard library for rendering music notation on the web. It is used in the `SheetMusic` component to draw the staff, notes, clefs, and key signatures dynamically based on the current state.
+
+4.  **Responsiveness**:
+    - The application uses CSS variables and media queries to adapt to different screen sizes, with specific optimizations for mobile landscape mode to support instrument practice on tablets and phones.
+
+## Frameworks and Libraries
+
+### Core
+*   **[React](https://react.dev/)**: The library for web and native user interfaces.
+*   **[TypeScript](https://www.typescriptlang.org/)**: Strongly typed JavaScript for safer development.
+*   **[Vite](https://vitejs.dev/)**: Next Generation Frontend Tooling for fast development and building.
+
+### Audio & Music
+*   **[VexFlow](https://www.vexflow.com/)**: A JavaScript library for rendering music notation and guitar tablature.
+*   **[Pitchfinder](https://github.com/peterkhayes/pitchfinder)**: A collection of pitch detection algorithms for Javascript. used for detecting the note played by the user.
+
+### UI & Icons
+*   **[Lucide React](https://lucide.dev/)**: A clean and consistent icon library for the interface.
+
+## Directory Structure
+
+```
+src/
+├── components/       # Reusable UI components (SheetMusic, Fretboard, etc.)
+├── hooks/            # Custom React hooks (usePitchDetector, useAudioPlayer, etc.)
+├── music/            # Music logic, tuning definitions, and note utilities
+├── styles/           # Global styles and component-specific CSS
+├── assets/           # Static assets
+├── App.tsx           # Main application logic and layout
+└── main.tsx          # Entry point
+```

src/App.css

@@ -511,6 +511,28 @@ button {
   color: var(--color-text-muted);
 }
 
+.link-button {
+  background: none;
+  border: none;
+  padding: 0;
+  color: var(--color-primary);
+  cursor: pointer;
+  font-family: inherit;
+  font-size: inherit;
+  text-decoration: none;
+  transition: color 0.2s;
+}
+
+.link-button:hover {
+  color: var(--color-primary-dark);
+  text-decoration: underline;
+}
+
+.separator {
+  margin: 0 8px;
+  color: #666;
+}
+
 .app-subtitle a {
   color: var(--color-primary);
   text-decoration: none;

src/App.tsx

@@ -2,6 +2,7 @@ import { useState, useEffect, useCallback, useMemo } from 'react';
 import { SheetMusic } from './components/SheetMusic';
 import { Controls, type AppSettings } from './components/Controls';
 import { SettingsModal } from './components/SettingsModal';
+import { OpenSourceModal } from './components/OpenSourceModal';
 import { usePitchDetector } from './hooks/usePitchDetector';
 import { useMetronome } from './hooks/useMetronome';
 import { useAudioPlayer } from './hooks/useAudioPlayer';
@@ -66,6 +67,7 @@ function App() {
   const [revealed, setRevealed] = useState(false);
   const [virtualNote, setVirtualNote] = useState<number | null>(null);
   const [isSettingsOpen, setIsSettingsOpen] = useState(false);
+  const [isOpenSourceModalOpen, setIsOpenSourceModalOpen] = useState(false);
 
   const currentTuning = TUNINGS[settings.tuningId];
   const currentInstrumentDef = INSTRUMENT_DEFINITIONS[settings.instrument];
@@ -575,6 +577,10 @@ function App() {
             currentPitch={pitchData ? { note: pitchData.note, cents: pitchData.cents } : null}
           />
           <div className="app-subtitle">
+            <button className="link-button" onClick={() => setIsOpenSourceModalOpen(true)}>Open Source Libraries</button>
+            <span className="separator">•</span>
+            <a href="https://github.com/9x/sheetmusictrainer" target="_blank" rel="noopener noreferrer">GitHub</a>
+            <span className="separator">•</span>
             <a href="http://jensmohrmann.de" target="_blank" rel="noopener noreferrer">jensmohrmann.de</a>
           </div>
         </footer>
@@ -633,6 +639,11 @@ function App() {
         settings={settings}
         onUpdateSettings={setSettings}
       />
+
+      <OpenSourceModal
+        isOpen={isOpenSourceModalOpen}
+        onClose={() => setIsOpenSourceModalOpen(false)}
+      />
     </div >
   );
 }

src/components/OpenSourceModal.tsx

@@ -0,0 +1,48 @@
+import React from 'react';
+import { X } from 'lucide-react';
+import '../styles/OpenSourceModal.css';
+
+interface OpenSourceModalProps {
+    isOpen: boolean;
+    onClose: () => void;
+}
+
+const LIBRARIES = [
+    { name: 'React', url: 'https://react.dev/', description: 'The library for web and native user interfaces' },
+    { name: 'TypeScript', url: 'https://www.typescriptlang.org/', description: 'JavaScript with syntax for types' },
+    { name: 'Vite', url: 'https://vitejs.dev/', description: 'Next Generation Frontend Tooling' },
+    { name: 'VexFlow', url: 'https://www.vexflow.com/', description: 'Music notation rendering for the web' },
+    { name: 'Pitchfinder', url: 'https://github.com/peterkhayes/pitchfinder', description: 'Pitch detection algorithms' },
+    { name: 'Lucide React', url: 'https://lucide.dev/', description: 'Beautiful & consistent icon toolkit' },
+];
+
+export const OpenSourceModal: React.FC<OpenSourceModalProps> = ({ isOpen, onClose }) => {
+    if (!isOpen) return null;
+
+    return (
+        <div className="modal-overlay" onClick={onClose}>
+            <div className="modal-content open-source-modal" onClick={e => e.stopPropagation()}>
+                <div className="modal-header">
+                    <h2>Open Source Libraries</h2>
+                    <button className="close-button" onClick={onClose} aria-label="Close">
+                        <X size={24} />
+                    </button>
+                </div>
+
+                <div className="modal-body">
+                    <p>This project relies on these amazing open source libraries:</p>
+                    <ul className="library-list">
+                        {LIBRARIES.map((lib) => (
+                            <li key={lib.name} className="library-item">
+                                <a href={lib.url} target="_blank" rel="noopener noreferrer" className="library-name">
+                                    {lib.name}
+                                </a>
+                                <span className="library-desc">{lib.description}</span>
+                            </li>
+                        ))}
+                    </ul>
+                </div>
+            </div>
+        </div>
+    );
+};

src/styles/OpenSourceModal.css

@@ -0,0 +1,48 @@
+.open-source-modal {
+    max-width: 500px;
+    width: 90%;
+}
+
+.library-list {
+    list-style: none;
+    padding: 0;
+    margin: 0;
+    display: flex;
+    flex-direction: column;
+    gap: 16px;
+}
+
+.library-item {
+    display: flex;
+    flex-direction: column;
+    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
+    padding-bottom: 12px;
+}
+
+.library-item:last-child {
+    border-bottom: none;
+}
+
+.library-name {
+    font-weight: 600;
+    color: #646cff;
+    /* Vite purple or accent color */
+    text-decoration: none;
+    font-size: 1.1rem;
+    margin-bottom: 4px;
+}
+
+.library-name:hover {
+    text-decoration: underline;
+}
+
+.library-desc {
+    color: #ccc;
+    font-size: 0.9rem;
+}
+
+@media (prefers-color-scheme: light) {
+    .library-item {
+        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
+    }
+}