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Korean Learning TUI Project - Development Summary

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Korean Learning TUI Project - Development Summary

Date: October 10, 2025
Status: Voice Output Working, Windows Setup Ready
Next: Voice Input Implementation on Windows

🎯 Project Overview

Korean language learning platform with voice-enabled TUI interface, AI conversation, and interactive games.

tui_landing tui_interaction tui_image2 tui_image1 tui_game

✅ Completed Features

🔊 Voice Output (Working)

Text-to-Speech: espeak Korean pronunciation through headphones
Audio Feedback: Voice responses in vocabulary games
Korean Pronunciation: Automated speaking of Korean text
Multi-fallback TTS: espeak, pyttsx3, system TTS support

🎮 Interactive Learning Platform

Vocabulary Games: Audio-enhanced word matching with score tracking
AI Conversation: Korean Knowledge Base integration at localhost:8201
Learning Modules: Grammar, vocabulary, pronunciation guides
Rich TUI Interface: Textual framework with tabs, buttons, logs

🖥️ Cross-Platform Support

Linux/WSL: Working with audio limitations (TTS only)
Windows: Optimized requirements for Python 3.14
API Integration: Korean Knowledge Base backend communication

❌ Known Issues

🎤 Voice Input Limitations

WSL Environment: ALSA driver conflicts prevent microphone access
Hardware Access: “No Default Input Device Available” in containerized environment
PyAudio Issues: Cannot initialize microphone in current Linux setup

🔧 Technical Challenges

Audio Pipeline: Input blocked, output functional
Environment Constraints: Docker/WSL isolation from hardware
Dependencies: Complex audio library requirements

📁 Key Files Created

🎵 Voice Components

scripts/korean_voice_utils.py - TTS utility functions
scripts/test_voice_with_headphones.py - Audio testing
scripts/korean_learning_tui_with_voice.py - Main TUI with voice

🔧 Windows Setup

requirements-windows.txt - Python 3.14 optimized dependencies
setup_windows.py - Automated Windows installation script
WINDOWS_SETUP_GUIDE.md - Comprehensive setup instructions
launch_korean_tui.bat - Windows launcher script

🏗️ Fixed TUI Versions

scripts/kor2unity_advanced_tui_fixed_minimal.py - API endpoint fixes
scripts/working_korean_tui.py - Stable version without voice
scripts/complete_korean_learning_tui.py - Full-featured attempt

🔄 Current Architecture

Korean Learning Pipeline:
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   User Input    │───▶│  Korean AI API  │───▶│  Voice Output   │
│  (Text/Voice)   │    │  (localhost:8201│    │   (espeak)      │
└─────────────────┘    └─────────────────┘    └─────────────────┘
        │                       │                       │
        ▼                       ▼                       ▼
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│  Textual TUI    │───▶│ Learning Games  │───▶│   Headphones    │
│   Interface     │    │  & Activities   │    │  (User Hears)   │
└─────────────────┘    └─────────────────┘    └─────────────────┘

🎧 KOREAN LEARNING VOICE PIPELINE DIAGRAM
═══════════════════════════════════════════════════════════════

INPUT PIPELINE (Voice Recognition):
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│   🎤 Physical   │───▶│  🔌 ALSA Audio  │───▶│  💻 PyAudio     │
│   Microphone    │    │     Driver      │    │   Interface     │
│   (Hardware)    │    │   (System)      │    │  (Python)       │
└─────────────────┘    └─────────────────┘    └─────────────────┘
        ✅                      ❌                      ❌
    Available              Missing/Broken         "No Default Input
   (Hardware)             (WSL Environment)       Device Available"
                                │
                                ▼
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│ SpeechRecognition│───▶│  🌐 Google API  │───▶│  📝 Korean Text │
│   Library        │    │  Speech-to-Text │    │    Output       │
│   (Python)       │    │   (Cloud)       │    │                 │
└─────────────────┘    └─────────────────┘    └─────────────────┘
        ✅                      ✅                      ❌
   Installed & Ready        Available              Can't reach due
                                                  to mic failure

OUTPUT PIPELINE (Text-to-Speech):
┌─────────────────┐    ┌─────────────────┐    ┌─────────────────┐
│  📝 Korean Text │───▶│  🗣️ espeak TTS  │───▶│  🔊 Audio Out   │
│     Input       │    │    Engine       │    │  (Headphones)   │
│                 │    │   (System)      │    │                 │
└─────────────────┘    └─────────────────┘    └─────────────────┘
        ✅                      ✅                      ✅
    Working Text            espeak Installed       Working through
     Processing             & Functional           your headphones

CURRENT IMPLEMENTATION STATUS:
══════════════════════════════════════════════════════════════

✅ WORKING FEATURES:
├── 🔊 Voice OUTPUT (Text-to-Speech)
│   ├── espeak Korean pronunciation
│   ├── Korean word/phrase playback  
│   ├── Audio feedback in games
│   └── Headphone audio output
│
├── 🎮 Interactive Games with Audio
│   ├── Vocabulary games with pronunciation
│   ├── Audio feedback for correct/incorrect
│   └── Korean phrase repetition
│
└── 💬 AI Conversation with TTS
    ├── Korean AI responses
    ├── Auto-speak Korean text
    └── Manual replay of responses

❌ NOT WORKING FEATURES:
├── 🎤 Voice INPUT (Speech Recognition)
│   ├── Microphone access blocked
│   ├── ALSA driver issues in WSL
│   ├── "No Default Input Device Available"
│   └── PyAudio cannot initialize mic
│
└── 🗣️ Real-time Pronunciation Assessment
    ├── Cannot capture user speech
    ├── Cannot compare pronunciation
    └── Cannot provide live feedback

Technical Breakdown:

Voice INPUT Pipeline (BROKEN ❌):

User Speech → Microphone → ALSA → PyAudio → SpeechRecognition → Google API → Korean Text
     ✅           ✅         ❌        ❌            ✅              ✅           ❌

Problem Location: ALSA audio system in WSL environment cannot access hardware microphone properly.

Voice OUTPUT Pipeline (WORKING ✅):

Korean Text → espeak TTS → Audio System → Headphones → User Hearing
     ✅           ✅           ✅            ✅           ✅

What’s Actually Available: ✅ WORKING Voice Features:

TTS Output: Korean pronunciation through headphones
Audio Learning: Vocabulary games with spoken Korean
Voice Feedback: Audio responses for learning activities
Pronunciation Playback: Hear correct Korean pronunciation
❌ BLOCKED Voice Features:

Speech Input: Cannot capture user's voice
Pronunciation Assessment: Cannot analyze user pronunciation
Voice Commands: Cannot accept spoken instructions
Real-time Conversation: Cannot have spoken dialog
Current Workaround in TUI:
The Korean learning TUI currently implements:

"Simulated Voice Input" - User types what they would speak
Full Voice Output - System speaks Korean through headphones
Audio-Enhanced Learning - Games and lessons with pronunciation
Text-based Interaction - Chat interface with audio responses
Why Voice Input Fails:
WSL Environment: Limited hardware access to audio devices
ALSA Configuration: Missing sound card configuration
Docker/Container: Isolated from host audio drivers
Development Environment: Not optimized for microphone access
Solution Options:
Current Approach (Recommended): Use TTS output + text input
Native Linux: Run on actual Linux machine with proper audio
Windows Host: Use Windows-native Python with microphone access
Cloud Recording: Upload audio files for processing

🎯 Next Steps

🎤 Priority 1: Voice Input on Windows

Install Python 3.14 on Windows host
Use requirements-windows.txt for dependencies
Test microphone access with SpeechRecognition
Implement real-time pronunciation assessment

🔄 Priority 2: Integration Testing

Verify Korean Knowledge Base API connectivity
Test complete voice pipeline (input + output)
Validate cross-platform compatibility
Performance optimization

📚 Priority 3: Enhanced Learning Features

Advanced pronunciation scoring
Progress tracking and analytics
Spaced repetition algorithms
Community features and sharing

🛠️ Development Environment

🐧 Current (Linux/WSL)

Python: 3.13+ with miniconda
Audio Output: espeak (working)
Audio Input: Blocked by ALSA/driver issues
API Backend: Korean Knowledge Base at localhost:8201

🪟 Target (Windows Host)

Python: 3.14 stable
Audio System: Native Windows audio APIs
Voice Libraries: pyttsx3, SpeechRecognition, pyaudio
Microphone Access: Full hardware access

📊 Testing Results

✅ Working Components

Korean text rendering in TUI ✓
AI conversation responses ✓
Voice output through headphones ✓
Vocabulary games with scoring ✓
API communication ✓

⚠️ Needs Work

Voice input recognition ❌
Real-time pronunciation feedback ❌
Cross-platform audio consistency ⚠️

🎓 Learning Outcomes

Successfully implemented modern TUI framework with voice capabilities, Korean language processing, and AI integration. Identified audio system limitations in containerized environments and created Windows-optimized solution.

Status: Ready for Windows voice input implementation
Contact: Continue development on Windows host for full voice functionality