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KoljaB/README.md

I develop high-performance voice applications that run in real time, handle heavy workloads, and maintain stable, low-latency performance even at global scale.

Many developers already rely on my open-source libraries (like RealtimeSTT, RealtimeTTS and Linguflex) for accurate, responsive transcription and text-to-speech.

My services include:

  • Setting up end-to-end real-time speech recognition and TTS pipelines for multi-user, low-latency environments.
  • Implementing GPU optimization, load balancing, and runtime configuration for scaling under heavy traffic.
  • Integrating various TTS engines (e.g. Coqui, StyleTTS2, Azure, ElevenLabs, ... ) and fine-tuning them for quality and speed.
  • Applying sophisticated audio chunking, compression, and sentence logic to improve transcription accuracy and responsiveness.
  • Enabling real-time streaming via browser-based clients with stable, continuous, and natural-sounding output.
  • Integrating voice activity detection (VAD), wake-word recognition, and other advanced speech features.
  • Incorporating large language models to support streaming tool-calling, contextual responses, and dynamic memory or RAG workflows.
  • Offering reliable backend infrastructure advice, including containerization and orchestration (e.g. Modal, Runpod, Kubernetes) for global-scale operations.
  • Providing guidance on tuning parameters to ensure optimal audio quality, stable performance, and minimal latency.
  • Advising on training data and model selection to achieve fast, robust, and context-aware results in speech and language tasks.

If you’re looking for someone to implement or enhance voice features quickly, reliably, and at scale, you’re more than welcome to contact me at [email protected].

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  1. RealtimeSTT Public

    A robust, efficient, low-latency speech-to-text library with advanced voice activity detection, wake word activation and instant transcription.

    Python 6.5k 527

  2. RealtimeTTS Public

    Converts text to speech in realtime

    Python 2.8k 275

  3. Linguflex Public

    Command Your World with Voice

    Python 627 58

  4. LocalAIVoiceChat Public

    Local AI talk with a custom voice based on Zephyr 7B model. Uses RealtimeSTT with faster_whisper for transcription and RealtimeTTS with Coqui XTTS for synthesis.

    Python 604 69

  5. AIVoiceChat Public

    Low latency ai companion voice talk in 60 lines of code using faster_whisper and elevenlabs input streaming

    Python 277 55

  6. TurnVoice Public

    Voice Transformation for Videos. 🎤👄🎬

    Python 235 24

750 contributions in the last year

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Activity overview

Contributed to KoljaB/RealtimeTTS, KoljaB/RealtimeSTT, KoljaB/Linguflex and 16 other repositories
Loading A graph representing KoljaB's contributions from March 31, 2024 to April 02, 2025. The contributions are 97% commits, 2% pull requests, 1% issues, 0% code review.   Code review 1% Issues 2% Pull requests 97% Commits

Contribution activity

April 2025

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