libsdl-org/opus
Jun 2025 – Jul 2025
2 Months active
Languages Used
Python
Technical Skills
Data PreprocessingScriptingSignal ProcessingAudio Signal ProcessingPython ScriptingScientific Computing
Jan Buethe
PROFILE
Jan Buethe
Jan Buethe contributed to the libsdl-org/opus repository by developing tools and enhancements focused on audio data processing and evaluation. He implemented a reproducibility feature in the concatenator script, introducing a seed argument to ensure deterministic normalization, and corrected period data handling in the LPCNetVocodingDataset to improve data integrity and model evaluation stability. In addition, Jan built a Python-based high-band audio quality evaluation script that uses STFT and filter banks to objectively assess band-wise distortions between reference and test audio. His work demonstrated strong skills in Python scripting, audio signal processing, and scientific computing, supporting reliable benchmarking and QA workflows.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
3Total
Bugs
1
Commits
3
Features
2
Lines of code
97
Activity Months2
Your Network
22 people
Work History
July 2025
1 Commits • 1 Features
Jul 1, 20252025-07 Monthly summary for libsdl-org/opus: Delivered a High-Band Audio Quality Evaluation Script, enabling objective assessment of high-band processing. The Python tool computes band-wise distortions between reference and test audio using STFT and a filter bank, comparing against a low-pass filtered reference and a frequency-flipped reference to quantify high-band quality. Major bugs fixed: none reported this month. Overall impact: establishes a reproducible QA workflow for high-band audio quality, enabling faster iteration and better QA gates for high-band processing. Technologies demonstrated: Python scripting, STFT, filter banks, audio-processing concepts, and disciplined version control.
1 Commits • 1 Features
Jul 1, 20252025-07 Monthly summary for libsdl-org/opus: Delivered a High-Band Audio Quality Evaluation Script, enabling objective assessment of high-band processing. The Python tool computes band-wise distortions between reference and test audio using STFT and a filter bank, comparing against a low-pass filtered reference and a frequency-flipped reference to quantify high-band quality. Major bugs fixed: none reported this month. Overall impact: establishes a reproducible QA workflow for high-band audio quality, enabling faster iteration and better QA gates for high-band processing. Technologies demonstrated: Python scripting, STFT, filter banks, audio-processing concepts, and disciplined version control.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for libsdl-org/opus focusing on reproducibility and data processing reliability. Delivered a reproducibility enhancement in the concatenator script and fixed period data processing in LPCNetVocodingDataset, improving determinism, data integrity, and model evaluation stability.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for libsdl-org/opus focusing on reproducibility and data processing reliability. Delivered a reproducibility enhancement in the concatenator script and fixed period data processing in LPCNetVocodingDataset, improving determinism, data integrity, and model evaluation stability.
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Quality Metrics
Correctness80.0%
Maintainability80.0%
Architecture66.6%
Performance60.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Python
Technical Skills
Audio Signal ProcessingData PreprocessingPython ScriptingScientific ComputingScriptingSignal Processing
Repositories Contributed To
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