During June 2025, sdrkyj focused on improving audio reliability in the espressif/arduino-esp32 repository by delivering a targeted bug fix for the ESP32 I2S simple tone example. Working in C++ and leveraging expertise in audio processing and embedded systems, sdrkyj corrected pin definitions, refined sample calculations, and ensured accurate data writing to the I2S interface. This patch addressed issues with audio waveform delivery across common microcontroller configurations, reducing user-reported problems and streamlining the developer onboarding process. The work demonstrated a strong grasp of low-level I2S handling and contributed to higher code quality in Arduino-based embedded audio applications.