/en/tags/esp-dsp/Recent content in ESP-DSP on Mi&Bee BlogHugo -- gohugo.ioen蓝宝石的傻话Thu, 21 May 2026 10:00:00 +0800/en/posts/physical-world/embedded-anc-esp32/Thu, 21 May 2026 10:00:00 +0800/en/posts/physical-world/embedded-anc-esp32/<p>The ESP32-S3&rsquo;s dual-core Xtensa LX7 processor with vector instruction set extensions is well-suited for the real-time DSP workloads required by embedded ANC. Combined with the ESP-DSP library, efficient adaptive filtering becomes practical on this platform.</p> <h2 id="i2s-microphone-capture">I2S Microphone Capture</h2> <p>ANC requires at least two synchronous input channels: a reference microphone (capturing ambient noise) and an error microphone (capturing residual error). The ESP32-S3 I2S peripheral supports simultaneous multi-channel ADC data reception. Configuring it for 16-bit, 16 kHz sampling suffices for consumer-grade ANC.</p>