Instead, he wound up assembling a custom bass reactive LED display using an ESP32. The entirety of the build is minimal, consisting of a GY-MAX4466 electret microphone module, a KY-040 encoder for ...
along with a low-cost condenser microphone with a transistor-based preamplifier and an LM386 op-amp for the speaker circuit. In the ESP32 module the built-in DAC and ADC are used for audio in and ...
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