ESP32: record audio with an INMP441 I2S microphone
Wire a $3 INMP441 MEMS mic to the ESP32 and capture real audio over I2S. The hardware path to sound detection, voice notes, and wake words.
Tag
#audio
6 tutorials
Arduino: voice control with a DFPlayer or voice-recognition module
Voice control on Arduino without the cloud: the DF2301Q offline voice module drives lights and sounds, and a DFPlayer Mini gives the project a voice back.
ESP32: tones and waveforms from the true DAC
Generate real analog tones, ramps, and waveforms on the ESP32's true 8-bit DAC pins (GPIO25/26), from a beep to a sine sweep.
ESP32: play audio through the MAX98357A I2S amp
Wire the MAX98357A I2S amplifier to an ESP32 and play WAV data from flash or an internet stream. The talking-device pattern that pairs with the INMP441 microphone tutorial.
ESP32: read sound level with an analog microphone module
Wire an analog microphone module (MAX4466 or LM393 sound sensor) to the ESP32's ADC and build an RMS sound level meter for clap triggers and noise logging.
ESP32: drive a piezo buzzer with tone()
Use a piezo buzzer with an ESP32 to play tones, melodies, and alarm sounds. The LEDC peripheral does this in hardware, with no CPU overhead.