"Working with I2S Microphones on Embedded Systems"
Recently, I’ve been playing with audio recognition on microcontrollers, and I’ve been testing I2S microphones (like the INMP441) as a digital audio input option.
I2S mics output PCM audio directly, no ADC required— just 3 lines: SCK (clock), WS (word select), and SD (data).
The hardware part is simple, but the firmware handling is where things get interesting:
Audio comes in continuously, clock-synced by the MCU.
On ESP32, I2S data goes into DMA buffers—you have to read/process it fast to avoid overflows.
Match sample rate, bit depth, and buffer size to your processing needs.
Clean audio input, but demands solid buffer management on the software side because for me that was like a big headache to manage buffer and run Interference.
HiddenSolve
"Working with I2S Microphones on Embedded Systems"
Recently, I’ve been playing with audio recognition on microcontrollers, and I’ve been testing I2S microphones (like the INMP441) as a digital audio input option.
I2S mics output PCM audio directly, no ADC required— just 3 lines: SCK (clock), WS (word select), and SD (data).
The hardware part is simple, but the firmware handling is where things get interesting:
Audio comes in continuously, clock-synced by the MCU.
On ESP32, I2S data goes into DMA buffers—you have to read/process it fast to avoid overflows.
Match sample rate, bit depth, and buffer size to your processing needs.
Clean audio input, but demands solid buffer management on the software side because for me that was like a big headache to manage buffer and run Interference.
#AudioRecognition #ESP32 #embeddedsystems #NLP
6 months ago | [YT] | 5