Questions tagged [pdm]
3 questions
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1 answer
Generate a PDM/DSD stream in LTspice
I'm experimenting with filters for PDM-encoded signals and would like to simulate a variety of such bit-streams in LTspice for simple test signals such as sinewaves, combinations of multiple sinewaves, etc.
A refresher from Wikipedia: PDM means that…
pipe
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Understanding how a digital microphone's output gets stored in DSP memory
I am working with a DSP that takes audio input from a digital microphone. For the sake of this discussion all input sounds are pure sinewaves.
The DSP receives microphone data as 24-bit numbers. Let's say the mic datasheet says its sensitivity is…
user13267
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Can I use three PDM MEMS microphones with an ESP32, even though it already uses an I2S DAC?
For my design, I need stereo audio output (2 MAX98361 ICs work best imo) and three microphone inputs. I figured, the easiest way to do this was to use 3 digital MEMS microphones, but i don't know if the ESP32-C3FN4 (which is the main MCU of the…
laust0rm
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