The ReSpeaker 4-Mics Pi HAT Array is a 4-microphone expansion board for Raspberry Pi designed for AI applications and voice assistants. This board is developed based on AC108 chip, a highly integrated four-channel ADC with I2S/TDM output conversion for high definition voice capture. In addition, this 4-Mics version provides an LED ring, containing 12 APA102 programmable LEDs. This means you can build a powerful and versatile smart speaker with Google Assistant built-in similar to Google Home speakers at an affordable price.
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