Description:

Codec Zero is a Raspberry Pi Zero-sized board but it also includes the HAT EEPROM allowing for auto-configuration of the Linux environment if needed. It is the same size as a Raspberry Pi zero but designer for audio signal input and output processes. It supports a range of input and output devices from built-in MEMS microphones, mono Electret microphones,s or mono speakers (1.2W 8Ω).

The Codec Zero delivers bi-directional digital audio signals (I2S) between the Raspberry Pi and onboard Dialog Semiconductor DA7212. It also has GREEN (GPIO23) and RED (GPIO24) LEDs, that can be used for status and a tactile button (GPIO27) that can be used to start an event. The Codec Zero makes a great starting point for a walkie-talkie / intelligent doorbell, vintage radio hack, or Smart-type speaker.

Features:

1. High-performance 24-bit audio codec.
2. Supports common audio sample rates between 8-96kHz.
3. Built-in MEMS microphone (Mic2).
4. Mono Electret microphone (Mic2 left).
5. Automatic MEMS disabling on Mic2 insert detect.
6. Stereo auxiliary input channel (AUX IN) – PHONO/RCA connectors.
7. Stereo auxiliary output channel (Headphone / AUX OUT) – 3.5mm Stereo jack.
8. Flexible analog and digital mixing paths.
9. DSP for ALC (Automatic Level Control).
10. 5-band EQ (Equalisation).
11. No soldering is required.
12. Mono line-out / mini speaker driver: 1.2W @ 5V, THD<10%, R=8Ω.