在pipeline_resample范例中做麦克风音频采样的,是ES8311还是ES7243?

zxl777
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Joined: Tue Nov 05, 2019 2:25 am

在pipeline_resample范例中做麦克风音频采样的,是ES8311还是ES7243?

Postby zxl777 » Sat Nov 16, 2019 2:53 am

我到开发板是ESP32-LyraT-Mini
看到源码中有说明
/**
* Audio Recording Flow:
* [codec_chip]-->i2s_stream--->filter-->wav_encoder-->fatfs_stream-->[sdcard]
*/

这个 [codec_chip] 应该是ES8311吧。

而https://docs.espressif.com/projects/esp-adf/zh_CN/latest/design-guide/board-esp32-lyrat-mini-v1.2.html
Audio Codec Chip
The audio codec chip, ES8311, is a low power mono audio codec. It consists of 1-channel ADC, 1-channel DAC, low noise pre-amplifier, headphone driver, digital sound effects, analog mixing and gain functions. It is interfaced with ESP32-WROVER-B Module over I2S and I2C buses to provide audio processing in hardware independently from the audio application.

Audio ADC Chip
The audio codec chip, ES7243, is a low power multi-bit delta-sigma audio ADC and DAC.
In this board this chip is used as the microphone interface.

文中又说ES7243是负责麦克风接口的。
我在电路图上看到麦克风同时接入了ES7243和ES8311,是不是说根据需要,
可以用ES7243,也可以用ES8311对麦克风进行采样?
而pipeline_resample范例中,实际上是用ES8311对麦克风进行采样对?

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