Search found 4 matches

by chencang
Thu Mar 21, 2019 12:58 pm
Forum: ESP-ADF
Topic: The ESP32 LYRAT V4.3 board has poor sound quality. SNR only 26 dB
Replies: 4
Views: 11580

Re: The ESP32 LYRAT V4.3 board has poor sound quality. SNR only 26 dB

Have you solved this problem ? thank you!!
by chencang
Sun Mar 03, 2019 8:38 am
Forum: ESP-ADF 中文讨论版
Topic: ESP32 MP3解码器支持24b的mp3文件吗?
Replies: 0
Views: 5549

ESP32 MP3解码器支持24b的mp3文件吗?

大家好,我想要播放24b的mp3文件,在例子pipeline_sdcard_mp3_control的ES8388和I2S结构体设置为24b后,实测播放MP3文件时I2S出来的还是16b。难道ESP32的MP3解码器不支持24b的吗?

#define AUDIO_HAL_ES8388_DEFAULT(){ \
.adc_input = AUDIO_HAL_ADC_INPUT_LINE1, \
.dac_output = AUDIO_HAL_DAC_OUTPUT_ALL, \
.codec_mode = AUDIO_HAL_CODEC_MODE_BOTH, \
.i2s_iface ...
by chencang
Thu Feb 28, 2019 4:27 pm
Forum: ESP-ADF
Topic: The I2C data reading function has ACK. I don't want to have ACK just like writing function.
Replies: 1
Views: 4329

The I2C data reading function has ACK. I don't want to have ACK just like writing function.

The I2C data reading function has ACK. I don't want to have ACK just like writing function. How to do it, thank you!

esp_err_t i2c_master_read_byte(i2c_cmd_handle_t cmd_handle, uint8_t* data, i2c_ack_type_t ack);

esp_err_t i2c_master_write(i2c_cmd_handle_t cmd_handle, uint8_t* data, size_t data ...
by chencang
Fri Feb 22, 2019 3:58 pm
Forum: ESP-ADF
Topic: The ESP32 LYRAT V4.3 board has poor sound quality. SNR only 26 dB
Replies: 4
Views: 11580

The ESP32 LYRAT V4.3 board has poor sound quality. SNR only 26 dB

The ESP32 LYRAT V4.3 board has poor sound quality. I think linear interpolation is off.
I use the routine pipeline_sdcard_mp3_control that comes with ESP32 ADF. When I play 1KHZ on the ESP32 LYRAT V4.3 development board, the waveform is a little bad. The attachment is my test result.
We can see ...

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