ESP32-S3-Korvo-2 V3.1 #1944

GFelipeSanchezS · 2025-03-04T01:25:19Z

GFelipeSanchezS
Mar 4, 2025

I was trying to add a custom board. the ESP32-S3-Korvo-2 with the ES8311. I was following the guide and the code compiles, but no audio comes out of it. Am I doing something wrong? I saw that the legacy Arduino AudioKit library did not support it, but that is all the information I found on it.

This is my code:

#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioBoardStream.h"

AudioInfo info(32000, 2, 16);
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> sound(sineWave);
DriverPins korvo_pins;
AudioBoard board(AudioDriverES8311, korvo_pins);
AudioBoardStream out(board);
StreamCopy copier(out, sound);

void setup(void) {
  Serial.begin(115200);
  while (!Serial); // Wait for Serial Monitor to open
  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
  Serial.println("\nStar");

  korvo_pins.addI2C(audio_driver::PinFunction::CODEC, 18, 17);
  korvo_pins.addI2S(audio_driver::PinFunction::CODEC, 6, 9, 45, -1, 8);

  // start I2S
  Serial.println("starting I2S...");
  auto config = out.defaultConfig(TX_MODE);
  config.copyFrom(info);
  config.sd_active = true;
  out.begin(config);

  // Setup sine wave
  sineWave.begin(info, N_B4);
  Serial.println("started...");
}

void loop() {
  // Serial.println(mcp.digitalRead(LED_PIN));
  copier.copy();
}

Runtime Info:

18:58:22.405 -> ESP-ROM:esp32s3-20210327
18:58:22.405 -> Build:Mar 27 2021
18:58:22.405 -> rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
18:58:22.405 -> SPIWP:0xee
18:58:22.405 -> mode:DIO, clock div:1
18:58:22.405 -> load:0x3fce2820,len:0x1188
18:58:22.405 -> load:0x403c8700,len:0x4
18:58:22.405 -> load:0x403c8704,len:0xbf0
18:58:22.405 -> load:0x403cb700,len:0x30e4
18:58:22.405 -> entry 0x403c88ac
18:58:22.599 -> 
18:58:22.599 -> Star
18:58:22.599 -> starting I2S...
18:58:22.632 -> [I] AudioTypes.h : 130 - in: sample_rate: 32000 / channels: 2 / bits_per_sample: 16
18:58:22.632 -> [I] AudioTypes.h : 130 - out: sample_rate: 32000 / channels: 2 / bits_per_sample: 16
18:58:22.632 -> [I] AudioTypes.h : 130 -  sample_rate: 32000 / channels: 2 / bits_per_sample: 16
18:58:22.632 -> [I] I2SConfigESP32V1.h : 78 - rx/tx mode: TX_MODE
18:58:22.664 -> [I] I2SConfigESP32V1.h : 79 - port_no: 0
18:58:22.664 -> [I] I2SConfigESP32V1.h : 80 - is_master: Master
18:58:22.664 -> [I] I2SConfigESP32V1.h : 81 - sample rate: 32000
18:58:22.664 -> [I] I2SConfigESP32V1.h : 82 - bits per sample: 16
18:58:22.664 -> [I] I2SConfigESP32V1.h : 83 - number of channels: 2
18:58:22.664 -> [I] I2SConfigESP32V1.h : 84 - signal_type: Digital
18:58:22.664 -> [I] I2SConfigESP32V1.h : 85 - buffer_count:6
18:58:22.696 -> [I] I2SConfigESP32V1.h : 86 - buffer_size:512
18:58:22.696 -> [I] I2SConfigESP32V1.h : 87 - auto_clear: true
18:58:22.696 -> [I] I2SConfigESP32V1.h : 89 - i2s_format: I2S_STD_FORMAT
18:58:22.696 -> [I] I2SConfigESP32V1.h : 92 - use_apll: true
18:58:22.696 -> [I] I2SConfigESP32V1.h : 98 - pin_mck: 6
18:58:22.696 -> [I] I2SConfigESP32V1.h : 100 - pin_bck: 9
18:58:22.696 -> [I] I2SConfigESP32V1.h : 102 - pin_ws: 45
18:58:22.696 -> [I] I2SESP32V1.h : 259 - dma_frame_num: 768
18:58:22.696 -> [I] I2SESP32V1.h : 164 - tx: -1, rx: -1
18:58:22.729 -> [I] I2SESP32V1.h : 282 - mclk_multiple=256
18:58:22.729 -> [I] SoundGenerator.h : 165 - SineWaveGenerator::begin(channels=2, sample_rate=32000, frequency=493.88)
18:58:22.729 -> [I] SoundGenerator.h : 150 - bool audio_tools::SineWaveGenerator<T>::begin() [with T = short int]
18:58:22.729 -> [I] AudioTypes.h : 130 - SoundGenerator: sample_rate: 32000 / channels: 2 / bits_per_sample: 16
18:58:22.729 -> [I] Buffers.h : 376 - resize: 4
18:58:22.761 -> [I] SoundGenerator.h : 193 - setFrequency: 493.88
18:58:22.761 -> [I] SoundGenerator.h : 194 - active: true
18:58:22.761 -> started...
18:58:22.761 -> [I] StreamCopy.h : 173 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
18:58:22.761 -> [I] StreamCopy.h : 173 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops

It compiles with no issues, and no runtime errors. Just no audio comes out. I tested some ESP-ADF examples to check if the board was faulty, but the ESP-ADF examples run correctly. Am I doing something wrong?

Answered by pschatzmann

Mar 4, 2025

Did you activate the PA (Power Amplifier) via it's pin ?

View full answer

pschatzmann · 2025-03-04T07:38:25Z

pschatzmann
Mar 4, 2025
Maintainer

You have defined the TX pin as -1 !
See this log statement:

18:58:22.696 -> [I] I2SESP32V1.h : 164 - tx: -1, rx: -1

The ES8311 driver should work since I have tested it with the LyraT Mini...

2 replies

GFelipeSanchezS Mar 4, 2025
Author

The problem here is that the ES8311 pin for ASDOUT is not connected to the ESP32-S3 but it is rather a floating TP and pin connector. Only the ES7210 has the SDOUT connected directly to the ESP32-S3, but as you can see on the schematics, those two nets are not the same. For the Korvo-2 V3.1, the ES8311 is used only as a DAC becuase it has the ES7210 (ADC) for the microphones and there is no "LINE IN"

PS: Found typo on pin for MCLK. It is IO16, not IO6. Compiled again with IO16 , still no audio.
korvo_pins.addI2S(audio_driver::PinFunction::CODEC, 16, 9, 45, -1, 8);

Tried setting it up using the ES7210 (IO10) just to test, still no audio:
korvo_pins.addI2S(audio_driver::PinFunction::CODEC, 16, 9, 45, 10, 8);

[I] I2SESP32V1.h : 164 - tx: 10, rx: -1

GFelipeSanchezS Mar 4, 2025
Author

Other things I have tried and failed:

Physically bridged ES7210 SDOUT and ES8311 ADSOUT since I only need audio output and will not use the ES7210.
Physically bridged ES8311 to IO5 (Board buttons Net) and replaced the buttons with an I2C IO expander for the buttons.

Random thought: Could I use the I2C IO expander to drive the missing ASDOUT pin? If so, how would that work?

pschatzmann · 2025-03-04T20:35:30Z

pschatzmann
Mar 4, 2025
Maintainer

From this info the I2S data out pin is GPIO 8...

korvo_pins.addI2S(audio_driver::PinFunction::CODEC, 16, 9, 45, 8, -1);

Don't confuse in and out data pins: from the esp32 it is out from the ES8311 it is in. My naming is using the esp32 point of view!

4 replies

GFelipeSanchezS Mar 4, 2025
Author

I still have no audio with this

16:20:22.251 -> starting I2S...
16:20:22.283 -> [I] AudioTypes.h : 130 - in: sample_rate: 32000 / channels: 2 / bits_per_sample: 16
16:20:22.283 -> [I] AudioTypes.h : 130 - out: sample_rate: 32000 / channels: 2 / bits_per_sample: 16
16:20:22.316 -> [I] AudioTypes.h : 130 -  sample_rate: 32000 / channels: 2 / bits_per_sample: 16
16:20:22.316 -> [I] I2SConfigESP32V1.h : 78 - rx/tx mode: TX_MODE
16:20:22.316 -> [I] I2SConfigESP32V1.h : 79 - port_no: 0
16:20:22.316 -> [I] I2SConfigESP32V1.h : 80 - is_master: Master
16:20:22.316 -> [I] I2SConfigESP32V1.h : 81 - sample rate: 32000
16:20:22.316 -> [I] I2SConfigESP32V1.h : 82 - bits per sample: 16
16:20:22.316 -> [I] I2SConfigESP32V1.h : 83 - number of channels: 2
16:20:22.349 -> [I] I2SConfigESP32V1.h : 84 - signal_type: Digital
16:20:22.349 -> [I] I2SConfigESP32V1.h : 85 - buffer_count:6
16:20:22.349 -> [I] I2SConfigESP32V1.h : 86 - buffer_size:512
16:20:22.349 -> [I] I2SConfigESP32V1.h : 87 - auto_clear: true
16:20:22.349 -> [I] I2SConfigESP32V1.h : 89 - i2s_format: I2S_STD_FORMAT
16:20:22.349 -> [I] I2SConfigESP32V1.h : 92 - use_apll: true
16:20:22.349 -> [I] I2SConfigESP32V1.h : 98 - pin_mck: 16
16:20:22.349 -> [I] I2SConfigESP32V1.h : 100 - pin_bck: 9
16:20:22.383 -> [I] I2SConfigESP32V1.h : 102 - pin_ws: 45
16:20:22.383 -> [I] I2SConfigESP32V1.h : 104 - pin_data: 8
16:20:22.383 -> [I] I2SESP32V1.h : 259 - dma_frame_num: 768
16:20:22.383 -> [I] I2SESP32V1.h : 164 - tx: 8, rx: -1
16:20:22.383 -> [I] I2SESP32V1.h : 282 - mclk_multiple=256
16:20:22.383 -> [I] SoundGenerator.h : 165 - SineWaveGenerator::begin(channels=2, sample_rate=32000, frequency=493.88)
16:20:22.383 -> [I] SoundGenerator.h : 150 - bool audio_tools::SineWaveGenerator<T>::begin() [with T = short int]
16:20:22.415 -> [I] AudioTypes.h : 130 - SoundGenerator: sample_rate: 32000 / channels: 2 / bits_per_sample: 16
16:20:22.415 -> [I] Buffers.h : 376 - resize: 4
16:20:22.415 -> [I] SoundGenerator.h : 193 - setFrequency: 493.88
16:20:22.415 -> [I] SoundGenerator.h : 194 - active: true
16:20:22.415 -> started...
16:20:22.415 -> [I] StreamCopy.h : 173 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
16:20:22.446 -> [I] StreamCopy.h : 173 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
16:20:22.446 -> [I] StreamCopy.h : 173 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops

I ran ESP-ADF examples again, just to make sure the board did not brick, but those run with no problems.

pschatzmann Mar 4, 2025
Maintainer

Did you activate the PA (Power Amplifier) via it's pin ?

Answer selected by GFelipeSanchezS

GFelipeSanchezS Mar 5, 2025
Author

In addition to the Audio, I added another I2C device to the bus. Leaving it here as it might be useful to others

#include <Adafruit_MCP23X17.h>
#include "AudioTools.h"
#include "AudioTools/AudioLibs/AudioBoardStream.h"

// For Adafruit I2C GPIO Expander
Adafruit_MCP23X17 mcp;
#define VALVE1 0
#define VALVE2 1
#define VALVE3 2

AudioInfo info(32000, 2, 16);
SineWaveGenerator<int16_t> sineWave(32000);
GeneratedSoundStream<int16_t> sound(sineWave);
DriverPins korvo_pins;
AudioBoard board(AudioDriverES8311, korvo_pins);
AudioBoardStream out(board);
StreamCopy copier(out, sound);

void setup(void) {
  Serial.begin(115200);
  while (!Serial); // Wait for Serial Monitor to open
  // AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
  Serial.println("\nStart");

  // enable PA
  pinMode(48, OUTPUT);
  digitalWrite(48, HIGH);
  
  // add i2c codec pins: scl, sda, port
  korvo_pins.addI2C(audio_driver::PinFunction::CODEC, 18, 17);
  // add i2s pins: mclk, bclk/sclk, ws/lrclk, data_out, data_in
  korvo_pins.addI2S(audio_driver::PinFunction::CODEC, 16, 9, 45, 8, -1);
  // Init I2C before using any other I2C device
  korvo_pins.begin();

  // Pass the I2C bus to the other I2C devices:
  auto korvo_pins_i2c = korvo_pins.getI2CPins(audio_driver::PinFunction::CODEC); // Get the already init I2C
  // if (!korvo_pins_i2c){
  //   Serial.println("Cannot find I2C Pins");
  //   while(1);
  // }
  auto korvo_i2c_wire = korvo_pins_i2c.value();

  TwoWire *wire = korvo_i2c_wire.p_wire;

  // Adafruit I2C for MCP. Use your own library from here
  if (!mcp.begin_I2C(0x20, wire)) {
    Serial.println("Error with MCP.");
    while (1);
  }
  mcp.pinMode(VALVE1, INPUT_PULLUP);
  mcp.pinMode(VALVE2, INPUT_PULLUP);
  mcp.pinMode(VALVE3, INPUT_PULLUP);

  // start I2S
  Serial.println("starting I2S...");
  auto config = out.defaultConfig(TX_MODE);
  config.copyFrom(info);
  config.sd_active = true;
  out.begin(config);

  // Setup sine wave
  sineWave.begin(info, N_B4);
  Serial.println("started...");
}

void loop() {
  Serial.print(mcp.digitalRead(VALVE1));
  Serial.print(mcp.digitalRead(VALVE2));
  Serial.println(mcp.digitalRead(VALVE3));
  copier.copy();
}

pschatzmann Mar 5, 2025
Maintainer

My 5 cents:

The audio-driver library uses by default the Arduino Wire object for I2C, so there is no need to query this.
You can assign your own TwoWire object with korvo_pins.addI2C(audio_driver::PinFunction::CODEC, 18, 17, Wire1); to keep things separate
You could also use korvo_pins.addPin(PinFunction::PA, 48, PinLogic::Output); to initialize the PA

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

ESP32-S3-Korvo-2 V3.1 #1944

{{title}}

{{editor}}'s edit

{{editor}}'s edit

Replies: 2 comments 6 replies

{{title}}

{{editor}}'s edit

{{editor}}'s edit

{{title}}

{{editor}}'s edit

{{editor}}'s edit

{{title}}

{{title}}

{{editor}}'s edit

{{editor}}'s edit

{{title}}

{{title}}

{{title}}

{{title}}

{{editor}}'s edit

{{editor}}'s edit

Select a reply

ESP32-S3-Korvo-2 V3.1 #1944

GFelipeSanchezS Mar 4, 2025

Replies: 2 comments · 6 replies

pschatzmann Mar 4, 2025 Maintainer

GFelipeSanchezS Mar 4, 2025 Author

GFelipeSanchezS Mar 4, 2025 Author

pschatzmann Mar 4, 2025 Maintainer

GFelipeSanchezS Mar 4, 2025 Author

pschatzmann Mar 4, 2025 Maintainer

GFelipeSanchezS Mar 5, 2025 Author

pschatzmann Mar 5, 2025 Maintainer

GFelipeSanchezS
Mar 4, 2025

Replies: 2 comments 6 replies

pschatzmann
Mar 4, 2025
Maintainer

GFelipeSanchezS Mar 4, 2025
Author

GFelipeSanchezS Mar 4, 2025
Author

pschatzmann
Mar 4, 2025
Maintainer

GFelipeSanchezS Mar 4, 2025
Author

pschatzmann Mar 4, 2025
Maintainer

GFelipeSanchezS Mar 5, 2025
Author

pschatzmann Mar 5, 2025
Maintainer