Problem with internal DAC's

[bastian187]

@schreibfaul1
Hello,
I want to use the internal 8bit DAC's of the ESP32 with this library with the arduino IDE, to have a simple internet radio.
I used the "audio I2S" example and I added to the setup:
Audio audio(true, I2S_DAC_CHANNEL_BOTH_EN); audio.setInternalDAC(true);
And I delted: audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
If I load this to my ESP32, the serial Monitor shows:
" ERROR A stack overflow in task loopTask has been detected.
abort() was called at PC 0x40088a60 on core 1 "
I connected earphones to the DAC pins and I hear nothing!
Could anyone help me?

[schreibfaul1]

Hello @bastian187
Audio audio(true, I2S_DAC_CHANNEL_BOTH_EN);
is correct and
// audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
is commented out
then the analog audio signal at PIN 25 and 26 can be heard.
Unfortunately the internal DAC does not (yet) work with version 2.0.1, espressif/arduino-esp32#5938
better to use the Arduino version 1.0.6

[bastian187]

Hello @schreibfaul1 , thank you for your answer.
But how can I add the esp32 boards in this version?
Under preferences I can't paste the link for adding the esp32 boards!

[schreibfaul1]

I don't know which IDE you are using.
For the Arduino IDE please have a look here,
https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/
in Boards Manager 'Select Version' and then select V1.0.6

[FedericoBusero]

I2S_COMM_FORMAT_STAND_I2S -> I2S_COMM_FORMAT_STAND_MSB ?

[schreibfaul1]

unfortunately not, it just comes:
Audio.cpp:165:69: warning: 'I2S_COMM_FORMAT_I2S_MSB' is deprecated [-Wdeprecated-declarations]

V2.0.0-rc2 is the last version that works with the internal DAC

[bastian187]

I had already the ESP32 version V1.0.6. as you can see in the picture!

[FedericoBusero]

@schreibfaul1 I2S_COMM_FORMAT_I2S_MSB is deprecated but I2S_COMM_FORMAT_STAND_MSB is the new one.

It did work (compile without warning and also work in reality) until V2.0.0-rc2 but indeed no longer in V2.0.1

So I guess you need to change code to I2S_COMM_FORMAT_STAND_MSB in case of DAC builting playback in arduino core v2. Then, at least, it works in V2.0.0-rc2 and hope it will return

[bastian187]

@schreibfaul1
@FedericoBusero
Hi,
I changed I2S_COMM_FORMAT_STAND_I2S to I2S_COMM_FORMAT_STAND_MSB but I'm getting the same errors (stack overflow and no sound)!
Any ideas?

[Mandictra]

@schreibfaul1 Hello, I want to use the internal 8bit DAC's of the ESP32 with this library with the arduino IDE, to have a simple internet radio. I used the "audio I2S" example and I added to the setup: Audio audio(true, I2S_DAC_CHANNEL_BOTH_EN); audio.setInternalDAC(true); And I delted: audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT); If I load this to my ESP32, the serial Monitor shows: " ERROR A stack overflow in task loopTask has been detected. abort() was called at PC 0x40088a60 on core 1 " I connected earphones to the DAC pins and I hear nothing! Could anyone help me?

@bastian187 did you figure this out? Could you help me out?

[schreibfaul1]

Since Espressif's IDE V5, there is no I2S function for the internal DAC. Therefore, it is no longer part of this library.