Thanks Microcontroller. Came back to delete the post after figuring that out but you beat me.
I was wondering why the dac output rate was less than the 16kHz sample rate.
Thanks again.

Using esp-idf 4.4.7 In this code I am expecting to get buffer overflow events but I am not. It appears that continously writing to the dma tx buffer is slower than the dma_tx_buffer outputing data to the DAC. One task is printing out i2s events as they happen. The other task continously writes 2048 ...

No, it's v4.4. Specifically, the code appears to be there since v4.4.3. Your right. I am using platformio, which doesn't include source of the esp-idf version that it works with. I was looking at v 4.4.2 of the idf which I used to look at source. The esp-idf version that platformio uses is actually...

The IDF driver abstracts the GDMA support of the hardware away to provide a unified application interface across the different SoC. See e.g. https://github.com/espressif/esp-idf/blob/a9d0f22193acdf47a5a4db36832ae7068818962b/components/driver/i2s.c#L467 which is in the #else branch of the #if SOC_GD...

The documentation states that recv_buffer_size > dma_buf_count * dma_buffer_size. That puzzles me a bit. A receive buffer size that spans all DMA buffers would mean that i2s_read() would only return when all DMA buffers are filled. Shouldn't the receive buffer size be just the size of one DMA buffe...

Hello. I am using esp-idf 4.x.x. My program is using i2s peripheral. I am getting the "i2s_event_tx_q_ovf" event but to get that event the gdma would have to be activated. As far as I know, that functionality is not implemented in the esp32 and the function that sends that event is grayed out when I...

I think the logic is that in a situation of extreme CPU pressure, it is 'cheaper' to read out all DMA buffers at the same time rather than to have separate calls to i2s_channel_read(). In the event of a very busy CPU, you'd want to empty all DMA buffers anyway, so you have more space to 'fill up' w...

Hopefully a simple question here. I am writing an audio file to I2S TX buffer which drives the DAC output. The audio file is being sent succesfully as expected. I set up an queue to to notify me when any I2S events occur. I am writing 4092 bytes to the I2S TX buffer which is also 4092 bytes in lengt...

Platformio supports esp-idf. To me the biggest problem it would be 3rd party libraries that you would lose.

You will have to get familiar with the esp32 inputs types and what voltage levels they can accept. You will also need to change each signal from your bike before connecting to the esp32 board. That means you will have to breadboard or design a custom board just to "condition" each signal that you b...