Have library power to SPDIF out?

[mmar22]

What you mean can I2S to SPDIF sw code be used here?

[schreibfaul1]

No, I don't have the possibility to test this either.
Have a look here: https://github.com/earlephilhower/ESP8266Audio/blob/master/src/AudioOutputSPDIF.cpp
Maybe you can realise this yourself.

[mmar22]

Ofcourse i dont ask your code, but your meaning. Too question is how is max samplerates for every your codecs...

[schreibfaul1]

The samplerates depends on the source, max is 48KHz, bitrate max 320Kbit/s

[mmar22]

This is clean, but exist hires radio 96kHz/24bit 1300kbit i ask if you have tested ESP32 limits?

[schreibfaul1]

No, we are not travelling in the Hi End range with this hardware, max is 16 bit/sample

[mmar22]

I use spdif code on other project, but here for speedup test can you help where in your code i can set data buffer callback for fill spdif instead i2s out.

[schreibfaul1]

There are two events that can be used to decouple the PCM data:
void audio_process_extern(int16_t* buff, uint16_t len, bool *continueI2S)
void audio_process_i2s(uint32_t* sample, bool *continueI2S)
The latter is used by the ESPuino project for Bluetooth a2dp source

[mmar22]

Maybe i dont ask clean, but i require spdif INSTEAD i2s, then require in your class replace all part that work with i2s and only send to spdif. Or maybe simpler is implement in the middle converter audio to spdif frames and double sample rate. Because spdif code in real use i2s to output signal.

[mmar22]

I implement SPDIF and test it now, but i use too lvgl and when i place in loop
audio.loop(); lv_timer_handler(); /* let the GUI do its work */ delay( 5 );
then i have issue on any animation audio is corrupted.
I mean require dedicated task for audio.loop() , but how stack and other params is optimal ?
Can you recommend any

[mmar22]

@schreibfaul1 i test more and corruption in audio is on AAC station. ANy tip? I use task on core 0 now
void task_AAloop(void) { for( ;; ) { audio.loop(); vTaskDelay(5 / portTICK_PERIOD_MS); } }
too i see little audio skip when info is show
info StreamTitle='Queen - Thank God It's Christmas'