Stream from DAC buffer to WAV

[hash6iron]

Hello @pschatzmann

Could you help me?

I'm directly writting bytes to the i2s DAC using

audiokit::AudioKit::write(const void *src, size_t size, TickType_t ticks_to_wait = 4294967295U))

I'd like to stream from this buffer to WAV. How can I do it?

Thanks in advance.

[pschatzmann]

This is described in the Wiki about Codecs!
Please note that the AudioKit class is obsolete and have been replaced by this

I also have the impression that you rely on an obsolete ESP32 Arduino core!
The actual version is 3.1.1!

[hash6iron]

Yes, I know you had recomended to update previosly but all my project was write so. Change to current version could result in a hard refactoring. I try to use the functionality that this version provide me.

I think that I don't explained correctly.

I'm generate a custom signals and write this to the DAC directly using write, then I'd like to get this buffer and put each byte-block written to WAV file like a stream.

I have not clear how do it.

[pschatzmann]

Same answer: you would just do two writes: the second one to the EncodedAudioStream with a wav encoder.
Or you could do the same thing with one write to a MultiOutput which would go to the dac and the encoder.

[hash6iron]

Thanks so much, that was the key.