I2S Maximum Channels

barometre
Posts: 20
Joined: Mon May 09, 2016 11:22 am

I2S Maximum Channels

Postby barometre » Mon May 14, 2018 10:23 pm

Hi,

Esp32 have two i2s peripherals. Can both be configured to as output? If yes is it possible to have different output from them?

I would like to build a simple boombox with simple frequency filtering.

What is the maximum lrck frequency? Is it possible to have multichannel audio for crossover purposes.

Thanks

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Jakobsen
Posts: 57
Joined: Mon Jan 16, 2017 8:12 am

Re: I2S Maximum Channels

Postby Jakobsen » Tue May 15, 2018 10:38 am

Hi Barometre

Yes - I did a simple test last year.
Simple crossover filter for bass / tweeter on left channel audio but only using on i2s output from the ESP32. Should be easy to use second i2s output for right channel as well.

I will check if possible on my setup as well - The amp's we design takes 2 x i2s input to support up to 4 single ended output channels.

Regards Jakobsen
Analog Digital IC designer / DevOps @ Merus Audio, Copenhagen, Denmark.
We do novel and best in class Audio amplifiers for consumer products.
Programmed assembler for C-64 back in 1980's, learned some electronics - hacking since then

barometre
Posts: 20
Joined: Mon May 09, 2016 11:22 am

Re: I2S Maximum Channels

Postby barometre » Mon Oct 01, 2018 1:24 pm

Jakobsen wrote:Hi Barometre

Yes - I did a simple test last year.
Simple crossover filter for bass / tweeter on left channel audio but only using on i2s output from the ESP32. Should be easy to use second i2s output for right channel as well.

I will check if possible on my setup as well - The amp's we design takes 2 x i2s input to support up to 4 single ended output channels.

Regards Jakobsen

Hi,

Do you mean, "you set both I2S data lines as output and each outputting stereo channels then you had 2*stereo channels to frequency filtering"?

Thanks

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