teensy 4.1 connections with speaker

[umar]

hay, i am a beginner need some help i am working on beamforming project, i have to connect 8 speakers with teensy 4.1, i need guidance how i can connect them wtih controller, teensy 4.1 has only 2 i2s protocol pins.

 

[MarkT]

It has 2 I2S busses, not 2 I2S pins! For 8 separate channels I think you need to use TDM output to an 8-way DAC and 8 amplifiers for the speakers.

Check the tdm output class in the Audio Tool:
https://www.pjrc.com/teensy/gui/?info=AudioOutputTDM

 

[h4yn0nnym0u5e]

There are two I2S busses, one has 5 data pins, the other has 2. Each has one output pin and one input, but the remaining data pins on SAI1 can be chosen to be output or input. So you can do 8 outputs (each pin is stereo), e.g. using 8 of these.

The Design Tool has a fair amount of connection data in its Info pane, as @MarkT says.

 

[Chris O.]

SAI3 Tx_Data0 on Pin 31- EMC36.

 

[h4yn0nnym0u5e]

Yes, but most other SAI3 pins are only available if you build your own hardware, they’re not on stock Teensy 4.x. Plus you then need to add the low-level code to drive it.

AudioOutputI2SOct will already do the job using SAI1.

 

[Chris O.]

That's all true but I only need this one pin for 8 channel ADAT out.