how to wire an external DAC and to make it output some sound using an app made with sigma studio 4.7

Question

hello, 
 I have an eval_adau1467Z board, 
 I am able to implement various use cases in it, like using toslink input, doing 2 way crossover and outputing low pass audio to channels 0&1 and high pass to channels 4&5; 
 but now i'd like to wire an external I2S DAC (pcm5102A, like this one www.amazon.com/.../B0DCFN2JGF to j9 connector and on OUT2 pins (in addition to channels 4&5) 
 Alas, no sound is coming out of the external DAC (I tried also another DAC but no sound either) 
 Could someone please guide me for the wire connections and how to build a .dspproj app to handle that external DAC ? 
 thks 
 regards.

Harishgowtham · Accepted Answer

Hello iravelo, 
 Thank you, Best wishes to you too! 
 It seems you got confused with serial port channels. 
 You are sending 3 stereos out from the DSP. Here is the breakdown. 
 The channel 0-1 and channel 4-5 (SDATAIO) belong to serial output port 0 which are already connected to the on-board CODEC (DAC side), so you will get the analog out at jack J12 (OUT1) and J13 (OUT2) respectively. 
 Here is where the problem lies, you mentioned you use serial output port 2, but no channels were there in the schematic which belong to port 2, Rather you configured channel 46-47 which belong to serial output port 3 but stereo is not applicable on those slots even in port 3. So, the output from the core will be ignored, the serial port doesn't acknowledge it. 
 please have a look at the below table. 
 
 So, if you want to use stereo in output port 2 then channel 32-33 (primary) and ch 36-37 (SDATAIO) can be used. 
 if you want to use stereo in output port 3 then channel 40-41 (primary) and ch 44-45 (SDATAIO) can be used. 
 Your hardware connection seems correct; you have correctly connected the serial output port 2 pins to DAC, but you didn't select the correct channels in the schematic. 
 I have modified the outputs in your project, please give it a try. 
 
 1467-01jan2026-a07Max-antal_mod.dspproj)

iravelo · Answer

thanks a lot, I think I got it, 
 bye the way, the pcm1502A being a simple board used to understand/validate the process. Now I switched to one of my target boards, having an ESS9039q2m and dual OPA1612 in its output stage, the connection is like enclosed..

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how to wire an external DAC and to make it output some sound using an app made with sigma studio 4.7

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