Perfectly reasonable. Please bear in mind that you will also need a USBi, which will cost an additional $20. I would suggest choosing the variant which includes the codec PCB, as it offers eight DAC channels and six ADC channels, all with optional differential output.
Cool! I have messed with stuff like this before for my job, I believe I even used Sigma Studio (used to work on BT speakers and headphones) but there were always engineers around to make sure I was able to play with the DSP successfully. So, if I run into a situation where something needs to be wired up and there aren't instructions, I will find myself at the bottom of an unknown learning curve...
Almost certainly room for improvement with a few modifications.
The TOSLINK RX/TX is on the DSP board itself, so you do not need the codec board in order to make use of it.
WONDOM has a SPDIF in out board. It's made for their other products that have s2d connectors. But it could be soldered to the board. Or you could use a cat5 connector. There are several Wondom videos on Youtube with instructions. I have 1 on order. Have you put it to use yet? Do you think the analog output board would fit in the case? Here are some video links
I just ordered on and it should be here in 2 weeks. Isn't J106 the l2s connections? I'm just learning about that and don't know much about it. I read that some manufacturers use cat5 cable and connectors for it. . I see they offer several IO boards for that. Can I daisychain 2 or more input and output boards to the respective in and out buss? Could you get it up to the 8x8 capacity of the DSP? My plan is to use it in my car with a 2x1 setup. I may add an aditional output to go to seperate bass, treble and sub amps.
It should be possible to slave one of these units to another and route the additional channels from master to the slave's DACs via TDM. This would require disconnection of the MCK oscillator on the slave. I would not recommend this approach unless you are very familiar with the ADAU1701 and the standards involved.
You'll lose the front panel potentiometer and switch functionality if you add additional audio I/O to the AA-AP23123, the GPIO pins you need are already used:
I would like to add more than 1 l2s devices. Where could I get info on how to properly daisy chain them?
The analog output of the AA-AP23123 has very little headroom and overall has lower output obtained with the APM 2 attached to the AA-AA11428 extension board. Would be ideal to obtain a schematic of the AA-AP23123; particularly the analog I/O circuitry.
How did you add the pcm5102 boards? I'm interested in adding these dacs from aliexpress so I can get more output voltage
I added the PCM5102 boards to an ADAU1401 evaluation module, not the AA-AP23123. You'll lose some of the front panel controls on the AA-AP23123 if you add DACs, see post #30 above.
