DIY ADAU1452 crossover

[bogdansrb]

I'd like to share this DSP crossover I've been working on. It's based on the ADAU1452 and AD1938, it has 2 analog input channels, SPDIF in, I2S in and 8 analog output channels.
It's fairly simple, it self boots from an SPI flash chip and the AD1938 is in hardware mode, so no extra MCUs and configuration. The DSP outputs the master clock and runs everything at 48kHz (it can be changed though).
The extra I2S port is for expanding to maybe a bluetooth board or USB transport.
Although marked as NE5532, I've used OPA1662 op-amps.
I haven't done measurements, but the sound is clean, with no noise, and the amount of stuff you can do with SigmaStudio is quite impressive.

 

[eclipsevl]

Hi,

Is this a second version?
I also wanted to try 1938. Can you sell assembled module or bare pcb?

 

[bogdansrb]

Hi,

Is this a second version?
I also wanted to try 1938. Can you sell assembled module or bare pcb?

Hi,
This is the final version that I assembled and tested. I still have a few bare PCBs if you're interested.
I can also upload the gerbers if anyone wants to have PCBs manufactured.

 

[eclipsevl]

PM sent

 

[john61ct]

When there is a source for fully assembled, ideally in a box please post here.

 

[TOMSON]

I would like to make a crossover for a 2.5-way speaker. Do you still have a PCB for your project for sale? You've come up with a very nice and compact version of the DSP circuit.

 

[bogdansrb]

I've been working on an upgrade to this board. Quite an upgrade. I replaced the AD1938 with an ES9081Q DAC + AK5534 ADC.
I re-did the power section with better regulators. Exposed some GPIO pins on the ADAU1452 to a header. And there's now 2xI2S ports exposed for adding external modules.
I'll be ordering PCBs and I'm planning on selling assembled boards if anyone's interested.