AOUT_NG is using the TLV5630 12-bit voltage output DAC. It has 8 channels outputs for CV.
I found that LMP92001 is the same but with 12 channel outputs for CV. I think that STM32F4 board can easy handle this IC since it is the same but with 8 more channels.
Here is the Datasheet:
http://www.ti.com/lit/ds/symlink/lmp92001.pdf
I think it would be great to have 12 channel of CV.
I am waiting for answers if it is possible to control this with mios and how to do this.
I can fast make a prototype board ( spend money 
) when answers are positive and i will share schematics and board files.
Also i have a DIY SMD oven to bake the board. ( I already did 0201 resistors soldering with my oven)
Regards Tilemachos