This DSP add-on board adds digital signal processing capabilities to the following HiFiBerry sound cards: DAC2 HD DAC2 Pro DAC2 ADC Pro Digi2 Pro & Digi2 Pro Rev2.2 Amp 100 Have a look at this blog post to learn more about this board. It is directly supported in HiFiBerryOS, with other distributions you will need to install DSP toolkit to program the DSP. Resources What can you do with the DSP add-on module? Datasheet
