HQ Player

[aljordan]

I use a DAC that has configurable stop-band attenuation of 130 dB, 90 dB, and 50 dB. If I used an HQPlayer filter like poly-sinc that has a higher amount of stop-band attenuation than that on the FPGA, would the additional attenuation of say 130dB on the FPGA cause additional ringing, or would it do nothing because the pre-attenuation of the HQPlayer filter? I am wondering is it better to set the lowest attenuation on the FPGA when using HQPlayer, or does it not matter.

 

Thanks