0
$\begingroup$

My question is if the transition band in the question below would be from 4Khz to the Nyquist frequency of 22.05Khz or from 4Khz until 44.1Khz-4Khz=40.1Khz?

enter image description here

Improve this question
$\endgroup$
1
$\begingroup$

If you don't want DAC noise near 40-44 kHz to alias down into your audio, you want the narrower/lower transition band reconstruction filter.

Improve this answer
$\endgroup$
2
  • $\begingroup$ So, upper limit is at 22.05kHz? $\endgroup$ – Dokams May 1 '16 at 12:19
  • 1
    $\begingroup$ If the signal bandwidth is $B$, the LPF response should be flat up to $B$, then go to 0 as steeply as feasible. $\endgroup$ – MBaz May 1 '16 at 18:32

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.