Time Correction of Anti-Aliasing Filters Used in Digital Audio Systems
Because of the steep rolloff characteristic demanded, anti-aliasing filters as commonly implemented for digital audio systems introduce significant high-frequency delay. A tunable analog phase-shift filter which corrects for this time distortion has been developed and is presented. Correction may be done before or after digital processing. The audibility of the effect is discussed, and a phase-corrected 16-bit digital audio recorder used in gathering scientific audio data is described.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.