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Table 2 FIR and IIR order for the interpolating filter, oversampling x8.

From: Mixed-Signal Architectures for High-Efficiency and Low-Distortion Digital Audio Processing and Power Amplification

 

FIR

IIR

 

Equiripple

Kaiser

Butt.

Cheb.

Elliptic

Mask 1

193

233

38

13

7

Mask 2

129

146

24

11

7