AnsweredAssumed Answered

SigmaStudio probe : FIR phase error ? (ADAU1452)

Question asked by maxidcx on Jan 20, 2014
Latest reply on Apr 14, 2014 by JCB

Hello,

 

I m preparing a crossover with FIR filter for ADAU1452 and when simulating the result with the probe, I have good magnitude response, but the phase looks completely out.

 

to design the FIR, I have used "rephase" which is a well known freeware solution often used with MiniDSP products.

 

the FIR design window is like this

FIR1000taps400hzHP4_rephase.jpg

the text file generated is included below.

 

When importing the impulse file in another freeware tools called HolmImpulse we get almost the same figures:

FIR1000taps400hzHP4_holm.jpg

but when uploading the table in sigma studio 3.10.2 and launching the probe, we get this window:

FIR1000taps400hzHP4.jpg

where the phase looks cahotic.

 

can you please confirm that this might be a bug in Studio and that the ADAU1452 algortihm is not impacted ?

thank you

fabriceo

Attachments

Outcomes