Recent content by tof_sten

I know pretty well shanon nyquist theorem, it’s more the reconstruction filter oscillation I would like to understand. I will try to find something to read! Thank you very much John!

Ok thank you John. Do you have technical read to share that explain this behaviour? I'm a software and electronic engineer, but it is a shame I don't really get what is this phenomenon :)

Does it mean, I can perform my measurement at higher sample rate (96KHz) and then filter above 20K to see the real impulse response? Is there a way to do that?

The oscillation period is close to 50us which means 20KHz.

Hello, My system is MacBook Pro M1 + Audient ID44 interface running REW 5.20.4 under macOS Big Sur 11.6. I did an impulse response measurement while using REW in loopback (ID44 output 2 directly into ID44 input 4). What I observe is large oscillations. It looks like I have an issue, but I...

Thank you John!

Thank you again! It looks like it affects the Spectrogram view too. Am I right?

Thank you for this answer John. I now have more questions: 1/ I checked "Adjust clock with acoustic ref" is it activated for future measurement only? Can I apply it to previous measurement? 2/ will "Adjust clock with acoustic ref" lead to good enough results or would it be better to to buy a xlr...

Hello, I run REW v5.20 RC9 on an Apple MacBook Pro with M1 processor. I output sound from an Audient ID44 and my mic is a UMIK-1. While doing measurement of speakers in a room, I found out that results vary with different value for the sweep length. Moreover all the impulse shows strange...