boxerfan88
Well-known member
Since my UMIK spoil liao, no more measurements for the time being, ... until I decide on the replacement.
Decided to spend some time on research. This time on the phase differences between FIR vs. IIR processing.
Process
Findings - big surprise from my expectation.
Here's the compare chart:
Hmm ... I wonder if I made some mistake with the FIR impulse wave generation?
.
Decided to spend some time on research. This time on the phase differences between FIR vs. IIR processing.
Process
- Generate REW sweep WAV file.
- Run it through the 2 different EQ processing algorithm (MathAudio IIR, FIR convolution), then save the resulting WAV files.
- Convert the resulting WAV files to mono.
- Import the resulting WAV files into REW.
- Analyze.
Findings - big surprise from my expectation.
- I expected FIR processing to be linear phase, but it wasn't
- I expected IIR processing to have phase changes at the EQ points, yes this happened.
Here's the compare chart:
Hmm ... I wonder if I made some mistake with the FIR impulse wave generation?
.