Hello.
I have WAV files that was previously measured offline.
There is measurement data imported at that time with Import-> Sweep Recordings. (20200725_phase_issue.mdat > L-1, L-2)
In that measurement data, the phase rotates around 2kHz, and the crossover of my speaker is 2kHz, so I think it is the correct result.
Since the measurement data was created on July 25, 2020, his version of REW used is V5.20 beta 56 or earlier. (I don't remember the exact version I used at that time)
I use V5.20 RC7 currently, but importing the same offline data produces different phase results than before.
The phase rotation around 2kHz disappears, and the phase does not fluctuate from around -180 degrees after 3kHz. (20200725_phase_issue.mdat > L-1 by V5.20 RC7, L-2 by V5.20 RC7)
The calculation result of Delay is also different.
I created filters that corrected phases to the minimum phase from these measurements by rePhase, convolved them, and compared their sounds.
The filter created based on the phase generated by V5.20 RC7 clearly makes the high frequency sound worse.
In particular, the effect to string instruments of classical sources is remarkable, the tone is extremely sharp, suggestiveness of sound and smoothness are lost, and the sound becomes very false-sounding.
With the filter created from data measured on July 25, 2020, the sound of the strings instrument is very natural and has no false-sounding.
Aside from the final sound quality results, why does the REW V5.20 RC7 produce a different phase than previous versions?
Which phase result is correct?
Is it possible to download and try V5.20 beta 56 or earlier?
Attach the mdat file that imported measurements file and each files used for offline measurements.
- mdat file: 20200725_phase_issue.mdat
- offline measuremts files: 4MMeasSweep_20_to_20000_48k_PCM16_L_refL_20200725_1939_cut.wav (L-1), 4MMeasSweep_20_to_20000_48k_PCM16_L_refL_20200725_1950_cut.wav (L-2)
- sweep stimulus file: 4MMeasSweep_20_to_20000_48k_PCM16_L_refL.wav
I have WAV files that was previously measured offline.
There is measurement data imported at that time with Import-> Sweep Recordings. (20200725_phase_issue.mdat > L-1, L-2)
In that measurement data, the phase rotates around 2kHz, and the crossover of my speaker is 2kHz, so I think it is the correct result.
Since the measurement data was created on July 25, 2020, his version of REW used is V5.20 beta 56 or earlier. (I don't remember the exact version I used at that time)
I use V5.20 RC7 currently, but importing the same offline data produces different phase results than before.
The phase rotation around 2kHz disappears, and the phase does not fluctuate from around -180 degrees after 3kHz. (20200725_phase_issue.mdat > L-1 by V5.20 RC7, L-2 by V5.20 RC7)
The calculation result of Delay is also different.
I created filters that corrected phases to the minimum phase from these measurements by rePhase, convolved them, and compared their sounds.
The filter created based on the phase generated by V5.20 RC7 clearly makes the high frequency sound worse.
In particular, the effect to string instruments of classical sources is remarkable, the tone is extremely sharp, suggestiveness of sound and smoothness are lost, and the sound becomes very false-sounding.
With the filter created from data measured on July 25, 2020, the sound of the strings instrument is very natural and has no false-sounding.
Aside from the final sound quality results, why does the REW V5.20 RC7 produce a different phase than previous versions?
Which phase result is correct?
Is it possible to download and try V5.20 beta 56 or earlier?
Attach the mdat file that imported measurements file and each files used for offline measurements.
- mdat file: 20200725_phase_issue.mdat
- offline measuremts files: 4MMeasSweep_20_to_20000_48k_PCM16_L_refL_20200725_1939_cut.wav (L-1), 4MMeasSweep_20_to_20000_48k_PCM16_L_refL_20200725_1950_cut.wav (L-2)
- sweep stimulus file: 4MMeasSweep_20_to_20000_48k_PCM16_L_refL.wav