alsa-jack-loopback HF-roll-off (REW)

[Capoeira]

Has anybody ever directly looped-back alsa-out to alsa-in in a alsa-jack-loopback and measured the response in REW?

I measure a HF-roll-off after 16Khz:

[Capoeira]

found out it changes with samplerate. 88.2 is minimum to get flat to 20Khz

[Capoeira]

finaly found a solution to use REW in 44100

instead of the usual alsa_in and alsa_out:

Code: Select all

zita-j2a -d ploop -r 44100 -Q 96
zita-a2j -d cloop -r 44100 -Q 96

rrrr.jpg (177.79 KiB) Viewed 1098 times

[Capoeira]

unfortunatly the zita stuff is unstable.

I now found in Pipewire the best solution: viewtopic.php?p=127073#p127073