Some factory IR's are not phase aligned?

[aziz]

I noticed yesterday that some cab IR's seem to not be phase aligned. I was making a dual cab tone, and with some 4x12" IR's, the sound is a a few samples late compared to the other IR's, resulting in a phasey comb filtered tone. I checked this by panning them hard L/R and then recording and viewing the waveform in the computer, and then trying to determine the correct amount of delay to use in the other cab block for correcting this. I'm not near the Axe now and it's midnight, but I will do this again tomorrow, and check which IR's they were. I was doing a heavy tone, so it might have been the Recto or Kalthallen ones, but I'm not sure anymore.

 

[barhrecords]

I have seen dual amp presets, one amp with a drive and one without, have latency issues that caused this. (or any preset I guess that has two rows identical except for a drive block).

 

[aziz]

Duh, it might be that too!