Bad profiling on specific sound

[robinrosenberger]

First: Thanks for this software, it's really great to have an open source alternative to a Kemper!
I have one specific sound in BIAS AMP2 that reliably generates really bad profiles. It's not a serious problem, when I rebuild a similar sound I can't recreate the issue, but maybe its interesting to find out what the problem is in this specific setup.
I'll attach a carla-preset for BIAS AMP2, as well as the test signal reply (created by Ardour freeze, worked flawlessly on other sounds) and the resulting profile.
issue.zip

[olegkapitonov]

Thank you!

This will help a lot!

[olegkapitonov]

Very high bass level (20 Hz point), middle and treble points seem
to be quite normal. And 20 Hz test response signal is very weak.
This is why it fails - this BIAS profile doesn't pass 20 Hz bass sound.

I need to fix this case - if test response is too weak, profiler should not process it,
and should give reasonable predefined low value for this frequency.

I added the hack and set 20Hz response value manually and get this profile

bad-profile-hacked.tapf.zip

in my opinion, not bad.

I will fix this issue, but I need some time to make sure that this fix will not break other cases.

[robinrosenberger]

Thanks for hacking the profile, although that was not my primary concern ;)
I think I added a quite aggressive low-cut on the input which might be the cause, I'll remove that and see what happens, and I will try to force the problem by adding one to an otherwise working setup. If it is the source of the problem I think an error message like "too low bass response" would be enough for a quick fix as well. Or make the default value an option, to avoid breaking the otherwise really impressive profiling?

[robinrosenberger]

Confirmed, adding an EQ cutting the low end on a working setup results in this behaviour