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LMMS / lmms

Cross-platform music production software
https://lmms.io
GNU General Public License v2.0
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Calf Filter Plugin Sweeps Automatically #2850

Open toliaferrode opened 8 years ago

toliaferrode commented 8 years ago

If you add a Calf Filter to an instrument or channel while the engine is running, or on it's first play after it's added, or on export, the cut off seems to sweep briefly. I have one project where it didn't do this (I think), but in all my subsequent tests it does it.

Sawuare commented 7 years ago

Confirmed with LMMS 1.2.0-rc.4.

zonkmachine commented 7 years ago

Could be that the control value is simply interpolated and it is initially at a cutoff value defined by the calf people and when you open it fresh it will then do a bit of a trip to whatever value is defined by the lmms ladspa settings?

zonkmachine commented 7 years ago

If I read this correctly the cutoff value would start it's life here with a knob value of '0'. Then it would get set to it's proper value here and the value is interpolated here but I don't know if that interpolation could answer for a sweep that long. Maybe. I'm not concerned by that sweep as you don't usually record sound live when adding/removing pluggins. What I'm a bit worried about however is initializing the model to '0' as that assumes the pluggin isn't doing something silly as actually using a frequency of '0', which actually has been the case if I remember correctly. Some HP filter was trying to EQ '0' Hz resulting in something glitchy. This was pre 1.0 .

PhysSong commented 5 years ago

I wonder if #3929 has fixed this issue. Can anyone re-test this?

zonkmachine commented 5 years ago

Tested. I see no difference.

zonkmachine commented 6 months ago

This is also on the LV2 version of calf filter. The behavior is the same when I add a module in Ardour @JohannesLorenz You hack calf. This is an upstream issue right? Close-ish?