Bug Report: Redraw problems with high-Q notch filters in Melda equalizers.

[mesaone]

The problem:

Notch filters sometimes encounter visual problems with drawing the visual EQ curve in the graph area. It happens with high Q notches, and is especially noticeable when resizing the window. The curve "jumps" around when re-sizing, and the display shows incorrect curves once resizing is done.

I have encountered this with MEqualizer, MAutoDynamicEQ, and MEqualizerLinearPhase. The severity of the problem seems to correspond with the Q value, redraw problems are worse with high Q.

For example, MEqualizerLinearPhase does not suffer from this as much as MEqualizer and MAutoDynamicEqualizer. Note the maximum Q for MEqualizerLinearPhase is 10.0, while it is 20.0 in the others.


To reproduce:

1. Open a Melda EQ mentioned above (MEqualizer, MEqualizerLinearPhase, MAutoDynamicEQ)
2. Create a series of notch filters with Q of 20.0
3. Re-size the plug-in window

Demo video - set to unlisted, but publicly viewable:

[Boone777]

Is that a VST3 ? There is a known problem with reaper and vst3.

[mesaone]

No, this is the 64 bit VST 2 version. Version in the video is 9.06, behavior is the same with the newest release (9.11)

[MeldaProduction]

Yes, well, I'm afraid there's quite no way around it. It's also slightly GPU dependent I'm afraid. Well, you need to use ears as usual .
For the record, this cannot be fixed completely, it can be improved at a cost of much higher CPU requirements...

[ericzang]

mesaone, nice color theme on the plugin! Is that acheived with the built in editor or an external skin?

[mesaone]

mesaone, nice color theme on the plugin! Is that acheived with the built in editor or an external skin?

It is nice indeed! It's a style preset given to me by user lachrimae. I have it set to the Aluminion style, just like lachrimae did.
http://www.kvraudio.com/forum/viewtopic ... e#p6105398