29 Jul
2007
29 Jul
'07
3:21 p.m.
On 29 Jul 2007, at 12:58, Georg Holzmann wrote:
Hallo Steve, list !
I just noticed, that the "triple band parametric with shelves"
LADSPA plugin generates a DC offset (tried version 0.4.15 and 0.4.14).
The offset is not always the same: first when I create the plugin,
there is no offset. Then I pressed play/stop (in ardour) and the DC
offset was here - also the amount of the offset is somehow changing
when I play with different parameters (but I did not find out a
real correspondens).
That sounds like it could be related to denormals. They can build up
after you stop tracks, I'm not sure why it would have this effect
though.
However, when I use the "Single band
parametric" and the shelves
alone I don't get an offest (which should be the same code ?).
The effect may be exaggerated with multiple stacked filters? Dunno.
I also made some other small additions to your plugin
collection:
- single low and high shelving filters (see attached files): they
are the same code as in "triple band parametric with shelves",
because I often need only a single shelving filter
- in the "single band parametric" the slider to change the
frequency was linear, I changed this to logarithmic (file attached)
Maybe you could include those plugins/changes in your collection,
at least for me they are quite usefull.
Great, thanks. Do you think you could bundle up the changes into the
new files and a patch for the existing ones in a tarball? I'm off on
holiday tomorrow, but I'll incorporate it when I get back.
Cheers,
Steve