[LMMS-devel] I wrote a LADSPA Crossfader

[Vesa <di...@nb...>]

The concept is simple. It contains one knob and one toggle led.

You add the crossfader effect to two different instruments (or fx
channels). On one, you set the toggle led on, on another, you set it
off. Then you connect both crossfade's knobs to the same automation, and
bang, that automation now works as a crossfade: the way it works is, the
toggle led inverts the value of the knob, so when you automate the knobs
with a slide from 0 to 1, it goes from 0 to 1 on one effect, and from 1
to 0 on another. Producing a neat crossfade effect - where you earlier
would have needed to use two automation tracks to achieve this, you can
now achieve it with one. Making it easier in the long run.

The downside is that it isn't very easy to use live. A workaround is to
connect a LFO controller to it, set the amt to 0 and then control the
base knob.

I may not be explaining this very good... so try it yourself.

https://github.com/diizy/ladspa-xfade

to compile, do:

gcc -O3 -march=native -o xfade.o -c xfade.c
ld -o xfade.so xfade.o -shared
cp xfade.so <your_ladspa_directory>