How do you make the Lowpass filter cut off much lower frequencies?

Question

Ive noticed a lot of DS libraries, such as the 'Cassette PT-10 - Flute.dspreset' use a lowpass filter cutoff that can cut much lower frequencies than what the standard DS template filter cutoff, or 'tone' control can.

is it possible that I haven't set mine up correctly?

I have tried changing the script to match exactly what other DS libraries use but this doesn't seem to fix the issue.

tThanks in advanced guys,

Kris

Answer 1

Hello Kris,

Most DS instruments I have tried are using a translation table to get a more meaningful behavior with the lowpass filter.

As a matter of fact, all the ones I tried are using pretty much the exact same translation table which probably comes from the dspreset examples supplied by Decent Sampler's author David Hilowitz.

As far as I am concerned, this is what I am doing - which is very close :

        <binding type="effect" level="instrument" position="0" parameter="FX_FILTER_FREQUENCY" translation="table" translationTable="0.0,33;0.1,63;0.2,121;0.3,232;0.4,444;0.5,852;0.6,1632;0.7,3127;0.8,5992;0.9,11482;1.0,22000">
        </binding>

The "position" value may need to be changed depending on the order in which you created your effects.

I calculated the "translationTable" values so it's linear but in a log scale which makes more sense from a perceptual point of view.