AudioRealism Bass Line Manuel d'utilisateur télécharger pdf (Page 89)

=> 8+1FQ-$R(651$*%#(

FulSynth has four different filters (see sections 3.5, 3.6) implemented through

two Pure Data components: svf~, which implements the three different ADSR

modulated filters included in the ‘FILTERBANK’ unit, and moog~, implementing the

low frequency modulated low-pass filter in the MOOG Unit (see functions in

appendix).

In FulSynth svf~ working as a low-pass filter and moog~ have been analyzed

using AudioXplorer (Arizona Software 2006).

Svf~ ‘s Pd component developer doesn’t give

(in the component help file) the slope value of this

multi-band choice filter. However, some posts in Pd

online forums talk about a value of 12dB/oct (PunBB

2005). Besides, an emulation of the classical Moog

filter should have a 24db/oct slope.

Figure 5-II FulSynth filters

H> !-&1Q#5-3(8+1FQ-$R(svf~(1/0^G&##(651$*%(

To define a filter it is essential to visualize the module of its frequency or

impulse response. A dirac~ object generates an impulse in Pd. Applying a delta

function into the filter’s input it is possible to obtain the necessary response.

For each measurement one delta function has been Pd generated and filtered

with FulSynth.

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AudioRealism Bass Line Manuel d'utilisateur Page 89