Waldorf Wave 3.v - Manual (Page 70)

Appendix
PPG Wave 3.V User´s Manual 70
[ Note: please re-read the last topic again, since this
is a valuable feature: Dropping a Transient file
onto the Transient column only loads the sample,
not the associated sound parameters. This allows
to set up a sound and experiment with different
samples for this sound.
[ If you want to use your own Waveterm disk
images in the PPG Wave 3.V, just drag those files
into the File Browser to the location you like.
Please note that the files are moved to your sound
library physically, if you want to copy them, press
the [Alt] key during drag & drop.
Filter Introduction
Once the audio signal leaves the basic sound synthesis, it
is sent to the filter. The filter is a component that have
significant influence on the PPG Wave 3.V’s sound
characteristics.
For now, we’ll explain the basic function of a filter
discussing the type used most commonly in synthesizers
as also in our PPG Wave 3.V: the low pass filter.
The low pass filter type dampens frequencies that lie
above a specified cutoff frequency. Frequencies below
this threshold are hardly affected. The frequency below
the cutoff point is called the pass band range, the
frequencies above are called the stop band range. The
PPG Wave 3.V’s filter dampens frequencies in the stop
band with a certain slope. The slope can be 12dB or 24dB
per octave. This means that the level of a frequency that
lies an octave above the cutoff point will be 12dB or 24dB
less than those frequencies of the signal that fall into the
pass band. The following picture shows the basic
principle of a low pass filter: