Chapter 7: Preset Programming
87
PRESET PROGRAMMING
Using a filter, we now have a way to control the harmonic content of
a sampled sound. As it turns out, even a simple low pass filter can
simulate the response of many natural sounds.
For example, when a piano string is struck by its hammer, there are
initially a lot of high frequencies present. If the same note is played
softer, there will be fewer of the high frequencies generated by the
string. We can simulate this effect by routing the velocity of the
keyboard to control the amount of high frequencies that the low pass
filter lets through. The result is expressive, natural control over the
sound.
If an envelope generator is used to control the cutoff frequency of a
low pass filter, the frequency content can be varied dynamically over
the course of the note. This can add animation to the sound as well as
simulate the response of many natural instruments.
PARAMETRIC FILTERS
A more complex type of filter is called a parametric filter. A parametric
filter gives you control over three basic
parameters
of the filter. The
three parameters are:
Frequency, Bandwidth
, and
Boost/Cut
. The Fre-
quency parameter allows you to select a range of frequencies to be
boosted or cut, the Bandwidth parameter allows you to select the
width of the range, and the Boost/Cut parameter either boosts or cuts
the frequencies within the selected band by a specified amount. Fre-
quencies not included in the selected band are left unaltered. This is
different from a band pass filter which attenuates (reduces) frequencies
outside the selected band.
Boost
Cut
Freq.
0 dB
+18 dB
-18 dB
Bandwidth
Frequency
Amplitude
Parametric
Filter
The parametric filter is quite flexible. Any range of frequencies can be
either amplified or attenuated. Often times, several parametric sec-
tions are cascaded (placed one after another) in order to create com-
plex filter response curves.
Содержание MORPHEUS
Страница 10: ...1 Chapter 1 Basic Setup INTRODUCTION BASIC SETUP ...
Страница 11: ...Morpheus Operation Manual 2 ...
Страница 19: ...Morpheus Operation Manual 10 ...
Страница 20: ...Chapter 2 Basic Operation 11 BASIC OPERATION ...
Страница 26: ...Chapter 3 Master Menu 17 MASTER MENU ...
Страница 27: ...Morpheus Operation Manual 18 ...
Страница 30: ...Chapter 3 Master Menu 21 MASTER MENU GLOBAL VELOCITY CURVES ...
Страница 36: ...Chapter 4 Midimap Menu 27 MIDIMAP MENU ...
Страница 37: ...Morpheus Operation Manual 28 ...
Страница 46: ...Chapter 5 Effects Section 37 EFFECTS SECTION ...
Страница 47: ...Morpheus Operation Manual 38 ...
Страница 66: ...Chapter 6 Hyperpreset Menu 57 HYPERPRESET MENU ...
Страница 67: ...Morpheus Operation Manual 58 ...
Страница 76: ...Chapter 7 Preset Programming 67 PRESET PROGRAMMING PRESET PROGRAMMING ...
Страница 77: ...Morpheus Operation Manual 68 PRESET PROGRAMMING ...
Страница 93: ...Chapter 7 Preset Programming 83 PRESET PROGRAMMING ...
Страница 109: ...Chapter 8 Preset Menu 99 PRESET MENU ...
Страница 110: ...Morpheus Operation Manual 100 ...
Страница 138: ...Morpheus Operation Manual 128 ...
Страница 139: ...Chapter 9 Copy Menu 129 COPY MENU COPY MENU ...
Страница 140: ...Morpheus Operation Manual 130 COPY MENU ...
Страница 147: ...Chapter 10 Step by Step 137 STEP BY STEP STEP BY STEP ...
Страница 148: ...Morpheus Operation Manual 138 STEP BY STEP ...
Страница 171: ...Chapter 11 Reference Section 161 REFERENCE SECTION ...