9 - Synthesizer Basics
Dynamic Filters
E-MU Systems
153
Dynamic Filters
Following is a block diagram of the signal path.
The Proteus X utilizes advanced Z-plane filters which can dramatically alter the sound of
a sample.
To understand how a filter works, we need to understand what makes a sound wave. A
sine wave is the simplest form of sound wave. Any waveform except a sine wave can be
analyzed as a mixture of sine waves.
One way to represent complex waveforms is to use a chart with frequency on one axis
and amplitude on the other. Each vertical line of the chart represents one sine wave at a
specific amplitude and frequency.
What is a Filter?
Most samples are complex waves containing many sine waves of various amplitudes and
frequencies. A filter is a device which allows us to remove certain components of a
sound depending on its frequency. For example, a Low Pass Filter lets the
low frequencies
pass
and removes only the high frequencies.
Samples
Amp
L
R
Freq.
Vol
Q
Retrigger
Pitch
Glide
Glide
Start Offset
Pan
Z-Plane
Filter
20
40
60
80
100
40
80
160
360
720
1440 2880
Frequency
...
Amplitude
Frequency vs Amplitude
Summary of Contents for ProteusX
Page 1: ...E MU Systems 1 Desktop Sound Module Desktop Sound Module Operation Manual Operation Manual...
Page 10: ...10 Proteus X Operation Manual...
Page 54: ...4 Multisetup Global Controls Working with Multisetups 54 Proteus X Operation Manual...
Page 134: ...7 Effects Effects Descriptions 134 Proteus X Operation Manual...