Vintage Keys Signal Flow - E-Mu Vintage Keys Operation Manual

PROGRAMMING BASICS

VINTAGE KEYS SIGNAL FLOW

Going back to the block diagram for a single channel we can re-exam-
ine the complete signal path.
Instrument
Sample
Pitch
Start
Instrument
This is the sampled sound wave. The pitch of the instrument can
be modulated by any modulation source. The sample start point
can only be modulated by a velocity or key source (see the next
page).
Tone
Tone is a simple tone control which can be used to brighten or
mute the sound. Tone can only be modulated by a velocity or key
source (see the next page). Key velocity is commonly used to
modulate the tone so that the harder you play, the brighter the
sound becomes.
Low Pass Filter
The Low Pass Filter is used to shape the harmonic content of an
instrument. The Fc can be modulated by any source. The auxiliary
envelope is commonly used to dynamically shape the harmonic
content over time. Q or resonance can only be modulated by a
velocity or key source. There are two types of low pass filter
available: a 2-pole filter and a 4-pole filter. The 4-pole filter has a
steeper slope and a stronger filtering action.
DCA
Digitally Controlled Amplifier. Together with the Volume
AHDSR, the DCA is used to shape the volume contour of a sound.
The DCA can be controlled by any modulation source. Key Veloc-
ity is often used as a modulation source for the DCA so that the
harder you play, the louder the sound becomes.
Pan
Adjusts the balance of sound to the left and right channels. Pan
can only be modulated by a velocity or key source.
36 Vintage Keys Operation Manual
Low Pass
Tone
Filter
Fc Q
Aux. Volume
AHDSR
DCA Pan
Volume
AHDSR
R
L