Hammond SK Pro-73 73-Key Portable Keyboard/Organ - Manual (Page 87)

87
Editing Parameters
MATCHING TRANSFORMER
Th is Page allows you to adjust the Parameters aff ecting the Matching Transformer for
the Tone Wheel and Transistor Organs.
MATCHING TRANSFORMER
SWITCH
Settings: Off , On
Th is allows you to turn the Matching Transformer eff ect “ON” or “OFF.”
DRIVE
Setting Range: 0 ~ 127
Th is allows you to set the saturation level of the Matching Transformer.
A higher value will result in more saturation at low volume levels.
HYSTERESIS
Setting Range: 0 ~ 127
Th is allows you to set the strength of the hysteresis characteristics.
Th e higher the value, the more “asymmetrical” the sound.
DEPTH
UPPER DRAWBARS
PERCUSSION
LOWER DRAWBARS
PEDAL DRAWBARS
Setting Range: 0 ~ 127
Th is allows you to set the amount of the Matching Transformer modeling for each Part
and for the Percussion.
Th
e higher the value, the deeper the eff ect.
WHAT IS A “MATCHING TRANSFORMER?”
The purpose of the Matching Transformer in a
Hammond tone-wheel organ is to “match” the low
Impedance of the generator and key circuits to the
high impedance amplifi er input.
It combines the individual tones from each
Drawbar into one complex musical tone.
Doing this imparts some unique characteristics
to the sound (see the illustrations below), which
are part of the tonal characteristics of a Hammond
tone-wheel organ such as the B-3.
Even though transistor organs do not have a
Matching Transformer, these Parameters can also
be used for the Transistor Organs.
How the Trans - Drive works
How the Trans - Hysteresis works
Input
Output
Drive
Drive
Input
Output
positive
slope
negative
slope
Hysteresis