Hammond SK Pro-73 73-Key Portable Keyboard/Organ - Manual (Page 35)

35
Turn On And Play
LESLIE
Th e SK PRO has an inbuilt digital Leslie that replicates the sound of a twin-rotor
Leslie Speaker Cabinet. In addition, the instrument can also be used with a variety of
diff erent Leslie Speaker Cabinets.
[BYPASS] button
Disables the digital Leslie, producing a “dry” organ sound.
[STOP] button
To toggle between “FAST” and “SLOW” when the [FAST] button is pressed, turn this
button “OFF” (LED not lit).
To toggle between “FAST” and “STOP” when the [FAST] button is pressed, turn this
button “ON” (LED lit).
[FAST] button
Toggles between “FAST” (LED lit) and “SLOW” (LED not lit).
NOTE: The digital Leslie is not available for the Pipe Organ.
NOTE: These controls perform the same functions when a Leslie Speaker Cabinet is
connected via the 11-pin socket.
NOTE: You can fi ne-tune the Parameters of the inbuilt digital Leslie. See the pages 88 and
124 for more details.
OTHER EFFECTS
OVERDRIVE
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
“Overdrive” adds distortion to the sound by increasing the pre-amplifi er input gain.
Press the OVERDRIVE button to turn the Overdrive eff ect “ON” (LED lit) or “OFF”
(LED not lit).
MULTI-EFFECTS
Th ere are several Multi Effects which you can use to enhance the sound.
REVERB
Th e SK PRO has built-in Reverb (reverberation) which allows you to simulate several
diff erent acoustic profi les.
BUTTON MODE
BYPASS STOP FAST CH=1
CH=3 or
digital Leslie
Off Off On Fast
Off Off Off Slow
Off On On Fast
Off On Off Stop
On On On Fast
Bypass
On On Off Stop
On Off On Fast
On Off Off Slow
LESLIE BUTTONS AND MODES
800Hz
Ampli-
fier
Horn
Driver
Woofer
Bass
Rotor
Horn
Rotor
Stationary
Speaker
WHAT IS THE LESLIE EFFECT?
When the Hammond Organ was fi rst introduced in
the mid 30’s, the sound-producing apparatus was
not contained within the console. A separate “tone
cabinet” had to be connected to the organ console
via a special cable. For many years, Hammond
manufactured tone cabinets specifically for use
with Hammond Organs. The best known of these
is probably the PR-40 model.
In the late 30’s, an independent engineer and
organ enthusiast named Donald J. Leslie found
that rotating a baffl
e in front of a stationary speaker
created the eff ect of a tremulant (the well-known
“Doppler eff ect) and called the subsequent speaker
the “Vibratone.” ( The “Vibratone” designation
was eventually dropped and subsequent models
would be known simply as Leslie Speakers.) Many
models of Leslie Speakers have been made over
the years; probably the best known being the
models 122, 142, 145 and 147. The figure below
shows the configuration of a typical twin-rotor
Leslie Speaker Cabinet.
The inbuilt digital Leslie on the SK PRO reproduces
all three modes - “FAST,” “SLOW” and “OFF.” In
addition, all three modes are available when the
SK PRO is connected to an 11-pin Leslie Speaker
Cabinet.