Rane SL 1 Manual 2.44 (3M) - Manual (Page 8)

RANE SL1 FOR SERATO SCRATCH LIVE • OPERATOR’S MANUAL 2.4.4 8
How to Calibrate Scratch Live
With music playing in the background
(from any source), put your needle on
record with the turntable
stopped. If
you are using CD players, the same
rules apply. Have the CD deck paused
or stopped while calibrating. Ensure the
input level in Scratch Live is set correctly
to accept a LINE level signal.
See “Audio
Input Level” on page 30.
Click and hold the estimate button
until the slider stops moving. Moving
the threshold slider to the left will make
Scratch Live more sensitive to slow record
movement, but also more sensitive to
background noise.
Repeat the process for each deck.
Things to remember:
• Your needle must be on the record.
• Your turntable (or CD player) must be
stationary.
• The background music playing must be
at a similar level to which you will play
your set at.
• You should calibrate Scratch Live every
time you play.
TIP: If the slider jumps to the far right,
then you have a problem with noise
in your turntables/CD players/mixer.
Check all your connections and make
sure your equipment is well earthed.
In some situations you will not be able
to improve the signal quality, and you
will have to play on regardless. In this
situation, stick to rel mode.
The Scopes
The scopes on the Setup screen in
Scratch Live display the input signal as a
phase diagram. The key factors to look at
on the scope display are crisp clean lines,
round shape, and the tracking percentage
in the lower right corner.
Calibrating
Scratch Live
Since Scratch Live is controlled by an
analogue signal, there is no guarantee of
what state that signal will be in by the time
the software gets to interpret it. Therefore,
Scratch Live needs to be able to handle a
wide range of signals, and be configurable
to use them optimally. Calibrating is just
configuring the software to your situation.
Calibration is equally important for both
vinyl and CD users of Scratch Live.
There are two parts to the Scratch Live
control signal: The directional tone, and
the noise map.
Listening to the control vinyl, the
directional tone is the 1 kHz tone. The
noise map sounds like random noise over
the top of the tone.
The directional tone provides the
current speed and direction of the record,
while the noise map tells the software
precisely where on the record the needle
is currently.
The Noise Threshold
A threshold is a lower limit, below which
a process will not occur. In the case of
Scratch Live, the noise threshold is the
limit below which the input signal will not
be interpreted as control signal; in other
words if it’s below the threshold, it is
considered noise and ignored.
This setting is necessary because a
stylus is very sensitive, and will inevitably
pick up noise from the environment as
well as the signal on the record, especially
in the noisy environment of a live show.
Connecting A Mic
Connect an optional standard dynamic
microphone to the SL1 Mic Input using
a ¼" unbalanced Tip-Sleeve cable or
adaptor. Connect the Mic THRU output to
a Mic input on your DJ mixer.
Use the MIC GAIN knob on the SL1 to
attenuate the mic input level. This is only
a trim control, and will not turn off the mic
when turned all the way down (counter-
clockwise). Use the Mic controls on your
mixer to turn the mic off.
Optional Power Supply
Connect an external power supply to the
SL1 to power the THRU channels when
USB power is not present. This allows
you to play vinyl or CDs without a host
computer; useful for permanent installations
or using more than one computer.
The power supply is 9 volts DC, 300 mA,
using a P6 type barrel plug. Any substitute
must meet these specifications.
-(5.5mm)
+(2.5mm)
Kensington Security Slot
You can use a Kensington
security cable to attach the SL1
to an immovable object. Each
side of the SL1 has a Kensington
Security Slot. Refer to the instructions
provided with your Kensington Lock.