Rane ASL3 Operator'S Manual Download Page 8

Page: 8 / 38

HOW TO CALiBRATe SCRATCH Live

With music playing in the background, put your
needle on the record with the turntable

stopped

If you are using CD players, the same rules
apply. Have the CD deck paused or stopped
while calibrating.

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.
Start both turntables or CD players. You will
see green rings appear in the scope view,

shown above.

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.

pLayIng ReguLaR vInyL and cdS

nOTe: the SL 3 must be powered by USB or
the supplied external power supply for the
DeCk THRUs to work.

  While  Scratch  Live  is  not  running,  and  the
SL 3 is powered by the external supply, the deck
thrus  on  the  SL  3  will  always  be  on,  allowing
you to play regular CDs and vinyl with your CD
players or turntables.
  When  the  SL  3  is  powered  by  the  universal
power supply, and then Scratch Live is launched,
the deck thrus are still on. This allows a laptop to
be connected during a set (when using the deck
thrus) with no audio interruption.
  If  the  SL  3  is  not  powered  by  the  universal
power  supply  when  Scratch  Live  is  launched
(USB connected), the deck thrus will be off, but
can be turned on in Scratch Live.
  To  turn  the  thrus  off  and  on  in  Scratch  Live,
click  on  the  thru  button  for  the  respective
channel  in  Scratch  Live.  This  will  change  the
state  of  the  channels  to  thru  mode,  sending
audio direct from the SL 3 inputs to your mixer.

See “THRU BUTTOnS” On PAGe 13.

pOWeR SuppLy

Connect  the  barrel  connector  of  the  power
supply  to  the  7.5  VDC  jack  on  the  SL  3.  Plug
the power supply into an AC outlet. The yellow
POWER indicator will light on the SL 3.
  The universal power supply includes different
input  plugs  for  the  USA,  Europe,  UK  and
Australia. The USA plug is attached at the factory
— you may need to replace it in your country.
  To  remove  a  plug,
PUSH  the  button
while turning the outer
rim counterclockwise.
  To  attach  a  plug,
rotate  it  to  fit  into
the  supply  and  turn
clockwise until it locks
in place.
The  power  supply  is  regulated  7.5  volts  DC,  1
amp, using a P6 type barrel plug. Any substitute
must meet these specifications.