Operator`s manual
RANE SL3 FOR SERATO SCRATCH LIVE • OPERATOR’S MANUAL 2.5.0
7
Playing Regular Vinyl and CDs
NOTE: the SL3 must be powered by 
USB or the supplied external power 
supply for the DECK THRUs to work.
  If external power is connected, the SL3 
is self-powered and power is not used 
from the USB port.
  If external power is not connected, the 
SL3 draws power from the USB port. 
Power switching is automatic and the 
device continues to operate uninterrupted 
as long as a power sources is available. 
  If you wish to use the SL3 Thru outputs 
when a computer is not connected, you 
will need to connect the optional external 
power supply. Thrus are turned on and off 
in the Control Panel.
  To turn the Thrus off and on in Scratch 
Live, click on the THRU button just above 
each Virtual Deck for the respective 
channel. This will change the state of the 
channels to Thru Mode, sending audio 
direct from the SL2 inputs to your mixer.
See “Thru Mode” on page 16.
Power Supply
Connect the barrel connector of the power 
supply to the 7.5 VDC jack on the SL3. 
Plug the power supply into an AC outlet. 
The yellow POWER indicator will light on 
the SL3.
  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 t 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 
specications.
-(5.5mm) +(2.5mm)
LOCK
LOCK
PUSH
OPEN
OPEN
USB Drivers
The SL3 is a dual personality device. 
When using Serato Scratch Live, 
proprietary Serato Audio Research 
drivers are used in place of Rane ASIO 
(Windows) and Core Audio (Mac) drivers. 
The included Rane drivers are used when 
Scratch Live is not running. 
  Rane ASIO and Core Audio drivers 
allow the SL3 to act as a 6-playback 
and 6-record external USB sound card 
for use with multiple third-party software 
applications supporting Core Audio or 
ASIO. ASIO and Core Audio drivers are 
multi-client, meaning they allow multiple 
applications on a computer to share 
the device at the same time. ASIO and 
Core Audio drivers are not available on a 
machine when Scratch Live is running.
  The ASIO and Core Audio drivers are 
included in the Scratch Live installer as an 
option. See the instructions in “Installing 
Scratch Live” on page 8.
ASIO (Windows)
The SL3 uses a low-latency, multi-client, 
ASIO device driver to interface with 
software applications other than Scratch 
Live on Windows operating systems. 
Multi-client ASIO allows different audio 
software applications to simultaneously 
stream audio to and from the SL3. If the 
same playback channel is selected in 
more than one application, the driver 
mixes the audio from different applications 
before streaming it to the device.
  The driver Control Panel may be 
launched from the Windows Control 
Panel. Select Start > Control Panel > 
Rane SL3.
Core Audio (Macintosh)
The SL3 uses a low-latency, Core Audio 
device driver to interface with software 
applications other than Scratch Live 
on Macintosh operating systems. Core 
Audio allows different audio software 
applications to simultaneously stream 
audio to and from the SL3.
  To launch the SL3 driver Control Panel, 
open the System Preferences window. 
Locate the SL3 in the “Other” section and 
click the SL3 icon.
Control Panel
The Driver Control Panel supports:
• Analog Input Source: for Aux, Left 
Deck and Right Deck, the Input as 
selected on the SL3 is indicated. The 
mode cannot be changed from the 
control panel.
• Phono Sensitivity: control appears 
as shown in the panel above if Phono 
input is selected on the mixer. Clicking 
on the down-arrow displays a list of 
16 sensitivity settings between 2.5 mV 
and 10 mV in 0.5 mV steps. Choose 
the setting that most closely matches 
the level of a CD input or to the setting 
that provides the highest output without 
clipping.
• Output Source: can be set for 
independently for each of the three 
stereo outputs. Click the USB icon for 
USB playback and the Analog button for 
analog THRU.
• Buffer Size increases or decreases the 
USB driver buffer size. The SL3 drivers 
run very reliably at latencies below 
8 milliseconds. However, computer 
performance and available resources 
(number of apps running) may adversely 
affect streaming audio. If pops and 
clicks are heard in USB audio, try 
increasing the buffer size. In ASIO, total 
round-trip latency = buffer size + device 
latency. In Core Audio, total round-
trip latency = buffer size + software 
application latency + device latency. SL3 
latency is 1.6 ms at 48 kHz and 1.8 ms 
at 44.1 kHz.
• If the SL3 rmware on your computer 
is newer than installed in your SL3, 
the Update Device Firmware panel is 
enabled. Pressing the Update Firmware 
button updates the SL3 rmware to the 
newer version installed with your driver.










