Monoprice Stage Right STi12 User manual

STi12 2x2 USB Audio Recording Interface
P/N 625909
User's Manual

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SAFETY WARNINGS AND GUIDELINES
Please read this entire manual before using this device,
paying extra attention to these safety warnings and
guidelines. Please keep this manual in a safe place for future
reference.
•This device is intended for indoor use only.
•Do not expose this device to water or moisture of
any kind. Do not place drinks or other containers
with moisture on or near the device. If moisture
does get in or on the device, immediately remove
it from its power source and allow it to fully dry
before reapplying power.
•Do not touch the device or any connected cables
with wet hands.
•Do not expose this device to excessive vibration,
extreme force, shock, or fluctuations in
temperature or humidity.
•Do not expose this device to excessively high
temperatures. Do not place it in, on, or near a heat
source, such as a fireplace, stove, radiator, etc. Do
not leave it in direct sunlight.

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•Do not place or install this device in an area where
it can be exposed to excessive amounts of dust,
humidity, oil, smoke, or combustible vapors.
•Clean using a soft, dry cloth only. Do not use
chemical cleaners, solvents, or detergents. For
stubborn deposits, moisten the cloth with warm
water.
•This device has no user serviceable parts. Do not
attempt to open, service, or modify this device.
INTRODUCTION
Besides providing the hardware inputs for your
microphones or instruments, audio interfaces are critical for
improving the sound of your recordings. Not only will you
achieve better sound, you'll also be able to record multiple
tracks at once, allowing for collaboration with others or true
stereo recordings. The Stage Right™ STi12 USB Audio
Recording Interface does all of the above and then some.
Studio quality recording has never been as accessible.

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FEATURES
•44.1kHz, 48kHz, 88.2kHz, and 96kHz sampling rates
with 24-bit audio bit depth
•Dedicated microphone input, instrument input, line
input, and two sets of stereo outputs
•Built-in Analog-to-Digital Converter (ADC) with
101dB dynamic range
•Built-in Digital-to-Analog Converter (DAC) with
105dB dynamic range
•True plug-n-play device, no drivers required
•Compatible with PCs running Microsoft® Windows®
or Apple® Mac® OS X®
•Compatible with all popular Digital Audio
Workstation software
•Includes Kensington Security Slot™(lock not
included)

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CUSTOMER SERVICE
The Monoprice Customer Service department is dedicated
to ensuring that your ordering, purchasing, and delivery
experience is second to none. If you have any problem with
your order, please give us an opportunity to make it right.
You can contact a Monoprice Customer Service
representative through the Live Chat link on our website
www.monoprice.com or via email at
[e-mail]. Check the website for support
times and links.
PACKAGE CONTENTS
Please take an inventory of the package contents to ensure
you have all the items listed below. If anything is missing or
damaged, please contact Monoprice Customer Service for a
replacement.
1x USB Audio Recording Interface
1x USB Cable (Type-A to Type-B)
1x User's Manual

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PRODUCT OVERVIEW
Front Panel
1. MIC GAIN1: Controls the input volume of MIC 1
INPUT. The LED around the base of the knob
illuminates when the signal is being clipped.
2. GAIN2: Controls the input volume of INPUT2. The
LED around the base of the knob illuminates when
the signal is being clipped.
3. LED: The LED illuminates when power is applied via
the USB connection.

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4. MIC 1 INPUT: Combination 1/4" TRS/XLR jack for
connecting a condenser or dynamic microphone.
5. +48V: Switches +48V phantom power on or off.
Phantom power is on when the button is
depressed.
6. INPUT2: 1/4" TRS instrument/line input for
connecting an instrument level or line level device.
7. LINE/INST: Switches INPUT2 to accept a line level
or instrument level input.
8. DIRECT MONITOR: Switches direct monitoring on or
off. When direct monitoring is on, you can hear the
instrument and microphone inputs in your
headphones.
9. HEADPHONES: 1/4" TRS jack for connecting
headphones.
10. MONITOR: Master control for adjusting the input
and output monitoring levels.

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Rear Panel
11. K-SLOT: Kensington Security Slot™ for use with a
security lock to prevent theft. Lock not included.
12. USB: USB connector for connecting the device to
your computer using the included USB cable. The
device receives all the power it needs from the USB
connection. No drivers are required.
13. PHONE: 3.5mm TRS connector for connecting a
phone, mp3 player, or other audio device using the
included 3.5mm TRRS audio cable.
14. LINE OUTPUTS: Two balanced 1/4" TRS jacks for
connecting powered speakers or an amplifier.

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INSTALLATION
Perform the following steps to connect the USB Audio
Recording Interface with your computer. To download the
latest drivers, firmware, manuals, etc., go to
www.monoprice.com and type the P/N into the search bar.
If available, support files are linked at the bottom of the
product page.
1. Place the device on a flat surface near your
computer.
2. Rotate the MIC GAIN1, GAIN2, and MONITOR knobs
fully counterclockwise to the minimum position.
3. Place the +48V switch in the off position (out).
4. Ensure that your computer is powered on.
5. Plug one end of the included USB cable into the
USB port on the device, then plug the other end
into an available USB port on your computer. Your
computer will automatically install the necessary
USB drivers and the LED on the front panel will
illuminate. No external drivers are required.

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6. Open your computer's audio interface and ensure
that STi12 USB is selected as the audio input and
output device.
Congratulations, your USB Audio Recording Interface is
installed and ready for use!
OPERATION GUIDELINES
•To prevent transient spikes from damaging your
equipment, always turn the two MIC GAIN1, GAIN2,
and MONITOR knobs fully counterclockwise to the
minimum position before making or breaking any
connections.
•Even if using a condenser microphone that requires
+48V phantom power, ensure that the +48V switch
is in the off position (out) before plugging a
microphone into the MIC 1 INPUT jack. Turn on
+48V phantom power only when a condenser
microphone is connected.
•The PHONE jack on the rear panel allows you to
play music from a mobile device, so you can play or

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sing along with audio tracks for recording or
practice purposes.
TECHNICAL SUPPORT
Monoprice is pleased to provide free, live, online technical
support to assist you with any questions you may have
about installation, setup, troubleshooting, or product
recommendations. If you ever need assistance with your
new product, please come online to talk to one of our
friendly and knowledgeable Tech Support Associates.
Technical support is available through the online chat
button on our website www.monoprice.com or through
email by sending a message to [e-mail]. Check
the website for support times and links.
To download the latest drivers, firmware, manuals, etc., go
to www.monoprice.com and type the P/N into the search
bar. If available, support files are linked at the bottom of the
product page.

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SPECIFICATIONS
Main Unit
P/N
625909
Sampling Rates
44.1kHz, 48kHz, 88.2kHz,
and 96kHz
Bit Depth
24-bit
ADC Dynamic Range
101dB A-Weighted (all
inputs)
ADC Chipset Dynamic
Range
114dB
DAC Dynamic Range
105dB A-Weighted (all
outputs)
DAC Chipset Dynamic
Range
114dB
Compatible Operating
Systems
Microsoft® Windows®,
Apple® Mac® OS X®

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Mic Input
Frequency Response
20Hz ~ 20kHz
Gain Range
0 ~ 1686mVrms
THD
-87dB
Background Noise (EIN)
189µVrms
Dynamic Range
87dB
Maximum Input Gain
35mVrms
Instrument Input
Frequency Response
20Hz ~ 20kHz
Gain Range
0 ~ 291mVrms
THD
-78dB
Background Noise (EIN)
203µVrms
Dynamic Range
78dB
Maximum Input Gain
123mVrms

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Line Input
Frequency Response
20Hz ~ 20kHz
Gain Range
0 ~ 380mVrms
THD
-76dB
Background Noise (EIN)
298µVrms
Dynamic Range
76dB
Maximum Input Gain
205mVrms
Phone Input
Frequency Response
20Hz ~ 20kHz
Gain Range
0 ~ 1390mVrms
THD
-89dB
Background Noise (EIN)
301µVrms
Dynamic Range
89dB
Maximum Input Gain
935mVrms

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Line Output
THD
-74dB
Background Noise
207µVrms
Dynamic Range
74dB
REGULATORY COMPLIANCE
Notice for FCC
This device complies with Part 15 of the FCC rules. Operation
is subject to the following two conditions: (1) this device
may not cause harmful interference, and (2) this device
must accept any interference received, including
interference that may cause undesired operation.
Modifying the equipment without Monoprice's
authorization may result in the equipment no longer
complying with FCC requirements for Class B digital devices.
In that event, your right to use the equipment may be
limited by FCC regulations, and you may be required to

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correct any interference to radio or television
communications at your own expense.
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or
more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment
and receiver.
•Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.

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•Consult the dealer or an experienced radio/TV
technician for help.
Notice for Industry Canada
This Class B digital apparatus complies with Canadian ICES-
003.
Cet appareil numérique de la classe B est conforme à la
norme NMB-003 du Canada.
Monoprice™, Stage Right™, the Stage Right logo, and all
Monoprice logos are trademarks of Monoprice Inc.
Microsoft® and Windows® are either registered trademarks
or trademarks of Microsoft Corporation in the United States
and/or other countries.
Apple®, Mac®, and OS X® are trademarks of Apple Inc.,
registered in the U.S. and other countries.
Kensington® is a registered trademark of ACCO Brands
Corporation. Kensington Security Slot™ is a trademark of
Kensington Computer Products Group.