USB Audio/MIDI Interface

USB Audio Interface with FX for Guitarists & Singer/Songwriters

  • USB
  • FPT


(Oct. 23, 2013)
You can download the Driver Ver.1.0.0 for OS X Mavericks (10.9).

(Oct. 21, 2013)
You can download the Driver Ver.1.0.1 for Windows 8.1 / 8.

(Apr. 6, 2011)
Meet the latest QUAD-CAPTURE with a pair of premium VS Preamps onboard, plus superb 24-bit/192 kHz audio quality, ultra-low latency performance, and more!

USB Audio Interface with FX for Guitarists & Singer/Songwriters

The UA-4FX is a compact and portable 24-bit/96 kHz USB audio interface featuring genuine Roland COSM preamp emulation technology and high quality effects. The UA-4FX provides mobile recording, built-in effects, and great sound in a compact package making it ideal for guitarists, singer/songwriters, or any musician on the go.


  • - Record and playback high-resolution audio of your music up to 24-bit/96 kHz
  • - Phantom powered XLR Input for use with condenser microphones — perfect for vocals
  • - 1/4" Hi-Z input designed to get a better sound when recording electric guitar and bass
  • - Tube Mic Preamp Simulator provides warm tones through Roland's COSM Technology
  • - 14 Onboard Advanced FX: Amp Simulator, Chorus, Delay, Reverb, Enhancer, more
  • - MIDI in/out ports for MIDI recording, playback, control, and sequencing
  • - USB bus powered; no AC adaptor required - ideal for mobile use
  • - 1/8" input for electret condenser microphones, 1/4” input for dynamic microphones
  • - Optical S/PDIF I/O for direct connection of digital audio devices
  • - Low-latency drivers for responsive multitrack recording:
  • - WDM (Windows) / ASIO 2.0 (Windows) / Core Audio (Mac OS X)
  • - Fast and stable MIDI transmission using proprietary FPT advanced driver technology
  • - 5 segment stereo LED Meters for mixing and checking levels
  • - Dolby Digital & DTS 5.1 channel surround sound through S/PDIF output (Windows only)
  • - Digitize your vinyl albums and cassette tape collection

High-Quality Audio

If you demand pristine performance, the UA-4FX can handle audio at up to 24-bit/96kHz resolution. Send audio in and out of the UA-4FX via its analog I/O or, for the ultimate in high-end audio quality, take advantage of its digital audio output (optical). Windows XP users can use the optical output for Dolby Digital or DTS 5.1 Surround output as well.

Built-In Effects

Great audio and versatile MIDI combined with a quality suite of built-in effects make the UA-4FX an irresistible package for computer-recording enthusiasts on a budget. Why pay extra for outboard or plug-in effects when the UA-4FX provides a quality, low-latency COSM tube mic-preamp simulator, multi-band compressor/limiter for mastering, amp-simulator and distortion/chorus/delay for guitar, center cancel, reverb, noise suppressor, and more.

Cross-Platform Compatibility

Good news for both Mac and PC users — the UA-4FX is cross-platform compatible. It supports WDM, ASIO 2.0, and Mac OS X Core Audio formats. Enjoy low-latency audio performance on both platforms!

Low-Latency MIDI

Great audio is only part of what makes the UA-4FX a star performer. Connect your synths, modules, and controllers via MIDI, and enjoy ultra-fast,stable performance thanks to FPT (Fast Processing Transmission) technology. A single USB cable provides both the MIDI and audio links between your computer and the UA-4FX.

Portable Power

The UA-4FX receives its power via USB, which means no AC adapter is required. Great for musicians on the go!

Bundled Software

For Windows-based musicians just getting started, UA-4FX includes the Cakewalk Production Plus Pack, a feature-rich recording software bundle consisting of SONAR LE, Project5 LE, and Dimension LE for PC-based recording. The CD-ROM also includes the latest ASIO, WDM, and MME drivers for Windows XP and Vista (32-bit versions), plus Core Audio drivers for Mac OS X.

Main Specifications

Number of Audio Record/Playback Channels
Record: 1 pair of stereo
Playback: 1 pair of stereo
Full duplex (Except 96 kHz)
Signal Processing
PC Interface 24-bit
AD/DA Conversion 24-bit (linear)
Internal Processing 32-bit (Effect processing)
Sampling Frequency
Digital Output 44.1/48/96 kHz
Digital Input 44.1/48/96 kHz
AD/DA Conversion 44.1/48/96 kHz

* ADVANCE SWITCH = OFF: 44.1 kHz only
Frequency Response
96 kHz: 20 Hz to 40 kHz (+1 dB/-2 dB)
48 kHz: 20 Hz to 22 kHz (+1 dB/-1 dB)
44.1 kHz: 20 Hz to 20 kHz (+1 dB/-1 dB)
Nominal Input Level
Line Input: -10 dBu
MIC Input (XLR): -45 to -12 dBu
MIC Input (non-XLR): -45 dBu
GUITAR Input: -30 dBu
Nominal Output Level
Line Output Jacks -10 dBu
Residual Noise Level
-105 dBu or less (SN ratio: 108 dB, typ.)
* Input terminated with 1 k ohms, MAIN VOLUME: 0 dB, Monitor: OFF, IHF-A typ.
Digital Audio Input/Output (Optical type, conforms to IEC60958 consumer format: PCM/AC3)
Noise Suppressor, Enhancer, Multiband Compressor/Limiter
Sound Enhancement
Center Cancel, High Boost, Low Boost, Reverb
Voice-change, Amp-Simulator, Distortion, Chorus, Delay
Tube-amp simulator
Tube-Amp-Simulator, Multiband Compressor/Limiter
Line Input Jacks (L, R) (RCA phono type)
MIC Input Jack (XLR type, balanced, phantom power +48 V)
MIC Input Jack (Miniature phone type, plug-in powered)
GUITAR/MIC Input Jack (1/4 inch phone type)
Line Output Jacks (L, R) (RCA phono type)
Headphones Jack (Stereo 1/4 inch phone type)
Digital Input Connector (Optical)
Digital Output Connector (Optical)
MIDI Connectors (IN/OUT)
USB Connector (USB Type B)
Power Supply
Supplied from the computer
Current Draw
360 mA
Owner’s Manual
USB cable
Driver CD-ROM
Cakewalk Production Plus Pack CD-ROM
Licence agreements

System Requirements

OS: Microsoft® Windows Vista® / Windows® XP Home / XP Professional SP2 or later*
Computer: Windows compatible PC equipped with a USB port
CPU/Clock: Pentium® Processor 1 GHz or higher
Memory(RAM): 256 MB or more (1 GB or more is recommended)
* This product does not support Windows XP Media Center Edition or XP Professional x64.
OS: Mac OS X 10.3.9 or later
Computer: Apple® Macintosh® series with on-board USB port
CPU/Clock: Intel Processor or PowerPC G4/867 MHz or higher
Memory(RAM): 256 MB or more (512 MB or more is recommended)
Cakewalk Production Pack Software
Operating System: Windows XP/Vista only
Processor: Intel® Pentium® 4 1.3 GHz or AMD Athlon™ XP 1500+ RAM - 256 MB RAM
Hard Drive: 100 MB free hard disk space
Screen Resolution: 1024 X 768, 16-bit color CD-ROM drive (for installation) Windows-compatible audio card/interface
* Cakewalk Production Plus Pack does not run on Macintosh.

Size and Weight

Width (W)
171 mm6-3/4 inches
Depth (D)
127 mm5 inches
Height (H)
44 mm1-3/4 inches
335 g0 lbs. 12 oz.

* USB 2.0 Compatible. Works as a USB 1.1 device without changing the specifications and performance. .

* Macintosh computers running Microsoft Windows are not supported.

* This product has been tested on representative computers that meetthe system requirements, but we cannot guarantee that it will operateon any computer that meets these requirements. Please be aware that even under the same conditions, differences in the operatingenvironment may produce differences in processing capability.

* 0 dBu = 0.775 Vrms

All specifications and appearances are subject to change.


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