Roland QUAD-CAPTURE UA-55 (USB 2.0 Audio Interface)



Pro Performance for Portable Production

With a pair of premium VS Preamps onboard, plus superb 24-bit/192 kHz audio quality, ultra-low latency performance, and convenient USB bus power, QUAD-CAPTURE sets a new standard for portable USB 2.0 audio interfaces. Its compact, durable design and pristine sound makes it the perfect foundation for portable, multichannel computer-based productions on the go. With quality and performance that far exceeds its size and price, QUAD-CAPTURE stands at the head of its class.

  • – Two combo XLR/TRS inputs with premium mic preamps (VS Preamps), two TRS outputs, coaxial I/O, headphone out, and MIDI I/O
  • – Graphical Control Panel software provides fast, intuitive control of the VS Preamps
  • – Phantom power, ground lift, and Hi-Z switches
  • – One-click AUTO-SENS function intelligently sets optimal input levels for the preamps
  • – Extreme low-latency VS Streaming driver
  • – Low-noise, wide-range power supply
  • – Compact with durable aluminum body and Direct Box functionality
  • – Bundled with Cakewalk SONAR X1 LE



VS Preamps

QUAD-CAPTURE boasts two premium-grade, digitally controlled mic preamps (VS Preamps) made from the same high-grade components as the preamps found in Roland’s V-Studio 700and M-400 digital mixer. Two XLR/TRS combo inputs are provided for the preamps, plus independent phantom power, low-cut filter, phase invert, and digital compression for each channel. The VS preamps can be controlled easily and intuitively with the included graphical Control Panel software (Mac/PC).


Never before has it been faster or easier to set perfect input levels—simply activate the AUTO-SENS feature with the push of a button, play your connected instruments, and QUAD-CAPTURE automatically sets the ideal recording level for each input. Whether you’re a beginner or a professional, AUTO-SENS is great for quick, fail-safe recordings, saving you setup time and letting you focus on where it starts… the performance.

VS Streaming

QUAD-CAPTURE offers incredible stability and industry-leading low-latency USB performance via Roland’s proprietary VS Streaming technology. All current Mac and PC DAW platforms are supported through ASIO 2.0/WDM (Windows) and Core Audio (Mac).

Low-Noise Power Supply

One of QUAD-CAPTURE’s key “behind-the-scenes” features is its low-noise, wide-ranging power supply. Designed to deliver a clean, balanced input and output, it provides a reliable foundation for any professional audio application or environment. When driven by the USB bus power supply, QUAD-CAPTURE’s power is regenerated, providing the analog circuitry ideal voltage for the very best sound quality and efficiency in mobile environments.

Aluminum Build, DI Functionality

QUAD-CAPTURE is small, strong, and housed in a road-tough aluminum body, so you can transport it anywhere with the confidence that its premium internal components are securely protected. For live-concert environments, QUAD-CAPTURE also provides Direct-Box (DI) functionality, essential for noise-free live stage use.

SONAR X1 LE Bundle

Every QUAD-CAPTURE package includes a complimentary copy of SONAR X1 LE software for PC that’s designed to work fluidly and seamlessly with the interface. Derived from Cakewalk’s award-winning SONAR X1 DAW software, the LE version give you a powerful set of software tools for writing, recording, editing, and mixing your music.




Number of Audio Record/Playback Channels

Sampling Frequency = 96 kHz, 48 kHz, 44.1 kHz
Recording: 4 channels
Playback: 4 channels
Sampling Frequency = 192 kHz
Recording: 2 channels
Playback: 2 channels

Signal Processing

PC interface
24 bits
AD/DA Conversion
24 bits
40 bits

Sampling Frequency

AD/DA Conversion
192 kHz, 96 kHz, 48 kHz, 44.1 kHz
96 kHz, 48 kHz, 44.1 kHz

Nominal Input Level

Input jacks 1, 2 (XLR type)
-60 to -6 dBu
Input jacks 1, 2 (1/4-inch TRS phone type)
-50 to +4 dBu

Nominal Output Level

+0 dBu (balanced)


14 dB

Input Impedance

Input jacks 1, 2 (XLR type)
4.8 k ohms (balanced)
Input jacks 1, 2 (1/4-inch TRS phone type)
15 k ohms (balanced)

Output Impedance

2 k ohms (balanced)
47 ohms

Frequency Response

192.0 kHz
20 Hz to 90 kHz (+0/-8 dB)
20 Hz to 60 kHz (+0/-2 dB)
96.0 kHz
20 Hz to 40 kHz (+0/-2 dB)
48.0 kHz
20 Hz to 22 kHz (+0/-2 dB)
44.1 kHz
20 Hz to 20 kHz (+0/-2 dB)

Residual Noise Level

INPUT 1, 2 to OUTPUT 1, 2
-95 dBu typ. (GAIN: min., 600 ohms terminated, IHF-A)
* Internal Direct Monitor Mixer setting
* Input channel fader: Unity

Dynamic Range

AD block
INPUT 1, 2: 104 dB typ. (GAIN: min.)
DA block
OUTPUT 1, 2: 109 dB typ.


Input jacks 1, 2 (XLR type / 1/4-inch TRS phone type)
XLR type … balanced (phantom power: DC 48V, 6mA Max per channel)
1/4-inch TRS phone type … balanced (INPUT 1 supports high impedance)
COAXIAL IN connector
COAXIAL OUT connector
Headphone jack (Stereo 1/4-inch phone type)
OUTPUT jacks 1, 2 (1/4-inch TRS phone type (balanced))
MIDI connectors (In, Out)
USB connector
Hi-Speed USB
Digital input/output: Coaxial type (Conforms to IEC60958 consumer format)
MIDI input/output
Power Supply
USB Bus Power
Current Draw
480 mA
Owner’s Manual
Cakewalk SONAR LE DVD-ROM (for Windows)
Driver CD-ROM
USB cable

Size and Weight

Width (W)
185 mm7-5/16 inches
Depth (D)
134 mm5-5/16 inches
Height (H)
44 mm1-3/4 inches
570 g1 lbs. 5 oz.

* 0dBu=0.775Vrms

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Audio interface, Roland, USB 錄音, 電腦錄音

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