Mobile UA

USB Audio Interface

Mobile UA: USB Audio Interface

Next-Generation USB Audio Playback Interface with S1LKi DSP Technology

Features

This extremely compact, bus-powered USB D/A converter plays both PCM audio and ultra-high-resolution DSD audio, providing extremely high-quality sound for on-the-go music production, live performance, and listening enjoyment. With up to four channels of low-latency output, the Mobile UA can accommodate multiple listeners or independent click tracks and cue monitoring.

  • World’s smallest USB audio interface that supports both ASIO and DSD
  • High-quality audio playback from Roland’s newly-developed S1LKi audio engine
  • Native playback of 2.8 MHz DSD audio
  • Ultra-compact four-channel audio output
  • High-powered 158 MW + 158 MW (at 40 ohm load) headphone amp
  • Supports ASIO and Core Audio; designed for low-latency operation
S1LKi DSP Audio Engine Supports Both DSD and Standard PCM Playback

The Mobile UA supports native playback of DSD audio sampled at 2.8 MHz, and our proprietary S1LKi audio engine also reproduces traditional 44.1 kHz and other PCM audio with extreme precision. By using the same type of 1-bit D/A converter used in DSD, the resulting conversion produces ultra-smooth, unclouded sound when compared to existing D/A conversion.

Four Outputs and Ultra-Compact Design for Mobile Production and Live Performance

Ultra-compact and bus powered, the Mobile UA features quality stereo mini-jacks on both the left and right sides. Two people can monitor audio at the same time, or a single musician can use one side for the main output and the other for cue monitoring or a click track. Low-latency ASIO and Core Audio performance provides compatibility with a wide range of professional applications.

High-Performance Headphone Monitoring in Loud Environments

Featuring two channels of 158 MW output at 40 ohms, the Mobile UA’s high-level headphone out supports monitoring situations where isolation from ambient sounds, nearby performers, and crowd noise is essential.

Low Latency for Music Creation and Sound Editing

The Mobile UA inherits Roland’s acclaimed VS Streaming technology for low latency and stable operation, and USB audio streaming and DSP are processed on a single custom chip. This provides mobile music creators pro-level performance for playing virtual instruments and editing tracks in DAW software.

What is DSD?

DSD, or Direct Stream Digital, is a technology for digitising audio using much higher frequencies than the typical PCM format. Each sample is recorded as a single bit at a sampling rate of 2.8 MHz, which is 64 times that of audio CDs (44.1 kHz). DSD formats that use 5.6 MHz, or 128 times that of CDs, are also widely used. Because DSD is capable of recording at higher levels of precision than audio CDs, it is primarily used for recording and music distribution.

Audio & Video

Video

Specs

System
Number of Audio Playback Channels
PCM format: 4 channels / 2channels (selectable by "Output Mode")
DSD format: 2 channels
Signal Processing
PCM format
PC interface: 32 bits
DA Conversion *1: 1 bit, 32 bits

*1 When "S1LKi Mode" is valid, DA conversion operates on 1 bit.

DSD format
PC interface: 1 bit
DA Conversion: 1 bit
Sampling Rate
PCM format
PC interface: 352.8 kHz *2, 192 kHz, 176.4 kHz, 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz
DA Conversion *3: 3.072 MHz, 2.8224 MHz, 192 kHz, 176.4 kHz

*2 If the sampling rate is 352.8 kHz, the number of channels is limited to two channels, and playback is possible only via ASIO/Core Audio.
*3 When "S1LKi Mode" is valid, DA conversion operates on 3.072 MHz or 2.8224 MHz.

DSD format:
PC interface: 5.6448 MHz *4, 2.8224 MHz
DA Conversion: 2.8224 MHz

*4 5.6448 MHz DSD data is down-converted to 2.8224 MHz for playback.
DSD Format Playback Method
DoP version 1.0
Interface
Hi-Speed USB
Connectors
PHONES jack: Stereo miniature phone type
PHONES/LINE jack: Stereo miniature phone type
USB port: USB Type micro B
Characteristics
PHONES, PHONES/LINE
Nominal Output Level: -4 dBu

Maximum Output Level: +14 dBu

Maximum Output Power:
158 mW + 158 mW (L + R, 40 ohms)
44 mW + 44 mW (L + R, 300 ohms)

Headroom: 18 dB

Frequency Response:
192.0 kHz: 20 Hz–60 kHz (+0/-0.4 dB), 20 Hz–90 kHz (+0/-3 dB)
176.4 kHz: 20 Hz–60 kHz (+0/-0.5 dB), 20 Hz–80 kHz (+0/-2 dB)
96.0 kHz: 20 Hz–44 kHz (+0/-0.2 dB)
88.2 kHz: 20 Hz–40 kHz (+0/-0.2 dB)
48.0 kHz: 20 Hz–22 kHz (+0/-0.2 dB)
44.1 kHz: 20 Hz–20 kHz (+0/-0.2 dB)

Residual Noise Level: -101 dBu typ. (IHF-A)

Dynamic Range: 115 dB typ.
Others
Power Supply
USB Bus Power
Current Draw
500 mA
Accessories
Owner’s Manual
Leaflet “USING THE UNIT SAFELY”
USB cable
* 0 dBu = 0.775 Vrms
Size and Weight
Width
108.2 mm
4-5/16 inches
Depth
65 mm
2-9/16 inches
Height
16 mm
0-11/16 inches
Weight
300 g
0 lbs. 11 oz.

Downloads

Updates & Drivers

Support

If you have questions about operating your Roland or BOSS product, please log in to MyRoland where you can log an enquiry with one of our product specialists.

In addition, we have a library of Updates and Drivers and Support Documents that you can download and reference. If Support Documents are available for this product, they will be listed below.

Product Manuals