Ratoc Systems RAL-KEB02iP User manual

RAL-KEB02iP
USB_DAC Mode
Setup Guide
Rev. 1.0 01/July/2014
Rev. 2.0 for RAL-KEB02iPL version
01/Nov./2015
RATOC Systems, Inc.
www.ratocsystems.com
Osaka, Japan

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 2
Index
1. Introduction............................................................ 3
1-1.Features ..................................................................................................................4
2. System requirements.............................................. 5
2-1. PC running on Windows 8,7,Vista,XP(SP2 or newer) 32/64bits ...........5
2-2. MacOS X 10.7 or newer ...................................................................................5
2-3. iOS devices, iPhone, iPad and iPod…….…………………………………..6
2-4. Stereo Headphone...............................................................................................6
3. Package contents.................................................... 7
4.Front Panel, Rear Panel Layout.............................. 7
5. Setting up Mac/MacOS X.................................... 13
5-1. Connecting RAL-KEB02iP to Mac USB port...........................................13
5-2. Setting 'Sound Effects' output to Internal Speakers.................................14
5-3. Setting RAL-KEB02iP as an Audio Output...............................................15
5-4. Setting up 'Audio MIDI Setup'Application...............................................16
5-5. Launch and play iTunes or other Music Player application...................17
6. iPhone, iPad, iPod with USB_DAC mode
and Lightning to mini-B cable……………...………18
7. Setting up Windows PC ( Windows 7 )............... 19
7-1. Installation of USB Audio 2.0 Class Driver...............................................19
8. Grade up setting for Windows............................. 25
9. Specifications....................................................... 29
iPod.iPad,iPhone, MacOS X are registered trade mark of Apple Inc.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 3
1. Introduction
Thank you for purchasing RAL-KEB02iP portable USB_DAC. We are confident that
you will enjoy listening Hi-Res music at anywhere, outdoors and in home with your PC
audio system, Mac Book, iPhone, iPad, iPod and WALKMAN. RAL-KEB02iP receives
High-Resolution digital audio data stream. KEB02iP accepts LPCM format up to
24bit/384kHz from 16bit/44.1kHz and DoP(DSD over PCM Standard 1.1 compatible)
format DSD digital music stream up to DSD11.2MHz. KEB02iP passes the DSD stream
to DSD Direct enabled DAC (ESS ES9018K2M) and creates clear and natural sound.
RAL-KEB02iP 2.0L version is fully compatible with iOS USB Host mode Audio. The Host
mode enables Lightning Direct connection and playing back High-Res and DSD native
music with KEB02iP USB DAC mode. KEB02iP works with popular Music Players, such
as Audirvana Plus on MacOS X, foobar2000 with foo_asio_dsd, JRiver Music Center ,
HQPlayer and JPLAY on Windows PC and music AP, ONKYO HF Player on iOS devices.
*1) USB Audio Class 2 Driver for Windows must be downloaded from our site below and
installed prior to use RAL-KEB02ip with Windows PC.
download from www.ratocaudiolab.com/download/driver.htm
*** Note) USB Audio Class 2 Driver was updated on 10/Feb./2016.
to support Windows10/Windows 8.x/Windows 7.
*2)RAL-KEB02iP has two operation mode, iPod Compatible mode and USB_DAC
Compatible mode. These two modes are switchable with slide switch at the front panel
before turning on Power Switch. Refer
iPod Compatible Mode User's Guide to use
KEB02iP with iPod/iPhone/iPad and iOS USB Device Audio mode.
*3)To use iOS USB Host mode Audio, you must set KEB02iP USB_DAC mode and use
Lightning to mini-B cable to connect iOS device and KEB02iP. Also iAP such as
ONKYO HF Player is required to play back High-Res format music or DSD format
music.
*** "Apple", "iPod","iPhone","iPad" and "iOS" are the Registered Trade Mark of Apple, Inc. in USA
or other countries.
**** "RAL" is the Registered Trade Mark of RATOC Systems, Inc. in USA and Japan. "REX"
is the Trade Mark of RICHO Corporation in Japan. RATOC has the license to use it for
RATOC's products.
***** "ES9018K2M" and "SABRE32" are Registered Trade Mark of ESS Technology, Inc in USA.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 4
1-1.Features
●Includes ESS SABRE32™ ES9018K2M Audio file class DAC.
●Fully balanced circuit and balanced earphone output.
●Earphone level switch (High <-> Low).
●Digital Filter Curve selection switch ( Slow <-> Fast)
●Includes reliable 3.7V/1200mAh Li-Polymer Battery(made in Japan).
●Quick Charging time (2hr) and 5.5hr operating time.
USB_DAC mode
●Fully compatible with USB 2.0 (HS 480Mbps) Specifications.
●Fully compatible with USB Audio Class 2.0.
●Accepts DoP Standard 1.1 compliant DSD 11.2896/5.6448/2.8224MHz data
and L-PCM 24bit/16bit:
384kHz/352.8kHz/192kHz/176.4kHz/96kHz/88.2kHz/48kHz/44.1kHz (2ch).
●Fully compatible with MFi iOS USB Host mode Audio specification.
*** This mode requires Lightning to mini-B cable to connect KEB02ip and iPhone,
iPadoriPod.
iPod Legacy support mode
●Fully compatible with USB 2.0 (FS 12Mbps) Specifications.
●Fully compatible with MFi iOS USB Device mode Audio specification.
●Accepts L-PCM 16bit/48kHz/44.1kHz/32kHz (2ch).
*** iOS USB Device mode Audio specification supports these formats does not
support any other formats.
●This mode requires 30P Dock connector to USB-A cable or Lightning to USB-A
cable to connect KEB02ip and iPhone, iPad or iPod.
*** Refer and lean more
iPod Compatible Mode User's Guide about this mode.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 5
2. System requirements
2-1. PC running on Windows 10, 8.1, 8, 7 32/64bits
●One USB 2.0 HS(480Mbps) enabled Host port.
●Internet access to download USB Audio 2.0 Driver for Windows.
●RAL USB Audio Class 2.0 Driver installation required.
*** RAL USB Audio Class 2 Driver was updated on 10/Feb./2016 to support
Windows10/8.x and 7.
●User's Guide, Setup Guide and Grade up Guide are available for download from
RAL_Audiosite.
Note) The knowledge and experience regarding 'Control Panel' for 'Sound Audio
Device', 'Device Manager', Audio Music Player application such as foobar,
MediaPlayer,iTunesandCDRipping applications are required to use
RAL-KEB02iP. Refer to the User Guide, Instruction Guide or Online Help
of these Applications.
2-2. MacOS X 10.7 or newer
●One USB 2.0 HS(480Mbps) enabled Host port.
*** USB 3.x ports support HS mode.
●MacOS X 10.7 or newer.
*** These versions already include USB Audio Class 2 Driver.
You don't need to download and install the driver.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 6
2-3. iOS Devices, iPhone, iPad and iPod
●iPod Legacy support mode.
MustsetMode Select Slide Switch to iPod position(Left) before turning on the
Power.
*** Refer and lean more
iPod Compatible Mode User's Guide about this mode.
●USB_DAC mode.
MustsetMode Select Slide Switch to USB DAC BT position(Center) before
turning on the Power. Must use bundled Lightning to mini-B cable. KEB02ip does
not work properly with other cable.
This mode is compatible with:
- Lightning connector models.
iPodtouch(5
th generation)
iPhone 5, iPhone 5C, iPhone 5S,iPhone 6,iPhone 6 Plus
iPad(4
th generations), iPad mini, iPad mini 2, iPad mini 3
iPadAir,iPadAir2
*** iAP such as "ONKYO HF Player" is required to play back High-Res and DSD music.
2-4. Stereo Earphone
●Stereo earphone equipped with Standard 3.5mm mini Stereo Phone Plug.
●Stereo earphone equipped with balanced cable and Standard 2.5mm mini-mini
phoneplug.
●Impedance 8-Ohm to 110-Ohm

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 7
3. Package contents
RAL-KEB02iP package includes:
●RAL-KEB02iP
●USB 2.0 Cable ( USB-A to mini-B ) for USB_DAC mode x1.
●USB-A to micro-B Cable for charging x1.
●USB-A to iPod 30P Dock cable (0.1m) for iPod Compatible mode x1.
●USB-A to Lightning cable (0.1m) for iPod Compatible mode x1.
●Lightning to mini-B cable (0.1m) for USB_DAC mode x1.
●Silicon Band to bundle iPod/iPhone with KEB02iP.
** AC adapter (DC +5V/1A) is not included in the package.
4. Front Panel, Rear Panel Layout
4-1. Front Panel
(1). Power & Volume Level
Power off : Turn Counter Clock wise to 7 O'clock position and check Click sound and
lighting off PW/LB LED.
Power on: Turn Clock wise from 7 O'clock position and check Click sound and lighting on
PW/LBLED.
Volume level control: adjust Headphone output level to your favorite level.
(2). PW/LB LED.
Light on to indicate the operating state. Green light indicates Battery level is over 3.4V
and Red light indicates Low Battery state below 3.4V. In this case, charging is required.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 8
(3). HP level Slide Switch
Select Headphone output level.
Right position shown in above brings High-Level for high impedance headphones.
Left position shown in above brings Low-Level for Low impedance headphones.
(4). Analog Filter selection Switch.
You can select Analog Filter Curve inside ES9018K2M DAC with this switch.
Right position brings Sharp Roll-Off Curve and Left position brings Slow Roll-off Curve.
(5). 3.5mm mini Jack.
Stereo analog audio output for earphones. Supports 8 Ohm to 110 Ohm impedance.
(6). 2.5mm micro jack ( L –BAL – R )
Analog Audio Balanced amp output to drive 4-wire ( 2 wire for L, 2wire for R) type
earphone.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 9
4-2. Rear panel
(1). Digital Audio Stream Input for iPod/iPhone/iPad
USB-A Connector : Compliant with USB 2.0 Full Speed(12Mbps) Spec.
*KEB02ip works as USB-Host but does not provide charging current from this connector.
It can provide USB Bus_Power to USB device up to 100mA.
*Don’t use this connector at USB_DAC mode. Never connect iPod/iPhone/iPad to this
connector when Mode select Switch is set for USB_DAC mode.
(2). Digital Audio Stream Input for PC/Mac.
USB mini-B Connector : Compliant with USB 2.0 High-Speed(480Mbps) Spec. and
KEB02iP works as the USB Audio Class 2 Audio Device.
*This connector is used in USB_DAC mode. Don't connect any device when iPod
Legacy Support Compatible mode is selected.
(3). DC+5V power input for charging.
USB micro-B Connector : Must connect DC+5V( +0.25V, -0.25V, 0.5A minimum )
Power supply unit to charge internal battery with USB-A to micro USB-B cable.
*AC adapter is not included in
the box. Soled separately.
* Use DC+5V(+0.25V -0.25V)/1 to 2ASwitching type AC adaptor or USB port of PC/Mac.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 10
(4). Mode Select Slide Switch
Use this slide switch to change KEB02iP operation mode. This switch must be set in
Power_OFF state, Volume Knob at the front panel must be set at 7'Oclock position. And
the Volume Knob must be turned clockwise to enable operation mode being selected
by current setting of this switch for iPod Legacy Support mode or USB_DAC mode.
-
iPod position(Left) : iPod Legacy Support mode.
KEB02iP works as an USB Host and iPod/ iPhone/iPad works as an USB Device. Must
be set this position before turning Power_ON KEB02iP to use this mode.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 11
-
USB position(Middle or Right) : USB_DAC mode.
KEB02iP works as an USBAudio Class 2 Device and High-Speed(480Mbps) Device.
Must be set this position before turning Power_ON KEB02iP to connect PC or Mac to
USB mini-B port. KEB02iP works with internal battery and does not require USB BUS
Power at BT position. Must select BT position to connect Apple Camera Connect Kit,
Lightning to USB Camera Adapter or SONY WALKMAN USB Connection canle.
KEB02ip requires USB Bus_Power to charge internal battery at BP position. In this case
you can connect to USB high-speed enabled HOST port of PC or Mac.
**** Must set BT position to use Lightning to mini-B cable to enable iOS USB Host Audio
mode.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 12
(5). LEDs
(5-1) USB(Green)/ iPod(Red)
Lights on Red when succeeded to detect iPod and starts brink to indicate being
communicating successfully with iPod.
(5-2) PCM(Green)/DSD(Red)
Disabled in iPod Legacy support compatible mode. Enabled only in USB_DAC mode.
(5-3) EXTP(Green)
Indicates External DC+5V Power source or USB Bus_Power(BP mode) is being
supplied and KEB02iP is working and charging internal battery with the external
power source or USB Bus_power(BP mode).
(5-4) Charge.
Indicates internal battery is being charged with the external power or USB
Bus_Power(BP mode).

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 13
5. Setting up Mac/MacOS X
5-1. Connecting RAL-KEB02iP to Mac USB port
Getting started with setting up your Mac/MacOS X 10.7 or newer.
(1) Turn off Power of KEB02iP and select USB_DAC mode. And then turn on power of
KEB02iP.
(2) Connect RAL-KEB02iP mini-B port to Mac USB port with USB-A to mini-B cable.
The cable should be compliant with USB High-Speed(480Mbps) certification.
(3) MacOS X will detect and recognize RAL-KEB02iP.
(4) Click on the "System Preferences" app on Dock.
(5) Click on the "Sound" icon at the Hardware row.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 14
5-2. Setting 'Sound Effects' output to Internal Speakers
Click on the "Sound Effects" tab to prevent alerts and effect sounds such as "e-mail
received notification sound" from being routed to Audio System.
Set Play sound effects through 'Internal Speakers'”.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 15
5-3. Setting RAL-KEB02iP as an Audio Output
Click on the "Output" tab and select "RATOC RAL_KEB02iP Audio Out".
This selection will route the sound from iTunes or other Audio Applications to your
Audio system.

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RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 17
5-5. Launch and play iTunes or other Music Player application
Launch iTunes or other Music Player application. Start it and select Music file. You will
listen and enjoy fine and clear sound from your Audio system. To learn more about Music
Player application, refer to User Guide or Online Help of the application.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 18
6. iPhone, iPad, iPod with USB_DAC mode
and Lightning to mini-B cable.
*** Must set Mode Select Slide Switch to USB DAC BT(Center) position and use bundled Lightning
to mini-B cable.
1. Check PW/LB LED of the front panel turns light off and confirm KEB03 is in
Power OFF state.
2. Set Mode Select Slide Switch to USB_DAC BT(Center) position and connect
Headphone/earphone to Audio Out jacks at front panel.
* 3.5mm Single-end Stereo output jack and 2.5mm balanced Stereo output jacks are
not enabled at the same time to save battery energy.
* 2.5mm balanced output is disabled when Single-end stereo headphone is connected to
3.5mm Jack.
3. And then turn Volume Knob clockwise to enable Power ON.
If PW/LB LED does not light on, turn Volume Knob counter clockwise to turn
Power off and connect DC+5V Power Adaptor to Micro-USB connector at
Rear panel. Turn Power ON again and check PW/LB LED lights on.
4. Hook up iPod/iPhone/iPad to KEB02iP with the bundled Lightning to mini-B
cable.
5. Check KEB02iP is being recognized and configured properly by iOS device.
Touch and select 'Settings' -> 'General' -> 'About'. The string, 'Portable
USB-DAC/HPA' will be shown up. If this string is not shown up, remove
the cable and turned off KEB02iP. After a couple of seconds, turn Power KEB02iP ON
and connect the cable again.
6. Launch and start 'Music' player app. on iOS device and select music.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 19
7. Setting up Windows PC Windows PC.
This chapter describes the driver installation and setting on Windows 7 as an example,
these process is almost the same as one on Windows 10, 8.1 or 8.0.
Getting started with setting up Windows 7 ( 32bit or 64bit ) PC.
6-1. Installation of USB Audio 2.0 Class Driver
RAL-KEB02iP requires USB Audio Class 2.0 Driver. You need to install it before
using it. If you forgot it or failed to install the driver, RAL-KEB02iP would not be
configured as a USB Audio Device.
(1) Turn off Power of KEB02iP and select USB_DAC mode. And then turn on power of
KEB02iP.
(2) Check PW/LB LED at the front panel, and wait step (9) below.
(3) Log in as an Administrator. You must log in as an Administrator to install USB Audio Class 2.0
Driver.
(4) Download RATOCAudio Lab DAC Windows10 Driver (ral_win10_driver.zip) from
http://www.ratocsystems.com/english/download/driver/ral_win10_driver.html
and follow the instructions at the site and install the driver.
*** If you had downloaded and installed any previous USB Audio Driver for RAL/REX USB
Audio devices, you must remove them before installing new RAL USB Audio Class 2 Driver for
Windows10 by using "Program and Features" at "Control Panel" .
(5) Click "RAL USB Audio 0330-Driver-Setup.exe", extract all files and run it. User Account Control
window will appear and show RATOC Systems, Inc. as the Verified publisher name. Click 'Yes' to
go to next step.

RAL-KEB02iP (USB_DAC Mode) User's Guide Rev 2.00_L 01/Nov./2015 20
(6) "RAL-KEB02iP installer" will start automatically. Click 'Next' to start installation.
InstallShield will start and show status.
(7) Click 'Install' button at 'Windows Security' dialog box below and continue installing
the driver.
(8) Windows Security dialog box may be shown up again, if so, click 'Install' to continue the
installation.