MOTU micro express User manual

Mark of the Unicorn
,
Inc.
Mark of the Unicorn, Inc.
1280 Massachusetts Avenue
Cambridge, MA 02138
Business voice: [phone]
Business fax: [phone]
Tech support fax: [phone]
Tech support email: [e-mail]
Web site: http://www.motu.com
User Guide
MIDI Express XT
MIDI Express 128
micro express
micro lite

SAFETY PRECAUTIONS AND ELECTRICAL REQUIREMENTS
WARNING:TO REDUCETHE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSETHIS APPLIANCE TO RAIN OR
OTHER MOISTURE.
CAUTION:TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE
PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING: DO NOT PERMIT FINGERSTO TOUCHTHE TERMINALS OF PLUGS WHEN INSTALLING OR REMOVING
THE PLUG TO OR FROM THE OUTLET.
WARNING: IF NOT PROPERLY GROUNDED THE MOTU USB MIDI interface COULD CAUSE AN ELECTRICAL SHOCK.
The MOTU USB MIDI interface is equipped with a three-conductor cord and grounding type plug which has a grounding prong,
approved by Underwriters' Laboratories and the Canadian Standards Association.This plug requires a mating three-conductor
grounded type outlet as shown in Figure A below.
If the outlet you are planning to use for the MOTU USB MIDI interface is of the two prong type, DO NOT REMOVE OR ALTER THE
GROUNDING PRONG IN ANY MANNER. Use an adapter as shown below and always connect the grounding lug to a known
ground. It is recommended that you have a qualified electrician replace the TWO prong outlet with a properly grounded THREE prong
outlet. An adapter as illustrated below in Figure B is available for connecting plugs to two-prong receptacles.
WARNING: THE GREEN GROUNDING LUG EXTENDING FROMTHE ADAPTER MUST BE CONNECTED TO A
PERMANENT GROUND SUCH ASTO A PROPERLY GROUNDED OUTLET BOX. NOT ALL OUTLET BOXES ARE
PROPERLY GROUNDED.
If you are not sure that your outlet box is properly grounded, have it checked by a qualified electrician. NOTE:The adapter illustrated is
for use only if you already have a properly grounded two-prong receptacle. Adapter is not allowed in Canada by the Canadian
Electrical Code. Use only three wire extension cords which have three-prong grounding type plugs and three-prong receptacles which
will accept the MOTU USB MIDI interface plug.
IMPORTANT SAFEGUARDS
1. Read instructions - All the safety and operating instructions should be read before operating the MOTU USB MIDI interface.
2. Retain instructions - The safety instructions and owner's manual should be retained for future reference.
3. Heed Warnings - All warnings on the MOTU USB MIDI interface and in the owner's manual should be adhered to.
4. Follow Instructions - All operating and use instructions should be followed.
5. Cleaning - Unplug the MOTU USB MIDI interface from the computer before cleaning and use a damp cloth. Do not use liquid or
aerosol cleaners.
6. Overloading - Do not overload wall outlets and extension cords as this can result in a risk of fire or electrical shock.
7. Power Sources - This MOTU USB MIDI interface should be operated only from the type of power source indicated on the marking
label. If you are not sure of the type of power supply to your location, consult your local power company.
8. Power-Cord Protection - Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed
upon or against them. Pay particular attention to cords and plugs, convenience receptacles, and the point where they exit from the
MOTU USB MIDI interface.
9. Lightning - For added protection for the MOTU USB MIDI interface during a lightning storm, unplug it from the wall outlet.This will
prevent damage to the MOTU USB MIDI interface due to lightning and power line surges.
10. Servicing - Do not attempt to service this MOTU USB MIDI interface yourself as opening or removing covers will expose you to
dangerous voltage and other hazards.Refer all servicing to qualified service personnel.
11. Damage Requiring Service - Unplug the MOTU USB MIDI interface from the computer and refer servicing to qualified service
personnel under the following conditions.
a. When the power supply cord or plug is damaged.
b. If liquid has been spilled or objects have fallen into the MOTU USB MIDI interface.
c. If the MOTU USB MIDI interface has been exposed to rain or water.
d. If the MOTU USB MIDI interface does not operate normally by following the operating instructions in the owner's manual.
e. If the MOTU USB MIDI interface has been dropped or the cabinet has been damaged.
f. When the MOTU USB MIDI interface exhibits a distinct change in performance, this indicates a need for service.
12. Replacement Parts - When replacement parts are required, be sure the service technician has used replacement parts specified by
the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or
other hazards.
13. Safety Check - Upon completion of any service or repairs to this MOTU USB MIDI interface, ask the service technician to perform
safety checks to determine that the product is in safe operating conditions.
ENVIRONMENT
Operating Temperature: 10°C to 40°C (50°F to 104°)
AVOIDTHE HAZARDS OF ELECTRICAL SHOCK AND FIRE
Do not handle the power cord with wet hands.Do not pull on the power cord when disconnecting it from an AC wall outlet. Grasp it by
the plug.
INPUT
Line Voltage: 100 - 120 volts AC, RMS (US and Japan) or 220 - 250 volts AC, RMS (Europe). Frequency: 47 - 63 Hz single phase.
Power: 7 watts maximum.
CAUTION: DANGER OF EXPLOSION IF BATTERY IS REPLACED. REPLACE ONLY WITHTHE SAME OR EQUIVALENT
TYPE RECOMMENDED BYMANUFACTURER. DISPOSE OF USED BATTERY ACCORDING TO MANUFACTURER’S
INSTRUCTIONS.
3-prong plug
Grounding prong
Properly grounded 3-prong outlet
Grounding lug
Screw
3-prong plug
Adapter
Make sure this is connected to a
known ground.
Two-prong receptacle
Figure A
Figure B

Mark of the Unicorn License Agreement and Limited Warranty on Software
TO PERSONS WHO PURCHASE OR USE THIS PRODUCT: carefully read all the terms and conditions of this agreement
before using this software package. Using this software package indicates your acceptance of the terms and conditions of this
license agreement.
Mark of the Unicorn, Inc. (“MOTU”) owns both this program and its documentation. Both the program and the documentation are
protected under applicable copyright laws.Your right to use the program and the documentation are limited to the terms and
conditions described herein.
License
YOU MAY:(a) use the enclosed program on a single computer; (b) physically transfer the program from one computer to another
provided that the program is used on only one computer at a time and that you remove any copies of the program from the
computer from which the program is being transferred; (c) make copies of the program solely for backup purposes.You must
reproduce and include the copyright notice on a label on any backup copy.
YOU MAY NOT: (a) distribute copies of the program or the documentation to others; (b) rent, lease or grant sublicenses or other
rights to the program; (c) provide use of the program in a computer service business, network, time-sharing, multiple CPU or
multiple user arrangement without the prior written consent of MOTU; (d) translate or otherwise alter the program or related
documentation without the prior written consent of MOTU.
Term
Your license to use the program and documentation will automatically terminate if you fail to comply with the terms of this
Agreement. If this license is terminated you agree to destroy all copies of the program and documentation.
Limited Warranty
MOTU warrants to the original licensee that the disk(s) on which the program is recorded be free from defects in materials and
workmanship under normal use for a period of ninety (90) days from the date of purchase as evidenced by a copy of your receipt.
If failure of the disk has resulted from accident, abuse or misapplication of the product, then MOTU shall have no responsibility to
replace the disk(s) under this Limited Warranty.
THIS LIMITED WARRANTY AND RIGHT OF REPLACEMENT IS IN LIEU OF, AND YOU HEREBY WAIVE, ANY AND ALL
OTHER WARRANTIES, BOTH EXPRESS AND IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE LIABILITY OF MOTU PURSUANT TO THIS
LIMITED WARRANTY SHALL BE LIMITED TO THE REPLACEMENT OF THE DEFECTIVE DISK(S), AND IN NO EVENT
SHALL MOTU BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED TO
LOSS OF USE, LOSS OF PROFITS, LOSS OF DATA OR DATA BEING RENDERED INACCURATE, OR LOSSES
SUSTAINED BY THIRD PARTIES EVEN IF MOTU HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS WHICH MAY VARY FROM STATE TO STATE. SOME STATES
DO NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR CONSEQUENTIAL DAMAGES, SO THE ABOVE
LIMITATION MAY NOT APPLY TO YOU.
Update Policy
In order to be eligible to obtain updates of the program, you must complete and return the attached Mark of the Unicorn
Purchaser Registration Card to MOTU.
General
This License Agreement shall be governed by the laws of the Commonwealth of Massachusetts and shall inure to the benefit of
MOTU, its successors, administrators, heirs and assigns.
Copyright Notice
Copyright © 2003 by Mark of the Unicorn, Inc. All rights reserved. No part of this publication may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any human or computer language, in any form or by any means
whatsoever, without express written permission of Mark of the Unicorn, Inc., 1280 Massachusetts Avenue, Cambridge, MA,
02138, U.S.A.
Limited Warranty on Hardware
Mark of the Unicorn, Inc. and S&S Research (“MOTU/S&S”) warrant this equipment against defects in materials and
workmanship for a period of NINETY (90) DAYS from the date of original retail purchase.This warranty applies only to hardware
products; MOTU software is licensed and warranted pursuant to separate written statements.
If you discover a defect, first write or call Mark of the Unicorn at [phone] to obtain a Return Merchandise Authorization
Number. No service will be performed on any product returned without prior authorization. MOTU will, at its option, repair or
replace the product at no charge to you, provided you return it during the warranty period, with transportation charges prepaid, to
Mark of the Unicorn, Inc., 1280 Massachusetts Avenue, MA 02138.You must use the product’s original packing material for in
shipment, and insure the shipment for the value of the product. Please include your name, address, telephone number, a
description of the problem, and the original, dated bill of sale with the returned unit and print the Return Merchandise Authorization
Number on the outside of the box below the shipping address.
This warranty does not apply if the equipment has been damaged by accident, abuse, misuse, or misapplication; has been
modified without the written permission of MOTU, or if the product serial number has been removed or defaced.
ALL IMPLIED WARRANTIES, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO NINETY (90) DAYS FROM THE DATE OF THE ORIGINAL
RETAIL PURCHASE OF THIS PRODUCT.
THE WARRANTY AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHERS, ORAL OR
WRITTEN, EXPRESS OR IMPLIED. No MOTU/S&S dealer, agent, or employee is authorized to make any modification,
extension, or addition to this warranty.
MOTU/S&S ARE NOT RESPONSIBLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING
FROM ANY BREACH OF WARRANTY, OR UNDER ANY LEGAL THEORY, INCLUDING LOST PROFITS, DOWNTIME,
GOODWILL, DAMAGE OR REPLACEMENT OF EQUIPMENT AND PROPERTY AND COST OF RECOVERING REPRO-
GRAMMING, OR REPRODUCING ANY PROGRAM OR DATA STORED IN OR USED WITH MOTU/S&S PRODUCTS.
Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so
the above limitation or exclusion may not apply to you.This warranty gives you specific legal rights, and you may have other rights
which vary from state to state.
MIDI Timepiece, MIDI Express, micro express, ClockWorks and Mark of the Unicorn are trademarks of Mark of the Unicorn, Inc.
This equipment has been type 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 instruction manual, may cause harmful interference to radio communica-
tions. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or
television equipment reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by any combination of the following measures:
• Relocate or reorient the receiving antenna
• Increase the separation between the equipment and the receiver
• Plug the equipment into an outlet on a circuit different from that to which the receiver is connected
If necessary, you can consult a dealer or experienced radio/television technician for additional assistance.
PLEASE NOTE: only equipment certified to comply with Class B (computer input/output devices, terminals, printers, etc.) should be
attached to this equipment, and it must have shielded interface cables in order to comply with the Class B FCC limits on RF emissions.
WARNING: changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's
authority to operate the equipment.

Contents
4
Part I: For All Users
7
Packing List and Computer Requirements
9
Installing Your MOTU Interface
17
Installing the MOTU USB MIDI Software
25 Using MIDI Software
Part II: For XT & micro Users
29
ClockWorks For Mac OS X
53
ClockWorks for Mac OS 9
107
Front Panel Presets
113
Synchronization
123
MIDI Machine Control
Part III: Appendices
133
Glossary
139
SMPTE Synchronization Basics
147
Troubleshooting and Customer Support
151
FreeMIDI and OMS
161
Index

5
All Users
Part I
ForAllUsers

7
CHAPTER 1
Packing List and Computer Requirements
THANK YOU FOR CHOOSING MOTU
Thank you for purchasing a MOTU USB MIDI interface.
Please read the important information in this chapter
before using it.
PLEASE REGISTER TODAY
Please send in the registration card included with your
MOTU MIDI interface.As a registered user, you will be
eligible to receive on-line technical support email and
announcements about product enhancements as soon as
they become available. Only registered users receive these
special update notices, so please, complete and mail this
registration card!
Thank you for taking the time to register your new MOTU
product!
PACKING LIST
Your MOTU USB MIDI Interface is shipped with the items
listed below. If any of these items are not present when you
first open the box, please immediately contact your dealer
or MOTU.
■ MOTU USB MIDI Interface
■ Power cord
■ USB cable
■ CD with software drivers
■ Manual
■ Product registration card
MIDI CABLES NOT INCLUDED
To connect each of your MIDI devices to your MOTU
MIDI interface, you need MIDI cables, purchased
separately. Talk to your music dealer to decide how many
you need.
COMPUTER REQUIREMENTS
Your MOTU MIDI interface will run with any USB-
equipped Macintosh running Mac OS 8.6, Mac OS 9, or
Mac OS X (10.2 or later).If you are attempting to use your
MOTU USB interface with an older Macintosh model
equipped with a USB adaptor card, contact MOTU for
compatibility.

PACKING LIST AND COMPUTER REQUIREMENTS
8
MIDI SOFTWARE COMPATIBILITY
Your MOTU USB MIDI Interface will work with the
following kinds of MIDI software:
■ All MOTU software products
■ All Mac OS 9 FreeMIDI-compatible software
■ All Mac OS 9 OMS-compatible software
■ All Mac OS X MIDI software
GETTING STARTED
Follow the directions in the next few chapters of this guide
to successfully install and begin using your new MOTU
USB MIDI interface.
FAMILIARITY WITH YOUR COMPUTER
This manual assumes that your are familiar with using
your computer. If not, please review your computer’s user
guide before proceeding.
VISIT MOTU.COM FOR SOFTWARE UPDATES
Driver updates are posted on our web site as soon as they
become available, so check our web site for the latest
drivers: www.motu.com

9
CHAPTER 2
Installing Your MOTU Interface
OVERVIEW
Connecting the power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connecting the computer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Connecting MIDI gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MIDI connections worksheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SMPTE Time Code sync connections . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connecting a foot switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Connecting an audio click source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Connecting multiple USB interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . 15
CONNECTING THE POWER CORD
Plug the power cord into your MOTU MIDI Interface and
then plug the other end into a grounded power outlet. We
recommend that you leave the interface switched off while
making cable connections during installation.
CONNECTING THE COMPUTER
First,make sure that the interface’s power switch is turned
off. Using the USB cable included with your MOTU MIDI
interface, put the Type A plug into a Type A USB jack on
the computer, the USB computer keyboard, a USB hub, or
any other USB device connected to the computer that has
an available Type A USB jack. The USB cable allows the
Mac to communicate with all MIDI devices connected to
your MOTU MIDI interface. If you have several MOTU
interfaces, see “Connecting multiple USB interfaces” on
page 15.
Figure 2-1: You can plug the Type A connector directly into the computer itself,
a USB keyboard connected to the computer, or any other USB device already
connected to the computer that has an available Type A USB jack.
Figure 2-2: The square Type B plug goes into your MOTU interface.
The flat,“Type A”USB plug
connects to the computer.
You can use any available
Type A jack.

INSTALLING YOUR MOTU INTERFACE
10
CONNECTING MIDI GEAR
Connect each MIDI device’s MIDI IN jack to a MIDI OUT
jack on your MOTU MIDI interface as shown by
Connection A below. Conversely, connect the MIDI OUT
jack on the MIDI device to one of the MIDI IN jacks on
your MOTU MIDI interface as shown by Connection B.
Figure 2-3: Connecting a MIDI device to your MOTU MIDI interface. If you are
connecting a sound module or other device that does not need to transmit
MIDI data,you only need to make connection A shown above.Conversely, if the
device is a MIDI controller such as a drum pad or guitar controller, you only
need to make Connection B.
One-way MIDI connections
MIDI devices that do not receive MIDI data, such as a
dedicated keyboard controller, guitar controller, or drum
pad, only need Connection B shown in Figure 2-3.
Similarly, devices that never send data, such as a sound
module, only need Connection A. However, if you plan to
use editor/librarian software with the sound module,or if
you need to get system exclusive bulk dumps from it, make
both connections. In general, make both connections for
any device that needs to both send and receive MIDI data.
☛
MOTU MIDI interfaces do not require that you use
the same numbered MIDI IN and MIDI OUT for each
device, but experience shows that your system will be
easier to work with if you do.
Connecting additional gear with MIDI THRUs
If you use up all of the MIDI OUTs on your MOTU MIDI
interface, and you still have more gear to connect, run a
MIDI cable from the MIDI THRU of a device already
connected to the interface to the MIDI IN on the
additional device as shown below in Figure 2-4. The two
devices then share the same MIDI OUT port on the MIDI
MOTU
MIDI interface
rear panel
MIDI Device
MIDI
cables
MIDI
IN
MIDI
OUT
MIDI
OUT
MIDI
IN
Connection A
Connection B

INSTALLING YOUR MOTU INTERFACE
11
interface. This means that they share the same set of 16
MIDI channels, so try to do this with devices that receive
on only one MIDI channel (such as effects modules) so
their receive channels don’t conflict with one another.
Figure 2-4: Connecting additional devices with MIDITHRU ports.
MIDI CONNECTIONS WORKSHEET
Here’s a suggestion. If you have more than a few pieces of
gear connected to your MOTU MIDI interface, jot down
which device is connected to each input and output in the
worksheet below. Later on, you’ll enter this information
into your software so you can refer to devices by name.
MIDI IN
MIDI
cable
MIDI Device
MIDI
IN
MIDI
THRU
MIDI
OUT
Additional device
MOTU
MIDI interface
rear panel
MIDI IN MIDI OUT
11
22
33
44
55
66
77
88

INSTALLING YOUR MOTU INTERFACE
12
SMPTE TIME CODE SYNC CONNECTIONS
Your MOTU MIDI interface is both a SMPTE time code
converter and generator .As a converter, it locks (slaves) to
incoming longitudinal SMPTE time code (LTC) and
converts it to MIDI Time Code (MTC) and reshaped LTC.
As a generator, it produces both LTC and MTC time code,
either running under its own internal clock or while slaved
to external time code (or other time base).
When making the SMPTE time code connections
described in the following sections, do not pass the signal
through any type of signal processing equipment. Use
shielded quarter-inch audio cables.
For a complete explanation of synchronization, see
chapter 8,“Synchronization” (page 113).
Connecting a SMPTE time code source
Connect any SMPTE time code source ,such as the SMPTE
timecode track on an analog multitrack tape deck, to the
SMPTE IN port on your MOTU MIDI interface as shown
in Figure 2-5. (For information about recording time code
tracks, see “Striping SMPTE” on page 118.)
Figure 2-5: Connecting a SMPTE time code source.
MOTU MIDI Interface
SMPTE IN
Analog audio tape recorder Video tape recorder
Examples of a SMPTE
time code source
Audio or SMPTE out
Shielded,quarter-inch audio cable

INSTALLING YOUR MOTU INTERFACE
13
Connecting a SMPTE time code destination
Connect the SMPTE OUT port of your MOTU MIDI
interface to the SMPTE time code input of any
destination
device that accepts SMPTE time code as shown in
Figure 2-6. For example, time code can be recorded on an
outside track of a multitrack tape recorder so that
everything can subsequently be synchronized to the
multitrack. Other examples of a SMPTE time code
destination are systems that have the ability to slave to
SMPTE time code, such as stand-alone hard disk
recording systems, digital audio workstations, or
automated mixing consoles.
Figure 2-6: Connecting a SMPTE time code destination.
Analog audio tape recorder Video tape recorder
Examples of a SMPTE
time code destinations
SMPTE or Audio in
Shielded,quarter-inch audio cable
MOTU MIDI Interface
SMPTE OUT

INSTALLING YOUR MOTU INTERFACE
14
CONNECTING A FOOT SWITCH
If you would like to use a foot switch with your MOTU
MIDI interface, connect it as shown below in Figure 2-7.
For more information about how a pedal input can be
used, see “The Pedal tab” on page 48 (or, for Mac OS 9
users, see “Working with a Foot Pedal”on page 97).
Figure 2-7: Connecting a foot switch or foot pedal.
CONNECTING AN AUDIO CLICK SOURCE
If you would like to convert an audio click to MIDI,
connect the audio click source to the Pedal input as using a
shielded, quarter-inch audio cable as shown below in
Figure 2-8. For more information about converting an
audio tempo source (such as a click, bass drum, tape deck
signal, or other audio tempo source) to MIDI, see “Using
an audio click as a tempo source” on page 49 (or, for Mac
OS 9 users see “Converting an audio click to MIDI” on
page 103).
Figure 2-8: Connecting an audio click input.
Examples of
audio click sources
Drum machine
Click track
Shielded
quarter-inch
audio cable

INSTALLING YOUR MOTU INTERFACE
15
CONNECTING MULTIPLE USB INTERFACES
The USB ( Universal Serial Bus ) specification allows you to
connect multiple MOTU interfaces to a single computer.
You can mix and match any combination of MOTU USB
interfaces to suit your needs.
Figure 2-9: An inexpensive, standard USB hub allows you to connect multiple
MOTU USB MIDI interfaces.You can even mix and match different models of
MOTU interfaces, using the combination that best suites your needs for
synchronization, number of MIDI ports,etc.
The USB ( Universal Serial Bus ) specification allows many
USB devices — theoretically up to 127 — to be connected
to a single computer. However, many USB devices,
including all MOTU USB interfaces, reserve USB
bandwidth, so the theoretical and practical limits for
MOTU interfaces are considerably fewer. In theory, the
maximum number of MOTU USB interfaces you can
connect to one computer is just over 30 interfaces.
Practically speaking, regardless of how slow or fast your
USB-equipped computer is, you should be able to connect
upwards of 10 or more MOTU USB MIDI interfaces to the
computer and still enjoy just as much performance from
each one as if it were the only one connected. Just don’t try
to run your USB scanner or digital camera while playing
back and recording MIDI!
For further details about USB, visit www.usb.org.
To connect multiple MOTU interfaces to a computer,
you’ll need an inexpensive device called a
USB Hub
(purchased separately from your computer peripherals
dealer).A USB Hub has multiple Type A ports on it,
usually between 4 and 7 ports, to which you connect
The flat,“Type A”USB plug on the
USB cable from each MOTU interface
connects to the USB hub.
Standard USB Hub
USB
cables

INSTALLING YOUR MOTU INTERFACE
16
multiple USB MIDI interfaces as shown in Figure 2-9.
Connect them to the hub in the standard fashion,as if you
were connecting them directly to the computer. If needed,
you can connect multiple hubs to each other to get enough
USB ports for your multiple MOTU USB interfaces.
WHAT NEXT?
You’re ready to install software. Turn to chapter 3,
“Installing the MOTU USB MIDI Software” (page 17).

17
CHAPTER 3
Installing the MOTU USB MIDI Software
OVERVIEW
Software installation for mac OS X . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Software installation for Mac OS 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Daisy-chaining MIDI devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Where to go next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SOFTWARE INSTALLATION FOR MAC OS X
Your MOTU interface requires several software drivers. It
also includes ClockWorks™, a setup program that gives
you convenient access to your MOTU interface’s
numerous features. Install all of this software as follows:
1 Insert the MOTU USB MIDI installer disc and launch
the installer.
2 Follow the directions that the installer gives you.
What does the installer do?
The installer checks the computer to make sure it satisfies
the minimum system requirements for your MOTU
interface. If so, the installer proceeds with the installation:
drivers are installed and the ClockWorks™ utility is
installed in the Applications folder.
CoreMIDI and Audio MIDI Setup
CoreMIDI is the“under-the-hood” portion of Mac OS X
that handles MIDI services for MIDI hardware and
software. CoreMIDI provides many universal MIDI
system management features, including MIDI
communication between your MOTU USB MIDI
interface and all CoreMIDI compatible software.
Audio MIDI Setup is a utility included with Mac OS X that
allows you to configure your MOTU USB MIDI interface
for use with all CoreMIDI compatible applications.Audio
MIDI Setup provides:
■ A“virtual”studio on your Mac that graphically
represents your MIDI hardware setup and that is shared by
all CoreMIDI-compatible programs
■ A simple, intuitive list of your MIDI devices whenever
you need it in any CoreMIDI-compatible program

INSTALLING THE MOTU USB MIDI SOFTWARE
18
Launching Audio MIDI Setup
1 Make sure your MOTU MIDI interface is connected
and turned on.
2 Launch the Audio MIDI Setup utility.
This can usually be found in /Applications/Utilities. If it
has been moved, just search for
Audio MIDI Setup .
3 Confirm that the MIDI interface is present in the MIDI
Devices
tab of Audio MIDI Setup.
If the interfaces does not appear, or if it is grayed out, check
your cable connections and click
Rescan MIDI .
Figure 3-1: In this example, a MOTU MIDI Express XT interface as it appears in
the MIDI tab of Audio MIDI Setup.
Creating a MIDI configuration
Once your MOTU USB MIDI interface appears in Audio
MIDI Setup, you are ready to add devices, indicate how
they are connected, and identify properties they may have
for particular purposes. This information is shared with
all CoreMIDI compatible applications.
Adding devices in Audio MIDI Setup
To add a device in Audio MIDI Setup:
1 Click Add Device .
Figure 3-2: Adding a MIDI device.

INSTALLING THE MOTU USB MIDI SOFTWARE
19
2 Drag on its input and output arrows to draw
connections to the MIDI interface that match its physical
connection.
Figure 3-3: Connecting the device to the interface.
3 Double-click the device to make settings, such as input
and output channels, that further describe the device.
Figure 3-4: Device settings.
4 Repeat the above steps for each MIDI device connected
to the interface.
5 When you are finished, quit Audio MIDI Setup.

INSTALLING THE MOTU USB MIDI SOFTWARE
20
Your configuration is automatically saved as the default
configuration, and it is shared with all CoreMIDI-
compatible software.You can use the Configuration menu
to create, duplicate or delete alternative configurations.
SOFTWARE INSTALLATION FOR MAC OS 9
Your MOTU interface requires several software drivers. It
also includes ClockWorks™, a setup program that gives
you convenient access to your MOTU interface’s
numerous features. Install all of this software as follows:
1 Temporarily disable all system Extensions, including
virus protection utilities, before you begin.
These utilities can interfere with installation.You can
temporarily disable them by restarting the computer and
holding down the shift key until you see the message
“Extensions off”, which appears right after“Welcome to
Macintosh”. They will turn back on the next time you
restart the computer.
2 Insert the MOTU USB MIDI CD-ROM and run the
installer. The installer is the icon called“Double-click to
install”. Just follow the directions that the installer gives
you.
If the installer asks you about something called“OMS”, it
means that you have OMS installed in your system, and
you need to decide whether to use OMS or FreeMIDI for
MIDI communication with your MOTU interface. See
Appendix D,“FreeMIDI and OMS” page (151).
What does the installer do?
The installer checks the computer to make sure it meets
the minimum system requirements for your MOTU
interface. If so, the installer creates a Folder on the hard
disk containing ClockWorks,the control software for your
MOTU interface. The installer also adds MOTU’s
FreeMIDI system extension to your Macintosh System
Folder. ClockWorks requires FreeMIDI.
Even though the installer does everything for you, it may
be useful for you to know what files are installed and where
they go. The following table provides a summary of the