OPCODE STUDIO 4 User manual

Studio 4
Opcode Systems, Inc.
365 East Middlefield Road
Mountain View, CA 94043
[phone]
http://www.opcode.com
Opcode Part Number: 110-0222-01
Copyright ©1995 Opcode Systems, Inc. All rights reserved. This document may not, in whole or
part, be copied, photocopied, reproduced, translated or converted to any electronic or machine
readable form without prior consent of Opcode Systems, Inc.

LIMITED WARRANTY
Opcode Systems, Inc. warrants the Studio 4
against defects in materials and workmanship
for a period of one (1) year from the date of
original retail purchase.
If you discover a defect, first write or call
Opcode Systems, Inc. at [phone] to
obtain a Return Merchandise Authorization
Number (no service will be performed on any
product returned without prior authorization).
If the product needs to be returned to Opcode,
please attach your name, address, telephone
number, a description of the problem, and a
copy of the dated bill of sale as proof of pur-
chase. Write the Return Merchandise
Authorization (RMA) Number clearly on the
outsideofthepackageandallcorrespondence.
Upon receiving the returned product, Opcode
Systems, Inc. will then, at its option, repair,
replace, or refund the purchase price of the
product.
This warranty applies only to the Studio 4;
Opcode software is warranted separately.
Thiswarrantydoes not applyifthe product has
been damaged by accident, abuse, misuse, or
misapplication, or has been modified without
the written permission of Opcode Systems,
Inc.
All implied warranties, including implied war-
ranties of merchantability and fitness for a
particular purpose, are limited in duration to
one (1) year from the original date of 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.
Opcode Systems, Inc. is not responsible for
special, incidental, or consequential damages
resulting from any breach of warranty, or
under any legal theory, including lost profits,
downtime, good-will, damage to or replace-
ment of equipment and property.
Some states do not allow the exclusion or limi-
tation 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 also have other rights
which vary from state to state.
Except to the extent prohibited by law, all
implied warranties made by Opcode Systems,
Inc. in connection with this manual and soft-
wareare limitedin durationto ninety(90) days
from the date of original purchase, and no war-
ranties, whether express or implied, shall
apply to this product after said period.
Opcode Systems, Inc. makes no warranty or
representation, either express or implied, with
respect to the software described in this man-
ual. This software is sold “as is”. The
purchaser assumes the entire risk as to its
quality and performance. Under no circum-
stances shall Opcode Systems, Inc. be liable
for any loss or damage, direct, consequential,
or incidental, arising out of the use or inability
to use this product.
Some states do not allow limitations on how
long an implied warranty lasts or the exclusion
or limitation of incidental or consequential
damages, so the above limitations or exclu-
sions may not apply to you.

COPYRIGHT
This software and manual are copyrighted
©1995 by Opcode Systems, Inc. with all rights
reserved. The software or manual may not be
copied, in whole or part, without the express
written consent of Opcode Systems, Inc.
except for the original purchaser to make
backup copies. Unauthorized duplication is
prohibited.
This software is protected by both United
States Copyright Law and International Treaty
provisions. Opcode Systems, Inc. grants the
user this license, and use confirms agreement.
The Studio 4 and OMS software may be used
with the Studio 4 by any number of users, and
may be used on more than one computer at a
time. If you have any problems with the soft-
ware or hardware, please consult the user’s
guide first. Consult the dealer from which you
purchased the Studio 4, as they are your best
local source of assistance.
If you still have a problem, call Opcode Sys-
tems, Inc. Technical Support Line at (415) 856-
3331. See the Studio 4 manual for details.
WARNING
NOTE: This equipment has been type tested
and found to comply with the limits for a Class
Bdigital device, pursuantto Part 15of theFCC
Rules. These limits are designed to provide
reasonable protection against harmful interfer-
ence in residential installations. This
equipment uses, and can radiate radio fre-
quency energy, and if not installed and used in
accordance with the instructions, may cause
harmfulinterferencetoradio communications.
However, there is no guarantee that interfer-
ence 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 cor-
rect the interference by one or more of the
following measures:
• Reorient or relocate the receiving antenna
• Move the equipment away from the receiver
• Plug the equipment into an outlet on a cir-
cuit different from that to which the receiver is
powered.
If necessary, the user should consult the
dealer or an experienced radio/television tech-
nician for additional suggestions.
CAUTION: Only equipment certified to comply
with Class B (computer input/output devices,
terminals, printers, etc.) should be attached to
this equipment, and must have shielded inter-
face cables.
Finally, any changes or modifications to the
equipment by the user not expressly approved
by the grantee or manufacturer could void the
users authority to operate such equipment.
ACKNOWLEDGEMENTS
Studio 4 manual written by Gregory A. Simp-
son and Jon Drukman.
OMS, OMS Setup, Studio Patches Editor, and
Studio 4 Driver by Doug Wyatt.

Studio 4 Manual i
TABLE OF CONTENTS
PART 1: Overview and Installation 1
CHAPTER 1: Getting Started 3
Overview of the Studio 4......................................................................3
How to Read this Manual ....................................................................3
The Studio 4 Package ..........................................................................4
Registering Your Studio 4 ...................................................................4
Timecode Basics ..................................................................................5
CHAPTER 2: Panel Descriptions 7
The Studio 4 Front Panel.....................................................................7
The Studio 4 Rear Panel ......................................................................8
About the Interface Cables................................................................10
CHAPTER 3: Hardware Installation 11
Power Connection..............................................................................11
Computer Connections—One Studio 4............................................11
Computer Connections—Networking .............................................13
SMPTE Connections..........................................................................16
MIDI Connections..............................................................................17
CHAPTER 4: Software Installation and Setup 19
Installing OMS and the Studio 4 Software.......................................19
Launching the OMS Setup Application............................................20
Studio 4 Icons in a Studio Setup Document ....................................22
Renaming Studio 4's...........................................................................24
Other Icons in a Studio Setup Document........................................25

Table of Contents
ii Opcode Systems, Inc.
PART 2: Using The Studio 4 27
CHAPTER 5: Introduction 29
Using the Studio 4 with OMS-Compatible Applications.................29
Using the Studio 4 with Non-OMS Applications.............................30
Studio 4<->Macintosh Communication Speed ................................30
The Studio 4 Menu.............................................................................31
CHAPTER 6: Network Routing Window 33
When To Use The Network Routing Window ................................33
Window Overview..............................................................................33
Setting the MIDI Inputs.....................................................................35
Setting the MIDI Outputs..................................................................36
CHAPTER 7: Routing, Channelizing and Muting Window 39
When to use the Routing, Channelizing and Muting Window......39
Window Overview..............................................................................40
MIDI Muting ......................................................................................42
MIDI Channelizing ............................................................................ 44
MIDI Routing......................................................................................45
Timecode Routing..............................................................................48
MIDI Beat Clock Routing.................................................................. 49
The Clear and Help Buttons.............................................................. 52
CHAPTER 8: Saving and Opening Studio 4 State Documents 53
Saving a Studio 4 State Document....................................................53
Opening a Studio 4 State Document................................................54
Establishing a "Do Nothing" State...................................................54
CHAPTER 9: SMPTE Reader Window 57
Using the SMPTE Reader Window..................................................57
Using with Multiple Studio 4’s..........................................................59

Table of Contents
Studio 4 Manual iii
CHAPTER 10: Stripe SMPTE Window 61
Setting and Using Start and Stop Times...........................................61
Setting and Using SMPTE Frame Rates...........................................62
Setting and Using the MIDI Format.................................................62
Guide to Setting SMPTE Levels........................................................63
Jam Sync ..............................................................................................63
Start JamStripe™ Button ....................................................................64
User Bits ..............................................................................................64
Using with Multiple Studio 4’s...........................................................64
SMPTE Tutorial..................................................................................65
PART 3: Appendices 69
APPENDIX A: Troubleshooting 71
Communication Problems..................................................................71
Peripheral Problems...........................................................................71
Sync Problems.....................................................................................71
MIDI Problems ...................................................................................73
Miscellaneous Problems....................................................................74
APPENDIX B: Networking a Studio 4 with a Standard MIDI Interface 75
Computer and MIDI Connections.....................................................75
Software Setup.....................................................................................76
Using the Network..............................................................................76
Networking a Studio 4 and a Studio 3...............................................77
APPENDIX C: Specifications 79
General.................................................................................................79
Connectors...........................................................................................79
Switches...............................................................................................80

Table of Contents
iv Opcode Systems, Inc.

Studio 4 Manual 1
PART 1: Overview and Installation

PART 1: Overview and Installation
2 Opcode Systems, Inc.

Studio 4 Manual 3
CHAPTER 1: Getting Started
OVERVIEW OF THE STUDIO 4
Opcode’s Studio 4 is a multi-port Macin-
tosh MIDI interface with a built-in
SMPTE timecode generator and SMPTE-
to-MIDI timecode converter.
MIDI features of the Studio 4 include:
• Eight independently addressable
MIDI inputs and outputs—this allows
accessto128separateMIDIchannels
with programs that support either
OMS or Mark of the Unicorn’s MIDI
Time Piece™.
• Networking—connect up to three
additional Studio 4’s for 512 separate
MIDI channels. The MIDI Time
Piece and Studio 4 can be part of the
same network.
• Built-in MIDI routing, channelizing
and muting.
• OMS patch compatibility—OMS
patches processed by the Macintosh
may be used with the Studio 4. OMS
patches allow MIDI data to be split,
transposed, modified, and mapped in
many useful ways.
• Standard (1MHz) and Fast communi-
cation speeds.
• A MIDI activity indicator for each
MIDI port.
• Front panel thru switches—these let
you use external peripherals (such as
printers or modems) without chang-
ing cables.
Timecode functions of the Studio 4
include:
• SMPTE Time Code generation (five
frame rates).
• SMPTE-to-MIDI Time Code
conversion.
• SMPTE-to-Direct Time Lock conver-
sion (both DTL and DTLe).
• Jam Syncing (rewrites fresh SMPTE
when locked).
• Flywheeling (remains locked despite
dropouts or other short SMPTE
errors).
The Studio 4 uses the Opcode MIDI
System (OMS) and the Studio 4 OMS
driver software to control all mapping,
channelizing, routing and timecode
functions.
HOW TO READ THIS MANUAL
This manual does not attempt to teach
fullythefundamentalsof MIDI orSMPTE
operation. A brief timecode overview is
presented at the end of this chapter, but if

PART 1: Overview and Installation
4 Opcode Systems, Inc.
you’re new to either of these standards,
youshouldreadmagazinesspecializingin
music technology, or purchase introduc-
tory MIDI and SMPTE books from your
local bookstore or music dealer.
Also, you should be familiar with basic
Macintosh operations. If you’re not,
please read the Macintosh manual before
using the Studio 4.
This manual discusses how to connect,
set up and use the Studio 4—it describes
Studio 4 operations at the time of its print-
ing. However, updates and changes may
occur. Always look for hardware and soft-
ware change information in the Read Me
folder on your master program disk.
The Studio 4 uses the Opcode MIDI
System (OMS) and the Studio 4 OMS
driver software to control all mapping,
channelizing, routing and timecode func-
tions. If you’re already familiar with OMS,
you can read this manual straight
through.
NOTE: If you have never used OMS, read
the first three chapters in this manual, then
read the OMS manual before installing
OMS and reading Chapter 4. Pay particu-
lar attention to the OMS manual's
discussions of installation, defining devices
in your studio and creating a current OMS
Studio Setup document.
This manual is divided into three parts:
• Part 1: Overview and Installation
(Chapters 1-4)—This part discusses
the Studio 4’s front and rear panels
and will help you to integrate the unit
into your studio. It concludes with a
chapter describing software installa-
tion and setup.
• Part 2: Using The Studio 4
(Chapters 5-10)—This part explains
how to set the Studio 4 internal state
and use its SMPTE features.
• Part 3: Appendices
This part includes a troubleshooting
section, details on networking the
Studio 4 with a standard MIDI inter-
face, and the Studio 4 specifications.
THE STUDIO 4 PACKAGE
Your Studio 4 package contains the
Studio 4, an AC adapter, two 12’ serial
cables, 4 rubber feet, rack-mount screws,
OMS and Studio 4 software, an OMS man-
ual, this Studio 4 manual and a
registration card.
REGISTERING YOUR STUDIO 4
Be sure to send Opcode your registration
card. If we don’t receive it, you won’t be
eligible for free technical support and vari-
ous other services and products.
IMPORTANT: Please write down your
Studio 4 serial number here. The serial
number is on the back of the Studio 4.
S/N _______________________________
Purchase Date ______________________
Once we receive your registration card,
you’re entitled to free technical support
and information about upgrades, updates,

CHAPTER 1: Getting Started
Studio 4 Manual 5
and new products. Also, you’ll receive
Opcode’s periodic newsletter, which con-
tains advanced tips, troubleshooting
techniques and more.
Opcode technical support hours (Pacific
Time) are 9:00am to noon and 2:00 to
5:00pm Monday through Friday.
Call [phone] for technical support,
but please try to find the answer in this
manual first.
NOTE: Technical support hours are sub-
ject to change.
TIMECODE BASICS
The operational portions of this manual
assume you’re familiar with SMPTE Time
Code, MIDI Time Code, and Direct Time
Lock. If you’re not, you should read this
section to develop a basic understanding
of synchronization and the various time-
code formats. Consult music technology
magazines or introductory books if you
need more information about any of these
topics.
SMPTE Time Code
SMPTE Time Code is an international
timecode standard created by the Society
of Motion Picture & Television Engi-
neers. It specifies a format for recording
digital timing information onto magnetic
tape; this timing information is divided
into hours, minutes, seconds and frames.
By using SMPTE Time Code (often
referred to simply as “SMPTE”), you can
synchronize the playback of separate
audio decks, video decks and computers.
Using SMPTE requires two separate
actions:
• Generating the SMPTE Time Code
and recording it onto tape (a process
often referred to as “striping”).
• Reading the SMPTE Time Code off
the tape and using it as a master
timing source for synchronizing play-
back of other tape machines and
computers.
There are two types of SMPTE Time
Code: Longitudinal Time Code (LTC),
and Vertical Interval Time Code (VITC).
LTC is recorded on tape tracks that run
linearly across the length of the tape. This
format is recorded on audio tape or on the
audio track of a video tape. VITC is
recorded within the video portion of a
video tape.
Since different video systems run at differ-
ent speeds (or “frame rates”), the SMPTE
formatalsospecifies a number ofdifferent
rates.
The Studio 4 will both generate and read
SMPTE Time Code in the LTC format. If
you have a tape striped with VITC, you’ll
need to use either a VITC-to-LTC con-
verter or a VITC-to-MTC converter such
as Opcode’s Studio AV.
The Studio 4 supports five SMPTE frame
rates. These rates are:
• 24 Frames/second—Film frame rate.
• 25 Frames/second—EBU (Euro-
pean) television frame rate.

PART 1: Overview and Installation
6 Opcode Systems, Inc.
• 29.97 Drop Frame—NTSC (North
American)colortelevisionframerate.
This format runs at 30 Frames/sec-
ond, but has the first two frames
dropped every minute, except at min-
utes 0, 10, 20, 30, 40 and 50.
• 29.97 Frames/second (Non-Drop)—
Usedtosyncto NTSC color television
without dropping frames. SMPTE
time does not match real-time, but
playback pitch is unaffected.
• 30 Frames/second (Non-Drop)—
Original NTSC black and white televi-
sion standard. Often used in audio-
only situations since there are no
dropped frames and the SMPTE time
is equal to real time.
MIDI Time Code and Direct Time
Lock
MIDI computer software cannot read
SMPTE Time Code directly off a tape, so
the code must be converted into a format
that the computer can understand. This
format is called MIDI Time Code (MTC).
The converter then sends MTC (which
retains SMPTE’s hour/minute/second/
frame timing information) to the com-
puter to control the playback of MIDI
sequencers. You use MIDI Time Code to
synchronize your computer sequence to a
master SMPTE timing source.
Direct Time Lock (DTL) and Enhanced
Direct Time Lock (DTLe) are alternate
MIDI synchronization formats developed
by Mark of the Unicorn for their Per-
former sequencer. Very old versions of
Performer require DTL to sync to tape.
Newer versions of Performer use
Enhanced Direct Time Lock (DTLe),
which provides synchronization accuracy
equal to MIDI Time Code.
The Studio 4 will convert SMPTE time-
code (recorded at one of the five
supported frame rates) to either MIDI
Time Code or one of the Direct Time
Lock formats.
Figure 1.1: this will not print - it’s in white color

Studio 4 Manual 7
CHAPTER 2: Panel Descriptions
THE STUDIO 4 FRONT PANEL
Figure 2.1: Studio 4 Front Panel
From left to right, the front panel ports,
LED’s and buttons are as follows:
MIDI Ports 7/15 and 8/16
These two pairs of MIDI ports are on the
front panel to facilitate quick, temporary
connection of synthesizers, controllers or
other MIDI devices. MIDI ports are dis-
cussed in detail in “The Studio 4 Rear
Panel” section later in this chapter.
Front panel MIDI output ports 7/15 and
8/16 are duplicates of MIDI output ports
7/15 and 8/16 found on the rear panel. If
you connect a device to both a front panel
MIDI output and its corresponding rear
panel output, MIDI data will be sent to
both devices.
Front panel MIDI input ports 7/15 and 8/
16 are in addition to the 6 MIDI inputs
found on the rear panel. MIDI input ports
7/15 and 8/16 are not duplicated on the
rear panel.
Ifthe 1-8/9-16switch isin the 1-8 position,
these two ports are numbered 7 and 8. If
the 1-8/9-16 switch is in the 9-16 position,
the ports are numbered 15 and 16.
MIDI In LED’s
These eight red Light Emitting Diodes
(LED’s) indicate MIDI data is arriving at
one or more of the Studio 4’s eight MIDI
input ports.
MIDI Out LED’s
This row of green Light Emitting Diodes
(LED’s) indicates MIDI data is leaving
one or more of the Studio 4’s eight MIDI
output ports.
1MHz/Fast Switch
Use this switch to select a communication
speed. 1MHz is the standard MIDI inter-
face speed required by most MIDI
software. Fast speed increases MIDI
throughput, thereby increasing the
number of simultaneous MIDI channels.
Check your MIDI application manuals to
see if they support Fast mode. Opcode
products that support Fast mode include
Vision, Studio Vision and EZ Vision.
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PART 1: Overview and Installation
8 Opcode Systems, Inc.
NOTE: The Studio 4 driver software must
match the speed selected by the 1MHz/Fast
switch. Configure the Studio 4 driver soft-
ware as discussed in the “Studio 4<-
>Macintosh Communication Speed” sec-
tion in Chapter 5.
1-8/9-16 Switch
Select the 1-8 position (switch in) if the
Studio 4 is the first or only Studio 4 in a
network. This assigns port numbers 1
through 8 to the Studio 4's eight MIDI
ports.
Select the 9-16 position (switch out) if the
Studio 4 is the second in a network. This
assigns port numbers 9 through 16 to the
Studio 4's eight MIDI ports. Network con-
nections are discussed in Chapter 3.
NOTE: If you are using just one Studio 4,
set this switch to the 1-8 position.
Thru Switches (A & B)
These switches provide convenient
access to printers, modems or other
peripherals.
When a Thru switch is in the MIDI posi-
tion, the Studio 4 is in MIDI mode—
transmitting MIDI data between your
Macintosh and various studio devices.
When a Thru switch is in the THRU posi-
tion, data from the Macintosh (as
received on either the “A” or “B” input
ports) is passed through the Studio 4 to
the“AThru” or “B Thru”portsonthe rear
panel. Set a Thru switch to the THRU
position when your Macintosh needs to
communicate with an external peripheral
(such as a printer or modem).
SMPTE/Power Indicator Light
This LED blinks when there is any
SMPTE activity. When no timecode is
sent or received, the LED is lit as a power
indicator.
Power Switch
When pushed in, the power is ON. When
out, the power is OFF. The SMPTE/
Power LED should light when the switch
isinthe ON position ifthepowersupply is
connected to the Studio 4 and plugged in.
THE STUDIO 4 REAR PANEL
Figure 2.2: Studio 4 Rear Panel
From left to right, the rear panel connec-
tors are as follows:
Power Connector
Plug the power supply into this jack. Use
only a 9VDC 1.5A center-positive power
supply.The powersupply isincluded with
the Studio 4.
OUT
MIDI OUT MIDI IN
SMPTE
IN
PORT B PORT A
B
THRU
A
THRU
9VDC 8
16
7
15
6
14
5
13
4
12
3
11
2
10
1
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6
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CHAPTER 2: Panel Descriptions
Studio 4 Manual 9
SMPTE IN Jack
This jack receives SMPTE timecode from
a tape deck or other SMPTE source. The
Studio 4 converts the SMPTE input into
the MIDI format specified by the Stripe
SMPTE window (see Chapter 10).
SMPTE OUT Jack
This jack outputs SMPTE timecode gen-
erated (or regenerated) by the Studio 4.
Thisjackisnormallyconnectedtotheline
input of a tape deck. You may set the
SMPTE output level in the Stripe SMPTE
window (See Chapter 10).
Computer Ports and Thru Ports
The Studio 4 does not implement the tra-
ditional Macintosh MIDI interface
concept of a “Printer port” and a “Modem
port”. Older interfaces have a limit of 32
addressable MIDI channels; 16 on the
Printer port and 16 on the Modem port.
EachStudio 4, however,canaddressupto
128 separate MIDI channels spread
across its two serial inputs. These input
ports are labeled “A” and “B”. The inputs
(with the little Macintosh icons) connect
to the Macintosh using standard 8-pin
mini-DIN cables (supplied by Opcode
with the Studio 4).
You may connect the Studio 4 “A” port to
either the Macintosh Modem port or
Printer port. You may connect the
Studio 4 “B” port to the Modem port, the
Printer port or to another Studio 4 to form
a network. You can also connect two Mac-
intosh computers to one or two Studio 4’s
(See “Computer Connections” in
Chapter 3).
You cannot use the “A” port for network-
ing. As a matter of convention, you may
wish to connect “A” to the Modem port,
leaving the “B” port free for connecting
the Macintosh’s Printer port, another
Macintosh or another Studio 4.
Attach external peripherals (such as a
printer or modem) to the “A THRU” and/
or “B THRU” ports on the Studio 4. You
can use these peripherals without discon-
necting the Studio 4 from the Macintosh.
Simply use the corresponding front panel
Thru switch to route data arriving at one
of the Studio 4 computer ports to its corre-
sponding THRU port (see “Thru
Switches” earlier in this chapter, and
“Computer Connections” in Chapter 3).
MIDI OUT Connectors
Connect these eight ports to the MIDI IN
ports of your MIDI devices. Each port has
dual numbers that correspond to the posi-
tion of the 1-8/9-16 switch on the front
panel.
MIDI output ports 7/15 and 8/16 are
duplicated on the front panel. If you con-
nect devices to both a front panel MIDI
output and its corresponding rear panel
output, MIDI data is sent to both devices.
MIDI IN Connectors
Connect these six ports to the MIDI OUT
ports of your MIDI devices. Each port has
dual numbers that correspond to the posi-

PART 1: Overview and Installation
10 Opcode Systems, Inc.
tion of the 1-8/9-16 switch on the front
panel. Two additional inputs are on the
front panel.
ABOUT THE INTERFACE
CABLES
The Studio 4 comes with standard 8-pin
mini-DIN cables. If you are using cables
other than the ones supplied with the
Studio 4, please ensure that they are 8-pin
mini-DIN.
You should use only high quality shielded
MIDI and audio cables when operating
your Studio 4 or any other professional
audio equipment.

Studio 4 Manual 11
CHAPTER 3: Hardware Installation
Use the rackmount screws (provided) to
mount the Studio 4 in a standard 19”
equipment rack as shown in Figure 3.1.
Figure 3.1: Rack Installation
If you do not wish to rack mount the
Studio 4, you may sit it on a steady sur-
face. Attach the four rubber feet
(provided in this package) to the bottom
of the unit to prevent it from sliding.
POWER CONNECTION
Place the tip of the power supply cord into
the power jack on the far left side of the
rear panel, then plug the power supply
into a standard 120VAC, 60Hz electrical
outlet. Use only a 9VDC, 1.5A, center pos-
itive AC power adaptor with the Studio 4.
Figure 3.2: Power Supply Connection
COMPUTER CONNECTIONS—
ONE STUDIO 4
You may connect the Studio 4 to either
the Macintosh’s Modem port, Printer
port, or to both. Connect the supplied
serialcables betweenthe Studio 4and the
Macintosh as discussed in the following
sections.
Single Port Connection
Single port connections are useful if you
frequently use a Macintosh serial port for
non-MIDI purposes (such as printing)
while running MIDI applications. You can
use the spare Macintosh serial port with-
out using the Studio 4’s front panel MIDI/
THRU switch.
You may connect either the Studio 4’s “A”
port or “B” port to either the Macintosh
Modem or Printer port. The “B” port,
unlike the “A” port, can also be used to
connect an additional MIDI Interface. For
this reason (and as a matter of conven-
tion) you may with to connect “A” to the
Mac’s Modem port, leaving the “B” port
free for later connection to either the
Mac’sPrinterport(discussedinthe“Dual
Port Connection section”) or to another
interface (discussed in the “Computer
Connections—Networking” section).
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OUT
23 645178
14109 111213 1516
23 645178
14109 111213 1516
IN
Studio4
FAST
1Mhz MIDI MIDI
POWER
IN OUT IN OUT
7
15
8
16
A-THRU B-THRU
1-8
9-16
OPCODE
SYSTEMS INC
OMS
OUT
23 645178
14109 111213 1516
To
120VAC,
60Hz outlet
OUT
MIDI OUT MIDI IN
SMPTE
IN
PORT B PORT A
B
THRU
A
THRU
9VDC 8
16
7
15
6
14
5
13
4
12
3
11
2
10
1
9
6
14
5
13
4
12
3
11
2
10
1
9

PART 1: Overview and Installation
12 Opcode Systems, Inc.
Figure 3.3 illustrates a common single
port connection.
Figure 3.3: Single (Modem) Port Connection
Figure 3.3 uses only the Macintosh
Modem port for communicating with the
Studio 4.Oneexternalperipheral(suchas
a printer) can be connected directly to the
Macintosh Printer port. You can connect
an additional external peripheral (such as
a modem) to the “A THRU” jack on the
Studio 4 and switch it in or out from the
front panel.
Dual Port Connection
Use a dual port connection if you need
increased MIDI “throughput” (for exam-
ple, your MIDI data is densely packed
with notes, continuous controls, System
Exclusive messages and MIDI Time
Code). It’s a good idea to always use a
dual port connection when you’re syn-
chronizing MIDI playback with SMPTE
timecode.
You may connect the Studio 4’s “A” port
to either Macintosh serial port. Similarly,
youmayconnect the “B”portto either the
Modem or Printer port.
Figure 3.4 illustrates a common dual port
connection. Connect both Macintosh
serial ports to the Studio 4, and attach any
externalperipheralstotheStudio 4THRU
jacks. You can switch between the
Studio 4 and the external peripherals by
using the corresponding THRU switch on
the front panel.
Figure 3.4: Dual Port Connection
NOTE: In a two cable system, such as
shown in Figure 3.4, use the Network Rout-
ing window to distribute data between ports
(see Chapter 6).
Connecting Two Macintosh
Computers
TwoMacintoshcomputersmayshareone
Studio 4 by connecting one Macintosh to
the Studio 4 “A” port and connecting the
other Macintosh to the Studio 4 “B” port.
Figure 3.5: Two Macs Sharing One Studio 4
YoucanalsoconnecttwoStudio 4’s to two
Macintosh computers as shown in
Figure 3.6. This is an example of a
Studio 4 network. Networking connec-
tions are discussed in the next section.
OUT
SMPTE
IN
PORT B PORT A
B
THRU A THRU
9VDC
MACINTOSH 8-pin mini-DIN cable
(supplied)
Optional cable to peripheral
Optional cable
to peripheral
Studio 4
Optional cables to peripheral
s
OUT
SMPTE
IN
PORT B PORT A
B
THRU A THRU
9VDC
MACINTOSH
8-pin mini-DIN cables
(supplied)
Studio 4
OUT
MIDI OUT MIDI IN
SMPTE
IN
PORT B PORT A
B
THRU
A
THRU
9VDC 8
16
7
15
6
14
5
13
4
12
3
11
2
10
1
9
6
14
5
13
4
12
3
11
2
10
1
9
MACINTOSH MACINTOSH