M-Audio Biport 2x4 User manual

Table of Contents
FCC Class B and CE Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front and Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Stand-Alone Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MIDI Interface Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Functions Shared by Both Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SMPTE Writer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SMPTE Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SMPTE “Write” Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SMPTE “Format” Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
“Mac Thru” Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
BiPort 2x4s Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installation for Stand-Alone Mode . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installation for MIDI Interface Mode . . . . . . . . . . . . . . . . . . . . . . . 13
BiPort to Host Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Selecting a PC Host Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Selecting a Mac Host Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . 16
About the Serial Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Diagnostics Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PC Diagnostics Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mac Diagnostics Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Test Results for Mac or PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
1. Internal Hardware Test . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2. Internal Buffers Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3. Transmit/Receive Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4. Receive Interrupt Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5. SMPTE I/O Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PC Drivers and Driver Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Windows 98 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Windows 98 Driver Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Driver Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Mac Driver/OMS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Mac Driver Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
First Time OMS Configuration Instructions . . . . . . . . . . . . . . . . . . . . . . 26
BiPort 2x4
™ MANUAL
1
Version BiP 071000

Installing with an Existing Studio Setup . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remote Control Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remote Control Windows Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remote Control Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SMPTE Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Remote Control Mac Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Remote Control Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
To Set SMPTE Frame Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
To Set Flywheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
To Set SMPTE Start Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
To Set User Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Configuring Applications to Use BiPort 2x4 . . . . . . . . . . . . . . . . . . . . . . 35
SMPTE/MIDI Time Code Tutorial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
What is SMPTE (Time Code)? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
What is MIDI Time Code (MTC)? . . . . . . . . . . . . . . . . . . . . . . . . . . 37
About Frame Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
What Frame Rate and Settings Should You Use? . . . . . . . . . . . . . 38
SMPTE and MTC User Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SMPTE Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Flywheeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Syncing to SMPTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Recording a SMPTE Stripe (Writing SMPTE) . . . . . . . . . . . . . . . . 40
Syncing to a SMPTE Stripe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Trouble-Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Interface Trouble-Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Syncing Trouble-Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Before Calling Tech Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Lifetime Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

FCC Class B and CE Compliance
WARNING: This equipment has been 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 gener-
ates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions contained in this manual,
may cause harmful interference to radio and television communications.
However, there is no guarantee that interference will not occur in a par-
ticular installation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures: 1) reorient or relocate the receiving
antenna; 2) increase the separation between the equipment and the
receiver; 3) connect the equipment into an outlet on a circuit different
from that of the receiver; 4) consult the dealer or an experienced audio
television technician.
NOTE: Connecting this device to peripheral devices that do not comply
with CLASS B requirements, or using an unshielded peripheral data
cable could also result in harmful interference to radio or television
reception.
The user is cautioned that any changes or modifications not expressly
approved by the party responsible for compliance could void the user’s
authority to operate this equipment.
To ensure that the use of this product does not contribute to interference,
it is necessary to use shielded I/O cables.
This product also complies with European CE requirements.
3

Introduction
Thank you for purchasing the Midiman BiPort 2x4s Serial Port MIDI
Interface. The BiPort 2x4s offers professional MIDI and SMPTE perfor-
mance in an external interface that attaches to any standard PC serial
port, or Macintosh printer or modem port.
The BiPort 2x4s is based on proven Midiman serial port MIDI interface
and SMPTE synchronization technologies. The BiPort 2x4s has the fol-
lowing features:
•Cross-Platform: 9-pin mini DIN connector works with both PC and
Mac computers. The BiPort 2x4s automatically detects connection to
a PC or Mac.
•Operates as a MIDI interface and a stand-alone SMPTE
reader/writer/regenerator.
•Four independent MIDI Outs and two MIDI Ins provide 64 channels
of MIDI output and 32 channels of MIDI input.
•Large high-performance data buffers ensure full MIDI throughput
with no data loss.
•Built-in SMPTE Time Code reader/writer/regenerator supports all
standard time code formats (24, 25, 29.97, 30-drop, 30 non-drop), and
is completely controllable via Front Panel pushbuttons and the
included Remote Control software.
•Supports SMPTE User Bits, set by incoming SMPTE or by Remote
Control software.
•Adjustable SMPTE flywheel and Jam Sync.
•“Mac Thru”switch allows you to activate or bypass the unit so you
can retain your Mac modem or printer connection.
•Windows and MacOS drivers included.
•Drivers are multi-client and support full MIDI bandwidth on all
ports —even when using multiple programs. Multiple BiPort 2x4s
units may operate simultaneously.
•Industry standard MME compatible for the PC, OMS compatible for
Mac.
•Apple Geo-Port compatible.
•Compact size.
4

IMPORTANT NOTE!
Please thoroughly read and follow the installation instruc-
tions before physically installing your BiPort 2x4s. For Macs
and PCs, a factory diskette containing diagnostic software,
drivers and a Remote Control application are included with
your BiPort 2x4s. To install these programs, read this manu-
al and carefully follow the installation procedures.
If you have any questions, comments, or suggestions about BiPort 2x4s
or any MIDIMAN product, we invite you to contact us directly at:
MIDIMAN
45 E. Saint Joseph Street
Arcadia, CA 91006-2861
Technical Assistance: [phone]
E-mail: [email protected]
Fax: [phone]
World Wide Web: www.midiman.net
5

Package Contents
Included in the BiPort 2x4s package should be:
•The BiPort 2x4s interface unit.
•8-pin Mini-DIN to DB-9 Serial cable for PC.
•8-pin Mini-DIN to 8-pin Mini-DIN Serial cable for Mac.
•DC 9 volt, 500 mA power supply (US only).
•This instruction manual.
•A drivers, applications and diagnostics diskette for both Mac & PC.
Front and Back Panel
Front Panel
1. MIDI In-A Connector - For MIDI Input channel A, the first MIDI
input of two.
2. MIDI Out-A Connector - For MIDI Output channel A, the first MIDI
output of four.
3. MIDI In and Out LEDs - Indicate MIDI Input and Output activity on
the 6 MIDI ports.
4. Write button - Starts and stops the SMPTE writer, sets the Write
Offset time.
5. “Locked”and “Writing”LEDs - The “Locked”LED indicates SMPTE
reader/regenerator status; the “Writing”LED indicates SMPTE
writer status.
6. Format button - Manually selects the format of SMPTE Output. Push
repeatedly until the proper format is set.
7. SMPTE Format LEDs - Indicate the current SMPTE output format.
“24”indicates 24 fps (frames per second), “25”indicates 25 fps, “DF”
indicates 30 fps drop-frame, and “30”indicates 30 fps or 29.97 fps in
special cases.
8. Mac Thru button - Selects whether host data is routed to the BiPort
circuitry, or instead by-passed directly to the Mac Thru port.
9. Mac/PC LEDs - Indicate whether the BiPort is connected to a Mac,
PC, or by-passed (Mac Thru).
In-A 24
Write
DF 30
25 Mac
Thru
PC
In-A
Locked
Writing
Format
Out-A
Out-A Out-C
In-B Out-B Out-D
Thru MIDI
Mac
1 2 3 4 5 6 7 8 9
6

Back Panel
10. Power Connector - Accepts power from the 9 Volt DC 500 mA power
supply included with your BiPort 2x4s. If you ever need to replace
this power supply, make sure that it will supply at least 500 mA and
has the center pin positive.
11. Host In - Connects to the serial port of the host computer. For the
PC, it connects to a standard serial (COM) port; for the Mac, it con-
nects to the serial or printer port.
12. Mac Thru - Connects to a modem or printer that would normally be
connected to the serial or printer port of your Macintosh.
13. SMPTE In - Receives SMPTE time code from a tape deck or other
SMPTE source.
14. SMPTE Out - Outputs SMPTE time code to a tape deck or other
SMPTE device.
15. MIDI In-B Connector - For MIDI Input channel B, the second MIDI
input of two.
16. MIDI Outs B, C, and D - For MIDI Output channels B, C, and D (2nd,
3rd and 4th outputs of 4).
Theory of Operation
The BiPort 2x4s may act as a stand-alone SMPTE reader/writer/regener-
ator, or MIDI/SMPTE Interface to a host computer. When first powered
up, the BiPort 2x4s will assume the Stand-Alone mode. In order to enter
MIDI Interface mode, the BiPort 2x4s must be connected to either a Mac
or PC host; the host computer drivers will contact the BiPort 2x4s and
configure it for MIDI Interface mode. When the host is done using the
BiPort 2x4s in Interface Mode, you may command the BiPort 2x4s back
to Stand-Alone mode by exiting all MIDI applications.
Stand-Alone Mode
When first powered up, the BiPort will assume Stand-Alone mode. In
this mode, the BiPort operates in a similar fashion to the Midiman
SyncmanTM and other dedicated sync devices. It is also the mode in
which Mac Thru should be selected if desired. In Stand-Alone mode, the
9VDC
SMPTE
Host
In Mac
Thru Out
In
Out-DOut-COut-BIn-B
10 11 12 13 14 15
16
7

BiPort performs the following functions:
•Acts as a SMPTE writer. The user may manually configure, start and
stop the SMPTE writer from the BiPort’s front panel. The SMPTE sig-
nal appears at the SMPTE Out jack.
•Acts as a SMPTE reader/regenerator. If the BiPort is not writing
SMPTE, whenever a valid SMPTE signal appears at the BiPort’s
SMPTE In, the BiPort will synchronize with and read the incoming
SMPTE signal. It will also automatically regenerate SMPTE to the
SMPTE Out jack.
•Outputs MIDI Time Code (MTC) on MIDI Out-A. Whenever the
BiPort is reading or writing SMPTE it will convert the SMPTE infor-
mation to MTC. The MTC will exit the BiPort at MIDI Out-A.
•Monitors MIDI In-A for SYSEX information from an external source.
An external MIDI device may use SYSEX commands to configure,
start and stop the SMPTE writer.
•Acts as a “thru box”for Mac printer or modem operation.
•All front panel buttons are active in this mode. Only MIDI ports In-A
and Out-A are active.
MIDI Interface Mode
When connected to a PC or Mac host computer, the BiPort may be com-
manded into Interface Mode by that host computer by launching a MIDI
application that utilizes the BiPort driver. When it does, it will indicate
the host type by lighting either the “MAC”or “PC”LED on the BiPort
front panel (these will light in Stand-Alone mode when accessing the
Remote Control software). As an interface, the BiPort 2x4s acts very sim-
ilar to the Midiman Portman 4x4/STM and other MIDI/SMPTE interfaces.
In MIDI Interface mode, the BiPort performs the following functions:
•Acts as a 2-input 4-output MIDI interface. Data is routed between
the host and all MIDI ports simultaneously. Each port is capable of
independent 16-channel MIDI operation.
•Acts as a SMPTE writer. The SMPTE writer may be configured, start-
ed and stopped by either the front panel controls or by Remote
Control software. The SMPTE signal appears at the SMPTE Out jack.
•Acts as a SMPTE reader. Similar to Stand-Alone mode, the BiPort
monitors incoming signals at the SMPTE In jack and locks to it when-
ever valid code is detected.
IMPORTANT: In order to guarantee full MIDI bandwidth on
all ports and accurate SMPTE regeneration, Interface Mode
does not regenerate incoming SMPTE. Only Stand-Alone
Mode regenerates SMPTE.
8

•Outputs MIDI Time Code (MTC) to the host. Whenever the BiPort is
reading or writing SMPTE it will convert the SMPTE information to
MTC. This MTC is transmitted to the host computer via the host seri-
al cable.
•Monitors the host port for SYSEX control information. This is where
commands from the Remote Control software are received.
Functions Shared by Both Modes
Most BiPort functions are available in both MIDI Interface and Stand-
Alone modes. This section describes the operation of each of these
“common”functions.
SMPTE Writer
The SMPTE Writer generates continuous SMPTE and MIDI Time Code.
While writing SMPTE, the “Writing”LED is always illuminated. The
writer may be configured, started and stopped either manually (see
“Write”Button section) or via software. The writer configuration
includes SMPTE output format, start offset, and User Bits. The power-
on defaults for these parameters are 30 fps, 01:00:00:00, and 00 00 00 00,
respectively.
Important: Powering down the BiPort 2x4s will reset all
internally-stored values to their factory defaults.
When the SMPTE Writer is running, the SMPTE reader is disabled. In
fact, the SMPTE writer may override the SMPTE Reader at any time.
While the writer is running, the front panel “Format”button is also dis-
abled. The writer must be stopped before the output format may be
changed.
The Writer is capable of generating SMPTE in five formats: 24fps, 25fps,
29.97fps, 30 drop-frame and 30 non-drop. The 29.97fps format is only
accessible via the Remote Control Software. It is displayed on the front
panel “Format”LEDs as 30fps.
SMPTE Reader
The SMPTE Reader locks to incoming time code, regenerates it to
SMPTE Out (regeneration occurs only in Stand-Alone mode), and con-
verts it to outgoing MIDI Time Code. The SMPTE Reader is capable of
automatically detecting the incoming SMPTE format. When it does, it
9

displays the format to the “Format”LEDs on the BiPort front panel.
Automatic format detection will take between 3 and 31 frames, depend-
ing on the incoming format and the value of the first SMPTE frame
received. When using the BiPort with a sequencer program synced to
MIDI Time Code, at least 3 to 5 seconds of pre-roll are recommended for
proper synchronization.
Once locked, the SMPTE Reader lights the “Locked”LED. Whenever
invalid incoming SMPTE is detected, the “Locked”LED will blink for
approximately 0.25 seconds for each bad frame, or until flywheeling has
completed.
The SMPTE Reader may be configured only via software. The reader
configuration includes the flywheel setting, which has a power-on
default setting of 15 frames. It may be adjusted to jam sync as well as
flywheel - jam sync is equivalent to a flywheel setting of 0 frames (see
the section “SMPTE/MIDI Time Code Tutorial”later in this manual).
Important: Powering down the BiPort 2x4s will reset all
internally-stored values to their factory defaults.
The SMPTE Reader is capable of decoding User Bits from the incoming
SMPTE stream. The most current User Bits are stored to the BiPort inter-
nally and may be used later during SMPTE writing.
SMPTE “Write” Button
The SMPTE “Write”button has two purposes: 1) to manually control the
SMPTE writer, and 2) to stop the SMPTE Reader when it is performing a
“jam sync.”When the “Write”button is pressed and immediately
released, SMPTE time code starts writing at the preset start offset. The
SMPTE Writer will continue to run until the “Write”button is pressed
again. The “Write”button may also be used to change the start offset.
To manually increment the start offset, press and hold the “Write”but-
ton —this will increment the stored start offset by 1 hour every time the
“Write”LED blinks. The blinking occurs approximately once a second.
Release the “Write”button to begin writing at the new offset.
When the SMPTE reader is performing “jam sync,”it will continue to
run indefinitely. However, this may be aborted by pressing the “Write”
button.
10

SMPTE “Format”Button
The “Format”button is used to select the SMPTE output format.
Repeatedly pressing this button will cycle the unit through the four
SMPTE formats displayed on the front panel LEDs. This button is inac-
tive if the BiPort 2x4s is currently reading or writing SMPTE.
“Mac Thru”Button
The “Mac Thru”button selects whether host data is routed to the BiPort
circuitry, or instead by-passed directly to the “Mac Thru”port. To
bypass the BiPort circuitry, set the button to the “Thru”position by
pushing it until it latches in. Setting the BiPort to the “Thru”mode will
make the BiPort transparent to the Mac; the Mac may communicate
directly with a modem or printer that is attached to the “Mac Thru”port
on the back panel of the BiPort.
NOTE: The Mac Thru function does not work with PC com-
puters and peripherals. It is intended for use with Mac
computers only.
To make the BiPort available for communication with a host computer,
set the button to the “MIDI”position by pushing it until it latches out.
When set to this mode, any external device attached to the Mac Thru
port is disabled from communicating with the host computer.
NOTE: In “Thru” Mode, the BiPort can only act as a stand-
alone unit. To indicate that it is “crippled for interface use”
during this mode, the BiPort continuously and alternately
lights the “MAC” and “PC” LEDs on its front panel.
11

Typical Stand Alone Setup - Fig. 1
1
MIDI Hardware Sequencer
MIDI Out MIDI In
Tape In Tape Out
D
A
CB B
A
Mac/PC MIDI Interface with SMPTE
BiPort 2x4sTM
SMPTE
Out In
12

BiPort 2x4s INSTALLATION
Installation for Stand-Alone Mode
A typical stand-alone system set-up (see Fig. 1) might consist of a BiPort
2x4s, a tape deck, and a hardware MIDI sequencer. This set-up is con-
nected as follows:
•The tape recorder Tape (or Sync) Out is connected to the BiPort 2x4s
SMPTE In.
•The tape recorder Tape (or Sync) In is connected to the BiPort 2x4s
SMPTE Out.
•The BiPort 2x4s MIDI Out-A is connected to the MTC (or MIDI) In of
the MIDI sequencer.
In this example, the BiPort 2x4s serves several functions: 1) it synchro-
nizes the MIDI hardware sequencer to the tape recorder by converting
the tape recorder’s SMPTE signal into MIDI Time Code for use by the
sequencer; 2) it acts as a stand-alone SMPTE striper for writing a SMPTE
track to the tape recorder. The BiPort 2x4s’front panel pushbuttons are
used to manually configure and control the BiPort.
Before connecting each piece of equipment, it is a good idea to verify
that each piece is powered down. After all connections are made, apply
power to each device once again.
Installation for MIDI Interface Mode
A typical MIDI interface system set-up (see Fig. 2) consists of a BiPort
2x4s, a host computer, your sequencing software, a tape deck, a master
MIDI keyboard, and additional MIDI sound modules or keyboards.
This set-up is connected as follows:
•The BiPort 2x4s Host In is connected to the serial port of a host com-
puter, using one of the supplied serial cables. See following sections
for more information.
•The BiPort 2x4s Mac Thru button is latched in the “out”position so
that the BiPort 2x4s may communicate with the host computer.
•BiPort 2x4s MIDI In-A is connected to MIDI Out of your MIDI master
keyboard.
•BiPort 2x4s MIDI Out-A is connected to MIDI In of your MIDI master
keyboard.
•The tape deck Tape Out (or Sync Out) is connected to the BiPort 2x4s
13

SMPTE In.
Typical MIDI Interface System
Set-up - Fig. 2
Tape Deck
Tape In
Tape Out
Master Keyboard 2
Master Keyboard
MIDI Out
MIDI In
MIDI Sound Module 2
MIDI Out
MIDI In
Master Keyboard
Master Keyboard
MIDI Sound Module 1
MIDI Out
MIDI In
MIDI Sound Module 2
Modem or Printer (Mac Only)
Mac or PC (Serial Port on PC, Modem or Printer Port on Mac)
1
MIDI In MIDI Out
MIDI In
MIDI In
MIDI Out MIDI In
Mac Thru Host In
Tape In Tape Out
D
A
CBB
A
Mac/PC MIDI Interface with SMPTE
BiPort 2x4sTM
SMPTE
Out In
14

•The tape deck Tape In (or Sync In) is connected to the BiPort 2x4s
SMPTE Out.
•Additional MIDI devices may be directly connected to the BiPort
2x4s MIDI In-B, MIDI Out-B, MIDI Out-C and MIDI Out-D jacks.
In this example, the BiPort 2x4s provides several functions: 1) it acts as a
multi-port MIDI interface between the host computer and the connected
MIDI keyboards and sound modules; 2) it synchronizes the host com-
puter to the tape recorder by converting the tape recorder’s SMPTE sig-
nal into MIDI Time Code for use by the host’s MIDI sequencer applica-
tion; 3) it acts as a SMPTE striper for writing a SMPTE track to the tape
recorder. While connected to the host computer, the BiPort 2x4s may be
controlled by either the front panel pushbuttons or by Remote Control
software running on the host computer. Before connecting each piece of
equipment, it is a good idea to verify that each piece is powered down.
After all connections are made, apply power to each device once again.
NOTE: The BiPort 2x4s may be left attached to a computer
that is turned off. However, the BiPort 2x4s should always
be powered up before the computer. The BiPort-to-Host
serial cable should not be connected or disconnected while
either is powered up.
In order for MIDI Interface mode to properly operate, there are addition-
al steps that must be taken to configure the host computer. Each of these
steps is only required once. After that the host computer will remain
configured for operation. The steps in configuring the host computer for
MIDI Interface mode are:
•Selecting a PC or Mac host serial port and connecting to it.
•Running the included diagnostic software to ensure reliable connec-
tion between the BiPort and the host computer.
•Installing the provided software drivers on the host computer.
•Installing the Remote Control software.
•Configuring the host MIDI application(s) to use the BiPort 2x4s as its
MIDI interface.
Each of these steps is described in its own section that follows.
BiPort to Host Connection
There are two steps to physically connecting the BiPort 2x4s to your host
computer: 1) selecting the host serial port, and 2) connecting the BiPort
to the host with the proper cable.
15

Selecting a PC Host Serial Port
In order to operate as a PC MIDI Interface, the BiPort requires connec-
tion to a PC serial port. PC serial ports are also known as “COM”ports.
The COM port configuration for each computer varies. Most computers
have one or two COM ports, and some are configured to have 4 or more.
Windows knows these COM ports as “COM1”, “COM2”, “COM3”,
“COM4”and so on. Serial ports are usually male (pins sticking out) DB-
type connectors, and can have either 9 or 25 pins. Sometimes a COM
port will not actually be present at the rear of your computer; it may
instead be used internally by a modem or other device.
The COM ports on the back of your computer might be labeled 1 and 2,
or A and B. If not, you should check your computer manual to verify the
actual configuration. If you have a modem in your system, you should
check to see what COM port it is using. A simple way to do this is to go
to the Control Panel, open the Modems icon, and click Properties.
NOTE: Usually odd numbered COM ports share the same
IRQ as COM1, and even numbered COM ports share the
same IRQ as COM2. All COM ports use different I/O
addresses.
Although the IRQ and I/O address (also referred to as Input/Output
range) are fairly standard, you may view these settings within Windows
by going to the Control Panel, opening System, and clicking Device
Manager. Open the Ports list by clicking the plus sign, click the Com
port, click Properties, and then click Resources.
Try to select a COM port for BiPort use that does not use the same IRQ
as some other installed device. Also, select a COM port that is not being
used by a mouse or modem.
Selecting a Mac Host Serial Port
In order to operate as a Mac MIDI Interface, the BiPort requires connec-
tion to one of the Mac serial ports. The BiPort may be connected to
either a modem or printer port of the Mac. Either port may be used -
just be sure the MIDI program you are using is set to use the same port
you have your BiPort 2x4s connected to.
16

About the Serial Cables
The BiPort 2x4s ships with two cables for connecting the BiPort to a host
computer. One cable connects the BiPort to a standard PC serial port
connector (male 9-pin DB-type); the other connects the BiPort to either a
Macintosh modem or printer port. Both cables are standard configura-
tion cables that can be found in most computer supply stores. If your
PC has a 25-pin DB connector serial port instead of a 9-pin version, you
can purchase an adapter that will accommodate the 25-pin connector at
your local computer store.
Diagnostics Software
After the BiPort 2x4s is connected to the host computer, you can ensure
reliable connection between the BiPort and the host computer by run-
ning the included diagnostic software.
PC Diagnostics Application
The included PC diskette contains the BI24DIAG.EXE diagnostic pro-
gram. It is intended for testing the BiPort-to-PC connection.
Note: The PC diagnostic program may be run from either
the “true”DOS prompt, or from a DOS box in Windows. It
will not operate on a Mac computer.
To run the program, insert the MIDIMAN diskette into your computer’s
disk drive. Verify you are accessing the proper disk drive by typing
either “A: <Enter>”or “B: <Enter>”at the DOS prompt. This should
give you either the A:\> prompt, or B:\>, depending on which drive let-
ter represents your 3.5”floppy drive. Once you see this prompt, type
“BI24DIAG”and press the <Enter> key.
Once in the diagnostic program, you can press your computer’s <Enter>
key to toggle through the COM Port setting until it matches your setup.
As you select your COM port, the program will automatically setup the
standard I/O address and IRQ for that COM port. This will work for
nearly all systems. Occasionally custom-configured computers will
require tweaking of the Address and/or IRQ settings. To change these,
use the <up> and <down> cursor keys to select the Address and/or IRQ
Number, then <Enter> to change that parameter’s setting.
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Next, connect a single MIDI cable from BiPort MIDI In-A to MIDI Out-A
(the front two MIDI jacks) of the BiPort 2x4s. This cable will be used to
“loop back”MIDI data - the BiPort will transmit MIDI data from Out-A
and receive/verify it at In-A.
IMPORTANT: When performing this test be sure that BiPort
MIDI In-A and MIDI Out-A are connected properly with a
standard MIDI cable. Otherwise the diagnostics program
will indicate that your unit is failing the test.
Now connect the SMPTE In jack to the SMPTE Out jack using a single
standard male-to-male 1/4”phone cable. This cable will be used to
“loop back”and verify SMPTE data.
Move the cursor down to the “Run Tests”line and press <Enter>. The
program should run through five separate tests. If any of these tests fail,
go back and make sure that you have followed the setup instructions
exactly. Once the first run of tests has passed, toggle the settings on the
“Loopback”line of the diagnostics screen to verify other MIDI input and
1
D
A
CB B
A
Mac/PC MIDI Interface with SMPTE
BiPort 2x4sTM
SMPTE
Out In
MIDI Cable
1
D
A
CB B
A
Mac/PC MIDI Interface with SMPTE
BiPort 2x4sTM
SMPTE
Out In
Standard 1/4”Cable
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output ports. Move the connecting MIDI loopback cable to match the
setting on the diagnostic program screen and re-run the tests to make
sure that all of your BiPort inputs and outputs are working properly.
Mac Diagnostic Application
Included with your BiPort 2x4s is Remote Control and Diagnostic soft-
ware that enables you to configure and control your BiPort 2x4s SMPTE
functions directly from your computer, as well as the diagnostic test for
basic BiPort functionality. The diagnostic test for Macintosh is contained
within the Remote Control software.
To install the BiPort 2x4s Remote Control & Diagnostic application onto
your Macintosh, first insert the disk entitled “BiPort 2x4s Mac Drivers &
Remote Control Software”into your floppy disk drive. When the disk
icon appears, double click on it. Next, locate the file “BiPort Remote”,
click on it and drag it onto your hard drive. Double clicking on the
BiPort Remote application from your hard drive will then open the
BiPort 2x4s Remote Control.
Open the Select Menu, then click Diagnostics. This will bring up the
BiPort diagnostic test for Macintosh computers. Running the test is
almost identical to running the test for the PC, as described on pages 18-
20 in your BiPort manual. The Diagnostic test page will show you the
Device Port that the BiPort is connected to, the “Loopback:”test that will
be performed with a dropdown menu to select other configurations (the
default is Out A to In A), plus a “Passes”list that allows you to select
how many times the diagnostic will run (the default is 1 pass).
To perform this test you must create a MIDI “loopback”by taking one
MIDI cable and plugging one end into Input-A, and the other end into
Output-A (as illustrated on page 18). Also, a single standard male to
male phone cable must be plugged in-between the SMPTE In and Out
on the BiPort’s back panel (also shown on page 18). Once this has been
done, click the “Run Tests”button. This will perform a series of 5 tests
described on pages 19 and 20 of the manual. Refer to these pages and
the troubleshooting guide if your unit fails any of these tests.
To test the functionality of other MIDI ports on the BiPort, pull down the
“Loopback:”menu and select another configuration, e.g. Out B to In B.
You will now need to plug your loopback MIDI cable from Input B to
Output B (in this case). Once again, click Run Tests.
19

Test Results for Mac or PC
Below are brief descriptions of each test phase:
1. Internal Hardware Test
This test verifies the BiPort-to-host connection. If the connection is
working properly, the test will display “PASS”and return the BiPort’s
internal firmware revision number. Write this revision number down in
case you ever need to contact Midiman Tech Support.
If your BiPort fails this test, it could mean a bad BiPort or other hard-
ware failure, but most often it means one of a few very specific things:
•You have selected the incorrect port settings in the diagnostic pro-
gram.
•BiPort power is not properly connected.
•Your serial cable is not compatible or is defective.
•Your computer’s serial port is configured incorrectly, is defective or
disabled. There may be an infrared function available for the serial
port, and it is enabled. You should disable the infrared function via
the BIOS CMOS Setup of your computer’s motherboard
2. Internal Buffers Test
This test verifies the BiPort-to-host connection, as well as the BiPort’s
internal MIDI data buffers. If it fails, it most often is due to one or more
of the following:
•Your serial cable is not compatible or is defective.
•Your computer’s serial port is configured incorrectly, is defective or
disabled. There may be an infrared function available for the serial
port, and it is enabled. You should disable the infrared function via
the BIOS CMOS Setup of your computer’s motherboard
•The BiPort is defective. This is extremely rare as the BiPort units are
tested rigorously at the factory before shipping. If you think this is
the case, please contact MIDIMAN Technical Support.
3. Transmit/Receive Test
This test verifies the BiPort’s ability to transmit and receive MIDI data
on its ports. If it fails, it most often is due to one or more of the follow-
ing:
20