TerraTec PHASE 28 User manual

TERRATEC PRODUCER/PHASE 28
English Manual
Version 1.0, last revised: June 2003

CE Declaration
We:
TerraTec Electronic GmbH, Herrenpfad 38, D-41334 Nettetal, Germany
hereby declare that the product:
PHASE 28,
to which this declaration refers, is in compliance with the following standards or standard-
izing documents:
EN 50013, EN 50022
The following are the stipulated operating conditions and environmental conditions for
said compliance:
residential, business and commercial environments and small-company environments.
This declaration is based on:
Test report(s) of the EMC testing laboratory
The information in this document is subject to change without notice and shall not be deemed as a
warranty by the seller. No warranties, express or implied, are made with regard to the quality,
suitability or accuracy of this document. The manufacturer reserves the right to change the contents
of this document and/or the associated products at any time without the provision of prior notice to
specific persons or organizations. The manufacturer shall not be held liable for damages of any
kind arising from the use, or the inability to use this product or its documentation, even if the
possibility of such damage is known. The information in this document is subject to copyright. All
rights are reserved. No part of this manual may be reproduced or transmitted in any form or for any
purpose without the express written permission of the copyright holders. Product and brand names
contained in this document are used for identification purposes only. All registered trademarks,
product designations or brand names used in this document are the registered property of their
respective owners.
©TerraTec®Electronic GmbH, 1994-2003. All rights reserved (26.06.03).
2 PHASE 28 (English)

Contents
Welcome!........................................................................................................................5
From unpacking the PHASE 28 to installation. ................................................................ 7
Scope of delivery...................................................................................................... 7
The setup - Short and simple for busy professionals. .................................................. 8
Notes for Windows users: ........................................................................................ 9
Notes for Macintosh users:....................................................................................... 9
Installation of the PHASE PCI card - step by step. .................................................... 10
Installing the driver software. ..................................................................................... 11
Driver installation under Windows 98 SE................................................................ 11
Driver installation under Windows Me. ................................................................... 12
Installation under Windows 2000............................................................................ 12
Installation under Windows XP............................................................................... 14
Driver installation for Macintosh OS 10.x (OS X) ....................................................... 15
The connections of the PHASE 28. ............................................................................... 16
Analog outputs........................................................................................................... 18
Analog inputs............................................................................................................. 19
Digital interface (S/PDIF, RAW, AC3)........................................................................ 20
MIDI interface. ........................................................................................................... 21
The drivers (Windows operating system). ..................................................................... 22
The Wave driver..................................................................................................... 22
The ASIO driver. .................................................................................................... 22
The GSIF driver...................................................................................................... 23
The MIDI driver. ..................................................................................................... 23
In detail - special properties of the drivers. ................................................................ 24
32-bit data transfer................................................................................................. 24
DirectSound & WDM. ............................................................................................. 24
WDM sample rate (SR) interpolation...................................................................... 25
WDM kernel streaming........................................................................................... 25
The MAC OS X drivers.................................................................................................. 26
PHASE 28 (English) 3

The ControlPanel...........................................................................................................27
How does the ControlPanel work?..........................................................................28
Analog In. ...............................................................................................................28
Wave Record Select...............................................................................................28
Analog Out. ............................................................................................................28
Master Clock...........................................................................................................29
Digital Out...............................................................................................................29
Channel Status. ......................................................................................................29
Master Out..............................................................................................................30
ASIO (Windows).....................................................................................................30
The ASIO buffer size (Windows) ............................................................................31
Colors. ....................................................................................................................31
Cascading and internal synchronization.........................................................................32
The pin rows...........................................................................................................32
The PHASE ControlPanel ......................................................................................33
Appendix A - Technical Data .........................................................................................34
4 PHASE 28 (English)

Safety note.
Be sure that all analog devices are turned off before plugging
them in. This will protect you from any possible - even weak -
electrical shocks, and will protect your speakers and your hearing
from sudden, loud pops. For digital devices, be sure to at least
lower the volume on your playback equipment.
Welcome!
We are pleased that you have chosen a TerraTec Producer Audio Interface for your
musical endeavors and would like to congratulate you on your decision. With the PHASE
28 system, you've purchased a sophisticated product representing the state of the art of
studio technology - and we're convinced this innovative development will prove extremely
useful to you in the coming years and, above all, provide you with a great deal of enter-
tainment.
We hope that this brochure is helpful to you while using the product. It is designed to
illustrate technical relationships based on practical examples from the studio environment.
However, it is designed not only for beginners, but also for those more advanced in this
complex matter: Ambitious professionals, too, will surely learn something new here and
there.
We hope you enjoy reading about the PHASE 28 system, and find great satisfaction in
using it.
Sincerely,Your TerraTec Producer Team
PHASE 28 (English) 5

The widest variety of connecting equipment.The PHASE 28 system features a range
of professional connection options, which predestine it to become the audiophile hub of
your home or project studio.
With two balanced inputs and eight outputs, a low-latency MIDI interface and multipur-
pose digital I/Os, the PHASE 28 audio system offers breakout cables with sufficient
connections in all directions. The finest convertor elements and a well-thought-out
motherboard design allow crystal-clear recording and the reproduction of high-resolution
5.1/7.1 Surround productions.
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For everything you need to know about connections, see Üpage16.
The nerve center - The software.As you know, a professional AudioSystem is not a
sound card for wild-eyed gamers, but instead it is the heart of your day-to-day computer-
ized studio work. And despite the extensive connection options of the PHASE 28 system,
the PHASE software always provides you with a clear overview and– depending on the
complexity of your switching needs– remains transparent and intuitive.
For everything you need to know about the PHASE ControlPanel, see Üpage 27.
The drivers provided for the PHASE 28 series, too, leave nothing to be desired. A
highly developed software architecture guarantees problem-free use with all modern
Windows and Apple operating systems.
The ASIO drivers– thoroughly proven throughout years of application and often used as a
reference– allow the lowest possible latency between the software-based sound genera-
tion and audio output.
For information on the topic of drivers, see the section beginning on Üpage 22.
6 PHASE 28 (English)

From unpacking the PHASE 28 system to installation.
Before installing the PCI card into your computer and running cables to the PHASE 28
PCI card, take note of any special points pertaining to the configuration of your computer.
Also refer to the manual of your computer and other studio peripheral devices for their
settings.
Please observe the following instructions to ensure a trouble-free installation. If you still
have difficulties, please review carefully the relevant chapter in this manual.
Our Service Hotline is also available to help. The telephone number, as well as the
current hotline hours, can be found in the Support area of the TerraTec website
www.terratec.com.
Scope of delivery.
Start by making sure that the contents of the package are complete.
The scope of delivery of the PHASE 28 system includes at least the following:
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1 PCI card
1 cable whip with numerous connection jacks
1 thin sync cord for cascading via “EWS Connect”
1 driver CD, including software and music!
1 customer service card
1 registration card with the serial number
This manual
Besonic Premium Account
Please return the enclosed registration card to us at the earliest possible opportunity, or
register online at www.terratec.net/register.htm. This is important for support
and hotline services.
PHASE 28 (English) 7

The setup - Short and simple for busy professionals.
■Before installing the PCI card, please check the Sync-In and Sync-Out connections
(PHASE/EWS Connect) on the PCI card. If you do not have any other TerraTec PCI
systems with EWS Connect connections in your computer, the following applies:
Sync-In (CN1) – the jumper must be positioned at 1-2;
Sync Out (CN2) – this connection remains free.
Figure: The EWS Connect connection
If you have other TerraTec PCI systems with EWS Connect connectors in your com-
puter, and want to synchronize them, please first read the chapter entitled “Cascading
and internal synchronization.” (Üpage 32)
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The PHASE 28 audio interface is a PCI card with bus-mastering support. Please
choose a slot that is as far away from the graphics card(s) and SCSI/RAID controllers
as possible - usually as close to the “bottom” as possible in most installations. Also,
remember that the heavy cable whip hangs down, and that there are cables con-
nected to it.
You will need one (1) IRQ. If you want to install multiple audio systems of the Ter-
raTec family, you can do so with no problem– all PCI cards use the so-called IRQ
sharing mode (for details on cascading, see Üpage 32).
The driver installation in Windows (98SE to XP) follows the standardized defaults set
by the operating system manufacturer. You can find the drivers on the accompanying
CD-ROM or on the Internet at www.terratec.com in the SUPPORT area.
8 PHASE 28 (English)

Notes for Windows users:
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The drivers have not been certified by Microsoft. You will receive a warning to this
effect in Windows 2000 and XP, which you can safely ignore. You can continue the
installation without concern.
After installing the drivers, open the Device Manager and check for yellow exclamation
marks. If you find any, you can usually solve the problem by repeating the installation
according to the instructions. Also refer to the FAQs (frequently asked questions)
provided on the product CD for other suggested solutions.
After the drivers have been installed, install the software. You can start the installation
using the autostart function of the CD, for example. The PHASE 28 ControlPanel has
to be installed in all circumstances. Full functionality is not provided using the stan-
dard Windows Mixer.
The WDM audio drivers can be selected in the applications as usual. ASIO drivers are
available in compatible programs; WDM kernel streaming is “not visible” (in other
words, it is always available for applications needing it and cannot be selected manu-
ally). The respective buffer sizes are configured in the PHASE ControlPanel (not the
Windows ControlPanel).
Notes for Macintosh users:
The PHASE 28 system is shipped with driver support for MAC OS 10 (OS X). In the
OS10 version, we recommend the Apple operating system update called “Jaguar”
(current version 10.2.6). A version update, which can be obtained for an extra charge,
contains some improvements specially geared towards audio applications.
The audio and MIDI connection using OS10(X) is built exclusively on the OS10 core
audio/MIDI concept.
PHASE 28 (English) 9

Installation of the PHASE PCI card - step by step.
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Switch off your computer and all connected peripheral devices such as your printer
and monitor. Leave the power supply cable connected for the time being, so that your
computer is still grounded.
Touch the metal chassis at the rear of the computer to ground yourself and discharge
static electricity from yourself. Now unplug the power supply cable.
Remove the housing cover from your computer or open it.
Find a free PCI slot, remove the screw securing the metal cover over the slot and
remove the cover itself. Should it be necessary to break a cover out of the case, do so
with care to avoid injury.
To ensure the optimal function of your system, look for an expansion slot that is not
immediately next to an already-installed card. Some cards, such as video or
SCSI/RAID adapters, can send out signals which can interfere with the sound card.
We also recommend a slot as close to the bottom of the computer as possible, as you
can or must connect several cables directly to the card itself. Due to certain physical
properties of our planet, it is very likely that these cables will dangle downward.
Carefully remove the PCI card from its packaging. To do so, place one hand on a
metal part of the computer case while picking the card up by the edges.
This will ensure that your body is completely discharged (no joke) of static electricity
via your computer, so that no damage is done to the card. Please do not touch the
components on the board.
Align the audio card so that the strip with the gold connector pins is located exactly
over the PCI slot.
Insert the card into the slot. You might have to press the card firmly into the slot to
make good contact. Take care to ensure that the contacts are exactly in line. If they
are not, you could do damage to the audio card or your computer's motherboard.
Fasten the card in place using the screw you removed earlier from the slot cover (if
there was one).
After switching on and booting up the system, the driver installation follows
(see Üpage 11).
10 PHASE 28 (English)

Installing the driver software.
The PHASE 28 system is shipped with drivers for the Windows 98SE, ME, Windows
2000, XP and MAC OS10 (X) operating systems. Windows 95/98 and Windows NT 4 are
not supported. You should therefore determine which operating system you are using
before installing the card. For information on your operating system and its version
number, please check the “System” dialog in the Windows Control Panel.
In the following driver installation descriptions, <CD> stands for the drive letter of the CD-
ROM drive containing the PHASE driver CD.
Driver installation under Windows 98 SE.
1. Boot your computer after installing the PHASE 28 PCI card.
2. During the boot-up process, the Windows hardware wizard will identify the new
hardware as a “PCI Multimedia Audio Device”. Confirm by clicking “Next”.
3. The hardware wizard will ask you how you would like to continue. Select the “Search
for the best driver for my device (Recommended)” item and confirm with “Next”.
4. Check the “Specify a location” box and enter the path to the driver on the CD.
<CD>:\PHASE 28\Driver\Windows\. Alternatively, you can also select the path to
the best driver of your PHASE 28 PCI system using the mouse by clicking “Browse...”.
Confirm by clicking “Next”.
5. In the last window, the hardware wizard will report that the driver software has been
installed successfully. Close the wizard by clicking “Finish”.
If, contrary to all expectations, a window prompts you to perform an action that you are
not sure about it, pressing the Enter key is generally the safe way to go.
If Windows requests a second driver file, please refer to the aforementioned directory on
the PHASE CD-ROM. It is also possible (e.g. if this is the first sound card installation in
your system) that some additional Windows extensions have to be installed. Please have
your Windows CD ready for this purpose.
After successful driver installation, the PHASE 28 ControlPanel can be installed easily
using the autorun option(<CD>:\autorun.exe).
Follow the instructions on the screen to install the various bundled software programs.
The ControlPanel application is also easy to remove from your system. To do so, open
the “Add/Remove Programs” dialog from the Control Panel. Search for the program to be
deleted, select it and click “Change/Remove”.
After a successful driver installation, you should verify that your Windows 98SE system is
functioning properly. The Device Manager presents an overview of hardware components
installed and recognized on your computer. The Device Manager can be found in the
Control Panel under “System”.
PHASE 28 (English) 11

Driver installation under Windows Me.
1. Boot your computer after installing the PHASE 28 PCI card.
2. During the boot, the Windows hardware wizard will identify the new hardware as a
“PCI Multimedia Audio Device”. Select here “Specify the location of the driver (Ad-
vanced)” and confirm with “Next”.
3. Now activate the “Specify a location:” checkbox and enter the path <CD>:\PHASE
28\Driver\Windows\. Confirm by clicking “Next”. Alternatively, you can change to
the respective directory by clicking on “Browse...”.
4. The hardware wizard will now search for the AudioSystem PHASE 28 driver and will
display the location of the driver. Confirm by clicking “Next”.
5. In the final window, the hardware wizard will report that the driver software has been
installed successfully. Close the wizard by clicking “Finish”.
After successful driver installation, the PHASE 28 ControlPanel can be installed easily
using the autorun option (<CD>:\autorun.exe).
Follow the instructions on the screen to install the various bundled software programs.
The ControlPanel application can also easily be removed from your system. To do so,
access “Add/Remove Programs” from the Control Panel and search for the program to be
deleted, select it and click “Change/Remove”.
After a successful driver installation, you should verify the correct condition of your
Windows ME system. The Device Manager presents an overview of installed and
recognized hardware components of your computer. The Device Manager can be found
on the Control Panel under “System” > “Hardware”. Then click the “Device Manager”
button.
Installation under Windows 2000.
1. Boot your computer after installing the PHASE 28 PCI card.
2. During the boot, the Windows hardware wizard will identify the new hardware as a
“Multimedia Audio Controller”. Confirm by clicking “Next”.
3. Mark the “Search for a suitable driver for my device (recommended)” checkbox and
insert the PHASE CD if you have not done so already. Click “Next”.
4. The hardware wizard will now inform you that it will search for drivers for a “Multimedia
Audio Controller”. Activate the checkbox “CD-ROM drives” and confirm with “Next”.
5. The hardware wizard will now indicate that it has found a suitable driver for the
“Multimedia Audio Controller” on the CD-ROM (<CD>:\driver\). Click “Next” to
start the installation.
6. The following dialog box may appear at this point or later in the installation:
12 PHASE 28 (English)

This is no cause for alarm. Click “Yes” to continue. The installation will now be executed.
If contrary to all expectations an additional request should appear for you to perform
some action and you are not sure about it, then pressing the Enter key is generally a safe
action.
If Windows requests a second driver file, please refer to the aforementioned directory on
the PHASE CD-ROM. It is also possible (e.g. if this is the first sound card installation in
your system) that some additional Windows extensions have to be installed. Please have
your Windows CD ready for this purpose.
After successful driver installation, the PHASE 28 ControlPanel can be installed easily
using the autorun option (<CD>:\autorun.exe).
Follow the instructions on the screen to install the various bundled software programs.
The ControlPanel application can also easily be removed from your system. To do so,
access “Add/Remove Programs” from the Control Panel and search for the program to be
deleted, select it and click “Change/Remove”.
After a successful driver installation, you should verify the correct condition of your
Windows 2000 system. The Device Manager presents an overview of installed and
recognized hardware components of your computer. The Device Manager can be found
on the Control Panel under “System” > “Hardware”. Then click the “Device Manager”
button.
PHASE 28 (English) 13

Installation under Windows XP.
1. Boot your computer after installing the PHASE 28 PCI card.
2. During the boot, the Windows hardware wizard will identify the new hardware as a
“Multimedia Audio Controller”. If you have not done so already, insert the PHASE CD-
ROM now. Next, mark the “Install the software automatically [Recommended]” check-
box and click “Next”.
3. The hardware wizard will now inform you that it will search for drivers for a “Multimedia
Audio Controller”.
4. The following dialog box may appear at this point or later in the installation:
This is no cause for alarm. Click “Yes” to continue. The installation will now be exe-
cuted.
5. In the final window, the hardware wizard will report that the driver software has been
installed successfully. Close the wizard by clicking “Finish”.
If contrary to all expectations an additional request should appear for you to perform
some action and you are not sure about it, then pressing the Enter key is generally a safe
action.
If Windows requests a second driver file, please refer to the aforementioned directory on
the PHASE CD-ROM. It is also possible (e.g. if this is the first sound card installation in
your system) that some additional Windows extensions have to be installed. Please have
your Windows CD ready for this purpose.
After successful driver installation, the PHASE 28 ControlPanel can be installed easily
using the autorun option (<CD>:\autorun.exe).
Follow the instructions on the screen to install the various bundled software programs.
The ControlPanel application can also easily be removed from your system. Top do so,
14 PHASE 28 (English)

access “Add/Remove Programs” from the Control Panel and search for the program to be
deleted, select it and click “Change/Remove”.
After a successful driver installation, you should verify the correct condition of your
Windows XP system. The Device Manager presents an overview of installed and
recognized hardware components of your computer. The Device Manager can be found
in the Control Panel under “System” > “Hardware”. Then click the “Device Manager”
button.
Driver installation for Macintosh OS 10.x (OS X)
In the OS10 version, we recommend the Apple operating system update called “Jaguar”
(current version 10.2.6). This update, which can be obtained for an extra charge, contains
some improvements specially geared towards audio applications. The system require-
ments are OS10.1 or higher. Furthermore, in order to install the drivers, you must have
administrator rights on the system.
To install the PHASE 28 MAC OS X –driver and the ControlPanel application, select the
program PHASE 28 OS10 Installer.pkg from the directory <CD>:\PHASE
28\Driver\MAC\ of the PHASE 28 product CD. For identification, enter your name and
your OS X password. During installation, you will be asked for the target drive; select the
desired target drive. Follow the instructions of the installer and complete the installation by
rebooting your system.
After restarting the system, you can select the PHASE 28 ControlPanel from the directory
Macintosh HD -> Programs.
PHASE 28 (English) 15

The connections of the PHASE 28 system.
The PHASE 28 audio interface offers you numerous connections for connecting profes-
sional studio peripherals. Following is a detailed overview of its technical and electrical
characteristics:
The PHASE 28 PCI system
16 PHASE 28 (English)

1. Connection for the PHASE 28 cable adapter. Please ensure that the connector strip
is firmly screwed onto the PCI system, as the weight of the cable can otherwise cause
it to come unplugged.
2. Gain controller for analog input 1. Here, the present signal can be optimally
adjusted to the converter level. Any clipping is indicated by the corresponding LED (3).
3. Clipping LED for analog input 1. As soon as the signal reaches the clipping level (-
1dB @ 2.1 Volt RMS, 1kHz), the LED is lit. In this case, push back the gain with the
appropriate gain controller (2) until the LED stops blinking. If the setting range is not
sufficient to go below the clipping range, reduce the output level on your external
equipment (e.g. mixer).
4. Gain controller for analog input 2. Here, the present signal can be optimally
adjusted to the converter level. Any clipping is indicated by the respective LED (4).
5. Clipping LED for analog input 2. As soon as the signal reaches the clipping level (-
1dB @ 2.1 Volt RMS, 1kHz), the LED is lit. In this case, decrease the amplification
using the appropriate gain controller (4) just to the point where the LED stops blinking.
If the setting range is not sufficient to go below the clipping range, reduce the output
level on your external equipment (e.g. mixer).
6. EWS®Connect Sync-IN connection. For the internal synchronization of up to 4
EWS/PHASE PCI cards (5 contacts, the jumper must remain on the master card). For
more information, please read Chapter “Cascading and internal synchronization.”
starting on Üpage 32.
7. EWS®Connect Sync-OUT connection. For the synchronization of up to 4
EWS/PHASE PCI systems (2 contacts).
PHASE 28 (English) 17

Analog outputs.
The analog outputs of the PHASE 28 system operate with musi-
cian-friendly line levels of +4dBu (plus headroom, typically 2.1
volts RMS). Here, you can connect a mixing board, active speak-
ers, or amplifiers.
The PHASE 28 system is equipped with 8 analog outputs, which you can address
independently of one other. The connections are in 6.3mm cinch format and offer a
balanced signal path to minimize interference.
In the driver as well as the PHASE ControlPanel, the outputs are always treated as pairs
(thus, for example 1/2, 3/4, 5/6, 7/8), when the application in use supports pairs. Of
course, you can also control the channels separately (in mono). However, you will usually
control the volumes from within the audio software application you use.
The output level of all channels is set to approximately +4dBu and also offers sufficient
headroom if required in your productions (including headroom, typically 2.1 volts RMS).
Practical tip: Make full use of the 24-bit support of up-to-date
software applications and connected digital peripherals- even if
you are planning to “just” release your production on CD. The
additional sound quality is audibly worthwhile, both in the sum of
the signals and, above all, during digital post-production.
18 PHASE 28 (English)

Analog inputs.
The analog inputs of the PHASE 28 system are equipped with
high-quality preamplifiers, with which you can manually control the
gain of the converter. Here, you can connect the AUX or TAPE
outputs of a mixing board, instruments with line level output, a
tape recorder or similar peripheral gear.
The PHASE 28 system offers you two high-quality analog input jacks, which can be
addressed separately. The connections are in 6.3 mm cinch format and offer a balanced
signal path to minimize interference. Of course, non-balanced mono cinch cords can also
be connected; the unused phase is then automatically connected to the analog signal.
On the slot plate of the PCI card, there are two control sliders, which you can use to
adjust the input stages manually and very precisely to your needs. To do so, please use a
small flathead screwdriver. However, never insert it into your power supply's fan! ;-)
Beginning at approximately -1 dB (0 dB corresponds to 2.1 V RMS @ 1kHz), the red
LEDs signal the threat of clipping at the inputs. The exact level converted by the 24-bit
A/D convertors can be viewed using the PHASE ControlPanel or common audio software.
If, despite being manually turned to the maximum level, a connected device supplies too
low of a signal, you can use the controllers in the PHASE ControlPanel to additionally
increase the level in 0.5 dB increments. However, this amplifier stage does not provide
optimal signal quality.
In the drivers as well as in the PHASE ControlPanel, the inputs are viewed as a stereo
pair. As a rule, you can also combine the two channels for mono use in common audio
editors.
Practical tip: While recording, try to achieve as high a recording
level as possible to benefit best from the wide dynamic range of
the 24-bit converter. As a rule of thumb for good recordings, al-
ways take the following into account: a clean “take” is much more
valuable than the best plug-in for later sound correction.
PHASE 28 (English) 19

Digital interface (S/PDIF, RAW, AC3).
Devices that can process the S/PDIF protocol or Dolby AC3/DTS
signals can be connected to the coaxial digital interface (cinch
plugs, RCA). This includes, for example, DAT recorders and many
HiFi components, or even other computers that you want to con-
nect to the audio network (VST System Link).
If you want to transfer music digitally from the computer to other devices, or record audio
data using the computer, you can do so using the digital interface of the PHASE 28
system. One coaxial (RCA/Cinch) jack is available for both recording and playback.
The cables for digital connections are always connected “crosswise”, meaning OUT to IN
and vice-versa. Pulses are transmitted together with the audio data when the S/PDIF
protocol is used. This is known as the sample rate. The interface of the PHASE 28
system can receive rates up to 96,000 Hz and send rates up to 192,000 Hz. You should
keep this difference in mind if you plan to exchange digital data, for example using a
ProTools system or a VST System Link.
The correct driver for recording digital sources is called “PHASE 28 WAVE”.
You can find detailed information on the digital interface settings in the PHASE Control-
Panel beginning on Üpage 27.
Practical tip: If possible, use specially shielded RCA cables for
transferring audio data, at least if it is important to have an abso-
lutely clean, jitter-free signal path (for example, when mastering).
Advertisement ;-) TerraTec's Vice Versa is a compact S/PDIF
converter, which allows audio devices to be connected with optical
TOSLink connections to electrical cinch connections– and vice-
versa. This clever switching technique allows you to select
whether to use Vice Versa as a bi-directional converter or as a
signal repeater. For more information, go to www.terratec.com.
20 PHASE 28 (English)