PostPro Manual Rebuild2

Operating Manual
Penteo® PostPro™ Stereo-to-Surround Audio Processor
Initial Software Release
June, 2010

BNC connectors on two-foot 75 ohm coaxial
cabling, optional
connectors on six-foot shielded twisted pair
PostPro-A 25-pin male D-sub to male and female XLR
PostPro-D six-foot D-sub to XLR cables set, optional
Model Description
box.
Power Requirements 100-240V, 50-60Hz, 2.5A
Cables:
cabling plus 15-pin high-density male D-sub to
(1) male and (1) female XLR on six-foot
shielded twisted pair cabling and (4) female
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
Penteo PostPro Stand-alone audio processor in a desktop

Please read this Manual
You are advised to review this Manual, especially the installation section, before
unpacking the unit.
Re-Packing the unit
If you need to repack the unit for shipping:
1. Wrap the unit in its original plastic bag to avoid abrading the paint.
2. Seal the inner and outer cartons with tape.
If you are returning the unit permanently (for credit), be sure to enclose any audio
and power cables necessary for the unit.
You may be charged for any missing items.
If you are returning a unit for repair, do not enclose any of the above items.
Problems?
If you have problems with installation or operation:
1. Check everything you have done so far against the instructions in this
Manual.
2. Check the website at http://www.penteosurround.com
3. Call Penteo Customer Service for advice during California business hours
at (510) 655-5583.

Penteo is a registered trademark.
Penteo acknowledges any incidental trademarks referenced in this document are
property of their respective owners.
PenteoSurround Incorporated
PO Box 11295
Piedmont, CA 94611
(510) 655-5583
www.penteosurround.com
© 2010
This unit was assembled in California.

About Penteo Processing
Penteo® is designed to be the ideal drop-in solution for optimally
converting stereo audio media of all kinds – music, motion
picture, and broadcast – into the most entertaining 5.1 surround
experience possible.
Penteo operates by performing a real-time digital forensic analysis
of the stereo mix, detecting and enumerating the left-to-right
stereo positioning relationships of all the sounds as they were
distributed, left to right..
The relationships are directly translated into their equivalent
locations in a 5.1 surround soundfield.
Penteo adds no effects of its own.
Resulting stereo downmixes have absolutely no artifacts.
Penteo downmixes to back to stereo,
just as stereo downmixes back to mono.
Penteo PostPro™ Desktop Operating' Manual Page 1

About the platform
The Penteo processor has been built using a miniaturized full
computer system motherboard and microprocessors.
The Penteo processor is an embedded appliance, with a form
factor that is completely re-configurable through downloadable
software; a completely reusable hardware platform which can be
upgraded by a simple download.
Because the unit is built on a conventional motherboard platform,
there are the usual PS2-type keyboard and mouse inputs, an
RS232 serial port, a VGA output, and several USB2 connectors.
While you are free to connect a VGA monitor, there is little to see,
with two text windows communicating with each other. The
embedded software is hardware encrypted, and will not function
if downloaded.

Processing Latency
Because Penteo continuously analyzes the left-vs.-right channel
relationships, Penteo must store a small snippet of sound
momentarily to evaluate the waveform characteristics before
feeding out the sliced channels.
Accordingly, there is a nominal processing delay of 214
milliseconds.
(No, this can't be eliminated by faster processors!)
For live television use, a video delay of 7 NTSC or 6 PAL frames
must be employed in the video path to retain lip-sync.
For post-production workstation use, simply delete 214
milliseconds of silence from the head of the processed audio to
restore lip-sync.

Unit Installation
Installation consists of:
• unpacking and inspecting your Penteo processor.
• locating an appropriate desktop space.
• connecting inputs, outputs and power.
1. Unpack and inspect.
If you note obvious physical damage on receipt, contact the
carrier immediately to make a damage claim.
Packed with the Penteo processor are a North American power
cord and one of the following cable sets, if ordered:
PostPro-D (digital out):
1 Six-foot HD-DB26 to XLR cable set, optional.
PostPro A (analog out):
• DB25 to male and female XLR connectors on six
foot shielded twisted pair cabling
• DB15 to digital audio and sync connectors.
If you should ever have to ship the Penteo processor (e.g., for servicing), it
is best to ship it in the original carton with its packing materials because
both the carton and packing material have been selected to protect the
unit in shipping.

Unit Installation
2. Locate an appropriate mounting space.
Because of its quiet fans, the Penteo PostPro Desktop processor
can be mounted in a control room mix position.
3. Connect an appropriate power cord.
The power supply supports worldwide use.
The unit was supplied with an appropriate power cord for North
America. You may need to purchase a safety-approved power
cord terminating in an IEC C5 (“mouse ears”) connector. See
inside front cover for power requirements.
Ambient temperatures should not exceed 85 degrees F.
Please provide ample air circulation space around the unit.

AES/EBU Digital Audio Connections
On all units:
The dbFS level – the Penteo processor’s digital input clip level – is
fixed at 0dB relative to the maximum digital 24-bit word,
±8,388,607.
Measured levels are relative to that dbFS level throughout all
Penteo processing and do not change internally..
Per the AES3 standard, each digital input or output line carries a
pair of audio channels. The connection is 110Ω balanced. The
AES3 standard specifies a maximum cable length of 100 meters.
The alternate AES3id standard, over coaxial cable, is best for
longer cable runs up to 1000 meters. This specifies 75Ω
unbalanced coaxial cable, terminated in male BNC connectors,
appearing the same as a professional video cable. Balun
transformers (available from Penteo or from Neutrik) are required
to interface an AES3id connection to the digital audio input or
output.
The wordclock / AES3id sync input is designed for 75Ω operation.

AES/EBU Digital Audio Connections
Theoretical considerations aside, we have observed that it is usually
possible to interconnect AES3id and AES3 connections without
difficulty if the cable length connecting the inputs and outputs is
short. Likewise, it is usually possible to interconnect AES3, AES3id,
and S/PDIF connections without difficulty over short cable runs, as
S/PDIF and AES3 connections share most common protocol features,
and many hardware chipsets now transparently interconnect them.
One possible warning: AES3 output signal levels could overload, and
possibly damage S/PDIF inputs without appropriate electrical
padding.

Rear Panel Audio Connections
Depending on which model you have, one of the following
connection sets will apply to you:
PostPro-D (Digital Output) I/O
Two identical-size high-density-DB26 connectors appear on the
back panel of the unit. Facing the rear panel, the left connector is
for fixed 48kHz use, while the right connector can be used for
non-48kHz digital sources via onboard sample rate conversion.

Rear Panel Audio Connections:
An optional D-sub to XLR breakout cable is normally supplied with
the unit, which terminates in XLR AES/EBU (AES3) connectors.
These XLR connectors are labeled and color coded and function as
follows:
IN 1 Stereo Input OUT 1 Fronts Out
IN 2 Unused OUT 2 Center/LFE Out
IN 3 Unused OUT 3 Rears Out
IN 4 Unused OUT 4 Stereo Downmix Out
The pinout diagram of the 26-pin D-Sub connector is on page 30.
Wordclock in is provided on a female BNC connector. It must be
enabled through a front panel menu option using F5 followed by
the down arrow key to access the “Change Clock Source” option.
Input Wordclock must be 48kHz.

Tech Notes
Penteo PostPro-D Input/Output:
Digital audio supplied to the “48k Only” connector must
have a 48 kHz sample rate. Audio with other sample rates
must be connected to the “SRC” connector.
Because all Penteo internal processing is based on 48kHz
sampling, the Penteo algorithm must take place at 48kHz, and the
unit's output will always be output at 48kHz.
To use the Penteo PostPro-D with an input other than 48kHz
(for example, with a CD Player's 44,1 kHz S/PDIF output with
appropriate adapter cabling):
• If 48k house clock is desired for output clocking, connect
an appropriate 48k wordclock source to the BNC
connector.
• Power up the Penteo PostPro-D, with the BNC external
input connector as the clock source (see page 28).
If no house clock is needed, the BNC connector
need not be physically connected to anything; it will
default to internal clock at 48kHz. Conversely, If a clock is
supplied to the BNC connector, it MUST be supplying a
48kHz timing.
AFTER THE PENTEO UNIT HAS INITIALIZED TO AN AUDIO
PROCESSING MODE:
• Ensure that the Penteo cable is connected to the
SRC connector(rightmost as viewing the rear of
the unit)
• Select “SRC Connector” as the audio source (Input
Select under function key F4 menu options.).
• Connect the source to “IN 1” on the Penteo audio
cable.
• Connect or power up the digital audio source.
Following the above order forces the unit to first establish
its 48kHz clock, then sample rate convert the incoming
44.1 audio.

PostPro-A (Analog Output) I/O
pin connector handles the digital audio and wordclock inputs.
The 25-pin connector handles the analog audio I/O cables, while the 15-
Two unequal size D-Sub connectors appear on the back panel of the unit.

Cables coming from the 25-pin connector
IN 1 Stereo Left Input OUT 1 Front Left Output
IN 2 Stereo Right Input OUT 2 Front Right Output
OUT 3 Center Output
OUT 4 LFE Output
OUT 5 Rear Left Output
OUT 6 Rear Right Output
Cables coming from the 15-pin connector
LTC IN Unused Digital
In XLR
AES/EBU (AES3)
Input
LTC OUT Unused Digital
Out XLR
AES/EBU (AES3)
Downmixed Stereo Output
CLOCK IN 48k House Clock In
(Optional)
CLOCK OUT 48k House Clock Out
(Optional)
Wordclock in is provided on a female BNC connector. For use, it
must be enabled through a front panel menu option using F5
followed by the down arrow key to access the “Change Clock
Source” option. Input Wordclock must be 48kHz.

Tech Notes
Penteo PostPro-A Input/Output:
Analog input level reference:
The Penteo analog input level is calibrated to the maximum
digital 24-bit word, ±8,388,607, referenced to an incoming analog
signal of +20dBu. 16db below that level (+4dBu) is considered an
optimum 0VU input level.
Digital Inputs:
Because all Penteo internal processing is based on 48kHz
sampling widths, the Penteo algorithm must take place at 48kHz.
To use the Penteo PostPro-A with a digital input other than
48kHz (for example, with a CD Player's 44,1 kHz S/PDIF output
with appropriate adapter cabling):
• If 48k house clock is desired for output clocking, connect
an appropriate 48k wordclock source to the BNC
connector.
• Power up the Penteo PostPro-A, with the BNC external
input connector as the clock source (see page 28).
• If no house clock is needed, the BNC connector
need not be physically connected to anything; it will
default to internal clock at 48kHz.
If a clock is supplied to the BNC connector, it MUST be
supplying 48kHz.
AFTER THE PENTEO UNIT HAS INITIALIZED TO AN AUDIO PROCESSING MODE:
• Connect the source to the “Digital In” XLR connector.
• Connect or power up the digital audio source.
Following the above order forces the unit to first establish its
48kHz clock, then sample rate convert the incoming 44.1 audio.

Operation
Front Panel Controls
• LCD Screen Display shows menu items and provides control-
setting information.
• Function Keys provide fast access to the menu system:
F1 Operating Mode Menu
F2 Front/Rear Balance Control
F3 Center Boost Control
F4 Misc Options: Solo, Solo Location, Input Select
F5 Test/Setup: Clock source, Software Update
• Arrow Keys and OK Circle allow you to scroll through the
Penteo processor’s menus and to set certain operating parameters.
• Power Key and LED Power Indicator
ALSO
• USB Port (behind door) permits easy software upgrades.
Powering On and Off
Press the power key briefly to turn the unit on, illuminating the
LED display.
Press the power key briefly to turn the unit off. The unit will
perform some necessary housekeeping, then shutdown, within 30
seconds.
As with any OS-based embedded system,
Avoid hard power downs when possible which
could cause reboot problems.

Using The PostPro
NEW USERS, START HERE.
Stereo recordings, since their beginnings in the 1950's, have
capitalized on their ability to aurally portray a left-to-right
panorama – aurally parallelling wide-screen movies – with
incidental (in the case of true stereo recordings) or specifically
panned discrete tracks spread out to form a wide panorama. This
effect is particularly noticeable and pleasant on headphones, or
much more commonly, modern earbuds.
Traditionally, stereo sound recordings, for many obvious reasons,
have usually had a center-placed lead vocalist, musician, actor or
narrator appearing in equal levels in both left and right speakers.
Decades of stereo's listeners have become accustomed to this
experience.
With 5.1, we now have a dedicated center speaker, – which makes
it possible to remove that lead vocalist from the left and right
speakers and place him or her in the center channel.
But should we? There are arguments on both sides:
Arguments FOR Hard Center:
• By focusing the lead singer or musician in the center
speaker only, it tends to sound like a real, hard, single-
point source, effectively appearing though the musician or
singer is physically in the room.
• When listening at the sweet spot of a mix console, the
center is quite solidly focused, and a single center speaker
physically recovers and solidly anchors that effect.

Using The PostPro
Arguments AGAINST Hard Center:
• Listeners have become accustomed to hearing a lead
musician or singer spread out across the entire sound
field, across the width of the whole room or automobile.
• By removing the lead singer or musician from the front left
and front right speaker, their mix dominance will only be
maintained when the listener is in a proper position, near
the center speaker.
• The discreteness of the mix means that it might be easy to
miss vital parts of the mix if not properly reproduced.
• It simply sounds “too stark and discrete”.
As with many things in the entertainment field, there is no correct
answer; it's a matter of taste and artistic leaning.
For that reason, we provide several modes of operation, designed
to please the different mix philosophies. They are discussed in
detail starting on page 20.
No matter which mode or balance
option you choose, the stereo downmix
will always remain an exact replica of
the original.

Using The PostPro
CENTER BALANCE CORRECTION TEST
“It is impossible for any machine to ever be able to
determine what the original stereo mixer intended to be
panned to the absolute center of the mix. Ever.”
- John Wheeler, April, 2010
The Penteo process uses one simple criteria to determine what
sounds are to be placed in the center channel and, conversely,
caused to not appear in the sides:
In Penteo, the waveforms that are identical in frequency, phase, and
amplitude in both the left and right channels are placed in the center.
A simple linear taper is extended from the center to each endpoint.
Throughout the history of analog recording, left vs. right balance
just didn't need to be critically matched down to more than one
decibel or two. One or two decibels left-heavy or right-heavy
never hurt a thing, and it was essentially inaudible.
Penteo, however, uses the “matchingness” to determine what
waveforms appear in the center, and conversely, are eliminated
from the sides. Those slight, almost inaudible balance errors can
become apparent on the rear extracted channels if they are large
enough.
Occasionally compounding this problem is incorrect NAB/CCIR
playback equalization on one channel only, causing Penteo
processed vocal sibilants to leak to one side or the other.

Using The PostPro
The Penteo process is an excellent testing tool
to determine the proper left vs. right balance of
a stereo mix, down to 0.2-0.3db.
In order to match the left and right channels as accurately as
possible, the Penteo PostPro unit has a built-in Channel Balance
Correction Test, helping you to determine the most accurate left-
vs-right channel balance for the stereo audio presented to the
Penteo process.
As stated above, it is impossible for a machine to determine what
the original stereo mixer may have intended to be panned to the
center. Indeed even a human can only make an educated guess,
especially on a mix on which many different or unusual pan
placements are used, as to what the original mixer intended as the
center.
With that in mind, the Penteo Channel Balance Correction Test
can be performed with these steps:
The most accurate results are obtained
by performing this test using headphones.
• Press the left or right keys of the keypad circle.
Either key places the unit in Channel Balance Test mode.
• That first press does NOT change the channel balance, it
simply places the unit into test mode, in which the center
is eliminated, and the sides are presented to the front
outputs.
• Subsequent presses of the key shift the channel balance to
the left and right up to 3db in each direction.
• The goal of shifting is to eliminate the center-panned
audio. This can be an art, in that critical listening and
educated guessing may be needed to determine what the
original mixer intended as the center-panned sounds.

Using The PostPro
• Once the center is eliminated as best as possible, press the center
button in the circle. This will lock that channel balance offset.
• THE UNIT WILL FLASH CONTINUOUSLY in order to
alert you that the unit is “off center”.
• Press the left/right circle keys as necessary to restore
balance when complete, and the unit will cease flashing.
Special circumstances when the center cannot be
eliminated:
• Sibilants (S sounds) on a center-panned vocalist that appear in
the left or right as ghost images are often caused by unbalanced
high-frequency EQ. You will need to lower the high-frequencies
on the stereo source material on one channel only – the channel
the ghost sibilants appear on – using trial-and-error to zero in on
the proper EQ match. Future Penteo software revisions are
planned to assist in these corrections without resorting to trial-
and-error.
• HAECO-CSG mixes, which primarily were performed at A&M
Records in the 1970's, have one channel rotated in phase by 90
degrees. The stereo mix must be re-rotated prior to Penteo
processing. The Voxengo PHA-979 works well for this process.
(www.voxengo.com)
• Any variety of phase or delay effects which have been used that
cause the left and right channels to be out of phase or delayed in
time.

Using The PostPro
BASIC OPERATION
To choose an audio mode from the front panel:
1. Press the F1 button. The current audio mode will be
displayed.
2. Press the up or down button to cycle through the available
modes.
3. Press the Enter button to confirm it.
Audio Modes
The Audio Modes are:
• HARD CENTER
• PENTEO MUSIC
• STEREO PLUS
• QUADRAPHONIC
• THREE FRONTS
• TRIANGLE
Hard Center Mode:
Hard Center mode isolates center material to the center
speaker only.
It can be used for music when it is desirable to separate out the
center-panned lead singer or musician into the center speaker
only. It is also ideal for motion picture and television
upconversion of an already-finished stereo mix, as all center
dialogue will be isolated to the center, with full left/right
separation in the fronts and rears.
The front pair receives the extracted pure sides plus bass
diversion from the center, if selected. See Bass Redirect Toggle, p 26
The rear pair receives the extracted pure sides only.
In Hard Center mode:
The F2 Key accesses front/rear balance control.
The F3 Key accesses center boost level control.

Using The PostPro
Penteo Processing Modes
Penteo Music Mode:
In Penteo Music Mode, material panned to the center appears
loudest in the center speaker, but some also appears in the
front left/front right pair.
This mode is optimized for music, keeping the center channel
vocalist loudest in the center, but not so discrete as to offend
listeners who are accustomed to a broad center vocalist coming
from the full width of the stereo field.
The front pair also receives bass diversion, if selected. See
Bass Redirect Toggle, p26.
In Penteo Music mode:

Using The PostPro
Stereo Plus Mode:
In Penteo's Stereo Plus Mode, the original stereo mix appears
in the left front/right front pair, while those sounds that were
exclusively in the left-side of the stereo mix appear in the left
rear, the center panned material in the center, and the sounds
that were exclusively in the right appear in the right rear.
This version has the added advantage of making extension
speakers, for example in a large home, possible, by simply
extending the left front and right front pair throughout the
house, as it contains the entire original stereo mix.
Because all sounds are in-phase, a phantom center is created in
front of the left front and right front speakers by the left rear
and center and right rear and center speakers respectively.
The front pair also receives the extracted pure sides with bass
diversion, if selected. See Bass Redirect Toggle, p26.
In Stereo Plus mode:

Using The PostPro
Quadraphonic Mode:
In Penteo's Quadraphonic Mode, exclusive-left material is
directed to the left rear, exclusive-right material is directed to
the right rear, and the front pair receives a stereo mix with
additional center level added to precisely counterbalance the
rears.
This mode can be used for post-production situations in which
it is desirable to drop a center channel announcer into the
center speaker, avoiding competition with a lead vocalist or
musician in the center speaker.
In Quadraphonic mode:
Three Fronts Mode: (silent rears)
In Three Fronts Mode, the left rear and right rear remain mute.
The stereo mix is precisely replicated across the front three
speakers, with the phantom center replaced with a real one.
This mode is useful for extracting 1960s left/center/right mixes
into a three-fronts performance.
Triangle Mode: (silent front left/front right)
In Three Fronts Mode, the left front and right front remain mute.
The exclusive left is routed to the left rear, the exclusive right to
the right rear, with the exclusive center in the center.
This mode is designed for large venue use, such as in dance clubs,
in which it would be difficult for listeners to audibly resolve five
separate surround channels.

Using The PostPro
Mode Modifications: The F2 and F3 keys
In Hard Center, Penteo Music, and Stereo Plus modes, the F2 and
F3 keys provide additional flexibility:
F2. Front/Rear Balance:
Front/Rear balance is variable in steps up to 6db toward the front
or rear. The balance is counterbalanced for downmix accuracy so
it does not effect the resulting stereo downmix.
F3. Center Boost:
Additional level is added to the center speaker, and removed from
the front left and front right, adding additional center boost in
problem situations in which the center just doesn't seem loud
enough.
SPECIAL CENTER BOOST NOTE:
Because Center Boost must add center channel boost while remaining
counterbalanced for downmix accuracy, the center channel
information will be subtracted from the front left and front right.
On modes such as Hard Center, this will cause some of the center
information to also appear at a low level in the front left and front
right speakers 180 degrees out of phase with the center channel itself.
This is not ordinarily a problem or cause for concern, and acoustically
helps to focus the center.
The resulting downmix is still accurate (as all Penteo downmixes are).

Using The PostPro
Miscellaneous Options: The F4 key
The F4 key is the gateway to several options:
• CHANNEL SOLO
• SOLO LOCATION
• LFE ON/OFF
• BASS REDIRECT ON/OFF
• DOWNMIX ON/OFF
• INPUT SELECT
F4  CHANNEL SOLO
This menu selection allows the user to scroll through each
channel individually as well as through channel pairs. Combined
with the "Solo In Place" option explained below, channel
identification is possible to ensure proper set up.
The available options are:
• Solo OFF
• Solo LEFT FRONT
• Solo LEFT REAR
• Solo RIGHT FRONT
• Solo RIGHT REAR
• Solo CENTER
• Solo FRONTS
• Solo REARS
• Solo LFE
• Solo LEFT PAIR
• Solo RIGHT PAIR

Using The PostPro
F4  SOLO LOCATION
This menu selection allows the user to select where the output of
the solo option in F4: CHANNEL SOLO above is placed.
The solo can be output in place to the appropriate speaker,
redirected to the center speaker only, or redirected to the front
left/front right pair.
This location selection remains permanent until reselected.
The available options are:
• Solo In Place
• Solo In Center
• Solo In Fronts
F4  LFE TOGGLE
Penteo low-pass filters the sounds below 100Hz, and creates
subsonic material for the LFE channel.
This option can be disabled by setting LFE to OFF, leaving the
LFE channel silent.
This option remains permanent until re-selected.
Regardless of the LFE option, no bass is removed from any
of the 5 surround channels.
F4  BASS REDIRECT TOGGLE
Most home 5.1 listeners do not have a center channel speaker
which is capable of reproducing bass frequencies. When this
option is enabled, the PostPro unit redirects sounds the bass
frequencies below 100 Hz from the center channel to the front
left/front right pair, where a 5.1 listener will have full range
speakers.

Using The PostPro
F4  STEREO DOWNMIX TOGGLE
Both the PostProA and the PostProD provide a simultaneous
downmixed stereo output, delayed and in-phase with the 5.1
output.
• On the PostProA, the downmix appears on the AES/EBU
digital output.
• On the PostProD, the downmix appears on output pair 4.
This stereo downmix can be turned ON or OFF with this option..
F4  INPUT SELECT
Provides access to digital vs analog inputs on the PostProA, and
provides access to SRC or 48k Only inputs on the PostProD.
The available options are (PostProA):
• Analog In
• Digital In
The available options are (PostProD):
• 48k Only Connector
• SRC Connector

Using The PostPro
Test/Setup Options: The F5 key
The F5 key is the gateway to several test/setup options:
• All Tests Off
• Change Clock Source
• Null-Out Test
• Simple Downmix
• Downmix @Match Level
• Downmix Mono
• Loop @Sound Card
F5  CHANGE CLOCK SOURCE
There are three possible clock sources for the PostPro unit:
1. Internal clock (select BNC external connector with
nothing connected to the wordclock connector).
2. External Wordclock (select BNC external connector
with valid 48kHz wordclock connected to the BNC).
3. Clock on Digital Audio 1 in: Unit locks to clock on the
incoming digital audio stream on Input 1.
For the PostPro A (Analog) unit, clock source will default to
internal if no clock is supplied to the external BNC input or the
digital audio input, regardless of choice.
For most digital audio use, select the Digital Audio In clock,
unless your facility has a house wordclock distribution system..

Using The PostPro
F5  NULL-OUT TEST
Provides reassurance that the Penteo process is downmixing back
to the original stereo by mixing the delayed original source with
the downmixed 5.1 upmix, but 180 degrees out of phase,
producing silence.
F5  SIMPLE DOWNMIX
Simple addition of the left rear plus the left front plus the center
to the front left channel; the extracted right rear plus the right
front plus the center to the front right channel.
F5  DOWNMIX @ MATCH LEVEL
Identical to “Simple Downmix” above, but lowered by 6db to
lower the “doubled” levels to match the input level.
F5  DOWNMIX MONO
All channels are added together and sent to the front channels.
This has no padding and can easily overload the output,
producing distortion, but is a quick-and-dirty mono test.
F5 LOOP@SOUND CARD
Sends the samples received by the Penteo processor from the
sound interface and loops it directly back without any processing.

Connector Pinouts
PostPro D SRC and 48k Connectors:
Pin Signal Pin Signal Pin Signal
1 Clock Gnd 10 Clock In
2 out4 Cold 11 out4 Hot 19 out4 Gnd
3 out3 Gnd 12 out3 Cold 20 out3 Hot
4 out2 Cold 13 out2 Hot 21 out2 Gnd
5 out1 Gnd 14 out1 Cold 22 out1 Hot
6 IN4 Cold 15 IN4 Hot 23 IN4 Gnd
7 IN3 Gnd 16 IN3 Cold 24 IN3 Hot
8 IN2 Cold 17 IN2 Hot 25 IN2 Gnd
9 IN1 Gnd 18 IN1 Cold 26 IN1 Hot

Connector Pinouts
PostPro A Analog Connector
PIN SIGNAL PIN SIGNAL
1 OUT 4 POS 14 OUT 4 NEG
2 OUT 4 GND 15 IN 4 POS
3 IN 4 NEG 16 IN 4 GND
13
PostPro A Digital/Clock Connector
PIN SIGNAL PIN SIGNAL
1 9 DIGITAL OUT POS
2 10 DIGITAL IN NEG
3 11
4 SYNC IN POS 12
5 DIGITAL IN POS 13
6 14 CLOCK OUT POS
7 15 DIGITAL OUT NEG
8 CLOCK GND

Specifications
Penteo PostPro D
Inputs: 24-bit AES/EBU, transformer coupled
Sample Rates:
Input:
• 48k Only Connector: 48kHz Only
• SRC Connector: All Standard and Variable
Sample Rates to 96kHz
Output:
• 48kHz Fixed, 24-bit AES/EBU
SRC Dynamic Range: 142db
Clocking:
• Digital Input
• External Wordclock on BNC,
• Internal Clock (on-board low-jitter crystal oscillator)
Connections:
• Two 26-pin female high-density D-sub connectors
• External Clock: 75-ohm BNC Wordclock
Cables(optional):
26-pin male high-density D-sub to:
• four female XLRs (AES Inputs)
• four male XLRs (AES Outputs)
• BNC connector (Wordclock In).
Processing dynamic range: 144db
Power requirements: 100-240V, 50-60Hz, 2.5A Max
Internal Power Supply Certifications:
CE / FCC / VCCI Certifications: EN55024, EN55022 Class B (CE
certification), Australia / New Zealand (using CISPR 22, EN55022),
Japan (VCCI: using CISPR 22, ANSI C63.4), United States (FCC Part
15, Subpart B, Class B), Canada (ICES-003 using CISPR 22, ANSI
C63.4).
External Power Supply Certifications: UL/CUL(12V,17V), TUV,
PSE(15.1~17V), CCC, CE, CB, FCC part 15 class B and EN 55022 class B

Specifications
Penteo PostPro A
Analog Inputs:
Balanced XLR connectors, +4 dBu nominal /+20dBu max.
Analog In Performance
• Frequency Response
20 - 20 kHz, ± 0.05 dB at 44.1 kHz sample rate
• Dynamic Range 117 dB, A-wtd.
• Signal-to-Noise 116 dB, A-wtd.
• Channel Crosstalk <-120 dB, 1 kHz signal @ -1dBFS
• THD+N -104 dB (0.0006%) @ -8 dBFS, 1kHz signal 22Hz-22kHz
Analog Out Performance
• Frequency Response
20 - 20 kHz, ± 0.05 dB at 44.1 kHz sample rate
• Dynamic Range 117 dB, A-wtd.
• Signal-to-Noise 117 dB, A-wtd.
• Channel Crosstalk <-120 dB, 1 kHz signal @ -1dBFS
• THD+N -104 dB (0.0006%) @ -8 dBFS, 1kHz signal 22Hz-22kHz
Digital Inputs:
AES/EBU or S/P DIF format, transformer coupled,
on XLR connectors.
Digital Output: 48kHz Fixed, 24-bit AES/EBU
Sample Rates: (via On-board Sample Rate Conversion):
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
SRC Dynamic Range: 128 dB
Clocking:
• Digital Input
• External Wordclock on BNC,
• Internal Clock (on-board low-jitter crystal oscillator)
Connections:
• 25-pin female D-sub connector (analog audio I/O
• 15-pin high-density female D-sub connector (digital I/O)

Specifications
Penteo PostPro A (cont'd)
Cables(optional):
• 25-pin male D-sub to male and female XLR connectors
on six-foot shielded twisted pair cabling (analog audio)
• 15-pin high-density male D-sub to
• (1) male and (1) female XLRs (digital audio I/O)
• (4) female BNC connectors (clock)
Processing dynamic range: 144db
Power requirements: 100-240V, 50-60Hz, 2.5A Max
Internal Power Supply Certifications:
CE / FCC / VCCI Certifications: EN55024, EN55022 Class B (CE
certification), Australia / New Zealand (using CISPR 22, EN55022),
Japan (VCCI: using CISPR 22, ANSI C63.4), United States (FCC Part
15, Subpart B, Class B), Canada (ICES-003 using CISPR 22, ANSI
C63.4).
External Power Supply Certifications: UL/CUL(12V,17V), TUV,
PSE(15.1~17V), CCC, CE, CB, FCC part 15 class B and EN 55022 class B
©2010, PenteoSurround, Inc.

PenteoSurround, Inc.
“No Nonsense” Standard Service and Support Warranty
If you find physical defects in the materials or the workmanship used in
making the product described in this document, PenteoSurround, Inc.
“Penteo” will repair, or at its option, replace, the product at no charge to
you, provided you return it shipping prepaid, during the 12-month period
after the date of your original purchase of the product.
Information is subject to change without notice and does not represent a
commitment on the part of Penteo.
This is Penteo's only warranty and your exclusive remedy concerning the
product. All other representations, warranties or conditions, express or
implied, written or oral, including any warranty of merchantability, fitness for
a particular purpose or non-infringement, are expressly excluded. Except as
set out above, the product is sold "as is" and you are assuming the entire
risk as to the products suitability to your needs, its quality and its
performance.
In no event will PenteoSurround, Inc. be liable for direct, indirect, special,
incidental or consequential damages resulting from any defect in the
product or from its use, even if advised of the possibility of such damages.
All exclusions and limitations of this warranty are made only to the extent
permitted by applicable law and shall be of no effect to the extent in conflict
with the express requirements of applicable law.

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