Smyth Research Realiser A8 Manuale utente

SMYTH

SMYTHSMYTH

SMYTH RESEARCH

RESEARCH RESEARCH

RESEARCH

Realiser A8 system

including Stax SRS-2050 II headphone set and optional Smyth monitor bridge

User manual

for firmware dated 3 August 20

The Realiser is defined by its firmware, which is

updated from time to time with refinements and new

features. Likewise the manual is updated to conform

with new firmware, and to provide additional

information.

Current firmware and the current manual are available

on the Smyth Research website at:

www.smyth-research.com

lease check regularly for firmware and manual

updates and keep both current. There may be

significant differences between the operation

described here and that for other firmware versions.

CONTENTS page

Safety 3

Firmware update 5

First look and initial steps

Unpacking 9

arts assembly 10

Front panel 14

Rear panel 16

IR Remote control 17

Connections 22

ower on and off 24

Factory default emulation 24

Volume control and mute 25

Setting the clock 26

I/O assignment and angle entry 27

Basic procedures

ersonalisation basics step by step 30

reset basics step by step 38

Listening basics step by step 42

Additional controls, functions and information

Bypass functions 45

Solo, mute and test signals 47

File operations 48

Text entry 51

Virtual speaker controls 52

RIR optimisation 58

H EQ optimisation 61

RIR measurement modes and multiplying speakers 63

Azimuth and look angles 72

Tactile outputs 76

Direct bass 77

Head tracker controls 79

Dual-user mode 82

S L calibration and readout 85

Other controls 86

assword protection 91

System, preset and clock memory 93

Bass considerations 94

Monitor bridge 99

Specifications 102

The Stax SRS-2050 II system bundled with the Realiser includes its own instructions. lease read

them for information specific to the headphone and its amplifier.

In this manual, legends which appear on the Realiser screen, front panel, rear panel, or remote control

are reproduced in THIS TYPEFACE

IMPORTANT SAFETY INSTRUCTIONS

READ BEFORE OPERATING EQUIPMENT

• Read these instructions.

• Keep these instructions.

• Heed all warnings.

• Follow all instructions.

• Do not use this apparatus near water.

• Clean only with a dry cloth.

• Install in accordance with the manufacturer’s instructions.

• Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus

(including amplifiers) that produce heat.

• rotect the power cord from being walked on or pinched particularly at plugs, convenience

receptacles, and the point where they exit from the apparatus.

• Only use attachments/accessories specified by the manufacturer.

• Unplug this apparatus during lightning storms or when unused for long periods of time.

• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been

damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects

have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate

normally, or has been dropped.

• Never expose the equipment to rain or a high level of humidity. For this reason do not install it in the

immediate vicinity of swimming pools, showers, damp basement rooms or other areas with unusually

high atmospheric humidity.

• Do not use the device/s outside. To reduce the risk of fire or electric shock, do not expose this/these

device/s to rain or moisture.

• Never place objects containing liquid (e.g. vases or drinking glasses) on the equipment. Liquids in the

equipment could cause a short circuit.

• Lay all connection cables so that they do not present a trip hazard.

• Check whether the specifications comply with the existing mains supply. Serious damage could occur

due to connecting the system to the wrong power supply. An incorrect mains voltage could damage the

equipment or cause an electric shock.

• Never place open flames near the equipment.

• If the equipment causes a blown fuse or a short circuit, disconnect it from the mains and have it

checked and repaired.

• Do not open the equipment without authorisation. You could receive an electric shock. Leave all

service work to authorised expert personnel.

• Do not hold the mains cable with wet hands. There must be no water or dust on the contact pins. In

both cases you could receive an electric shock.

• The mains cable must be firmly connected. If it is loose there is a fire hazard.

• Always pull out the mains cable from the mains and/or from the equipment by the plug, never by the

cable. The cable could be damaged and cause an electric shock or fire.

• If the power cable is connected, avoid contact of the unit with other metallic objects.

• Do not insert objects into openings. You could damage the equipment and/or injure yourself.

• Do not use the equipment if the mains plug is damaged.

• When installing the device into a 19" rack, make sure that the mains switch, mains plug and all

connection on the rear of the device are easily accessible.

• When connecting the headphone do not place the headphone on your head until you are sure that

there is no sound being played.

• When connecting the headphone, ensure that the volume is turned down to minimum. Adjust the

volume after putting on the headphone. Do not set the volume too high, because you could

permanently damage your hearing. Over time you may adapt to a high volume of sound but it can still

cause hearing damage.

• Connecting and disconnecting cables, choosing menu items, and any adjustments should be done at a

low volume setting and with the headphones off your head, to avoid sounds that could cause hearing

damage.

• With wired headphones you should avoid sharp movements, which could cause the headphone to fall

off your head. You could be seriously injured especially if you are wearing pierced earrings, spectacles

etc. The cable could wind around your neck and cause strangulation.

• Take the headphones off when changing presets, until you are familiar with the presets.

FIRMWARE UPDATE

If you are unfamiliar with the Realiser, please read this manual for information about power up,

connection, and menu use.

If you are an experienced user and have downloaded this manual with new firmware:

General instructions for firmware updates

To inspect the currently loaded firmware version, press the FILE key. The screen will say, for

example:

SMYTH RESEARCH

SVS REALISER A8

REV:03 AUG 2011 XY

The letters after the date are not pertinent to the firmware revision. The first letter is a flash memory

diagnostic. The second letter is the hardware I . (See below.)

The firmware in the Realiser is easily updated. New versions can be downloaded from the Smyth

Research web site at www.smyth-research.com. The file will have the name SRCE0001.SVS.

Obtain an SD card 2 GB or smaller in capacity. The card must be formatted FAT16 (often simply

called FAT), not FAT32. A card 2 GB or less in size will typically be formatted FAT16, or you can

reformat it FAT16 using a computer if necessary. Cards larger than 2 GB cannot directly be formatted

FAT16.

Copy the file onto the root directory of the SD card. Other files can be in the root directory along with

SRCE0001.SVS. ut the card into the slot on the front panel.

ress (!). The screen will say:

>SAVE SYSTEM CONFIG

UP ATE REALISER SW

CONTROL MENU

PASSWOR OPTIONS

Note: this screen may differ according to the firmware generation.

Choose UPDATE REALISER SW and press OK. The Realiser must not be powered off during the

update process. New firmware must be loaded twice in succession. After the first load, load the

firmware again: press (!) again, choose UP ATE REALISER SW again and press OK again.

Specific instructions for firmware of 3 August 2011

If you are updating from a firmware version earlier than 7 June 2 1 :

The first time this version is loaded, the remote control will be disabled.

To enable it, press TC (SUB on older remote controls).

Then press (!). The screen will show that the cursor is on SAVE SYSTEM CONFIG.

ress OK to save the configuration.

Hardware ID

The LCD display and audio muting circuit have been changed over several generations of Realisers.

The Realiser is meant to identify which types are present, but some early Realisers sometimes mis-

identify the type. Therefore an I code can be entered manually.

To see the current hardware I , press the FILE key. You will see the firmware version screen

illustrated above. The last character on the last line is the hardware I . If the character is not A, B, C

or , the hardware I has not been set.

To set the hardware I , first determine which code you need to enter according to the type of LCD

display and the presence of HDMI. The codes are:

A black characters on a white background, no HDMI

B white characters on a blue background, no HDMI

C white characters on a black background, no HDMI

white characters on a black background, HDMI

To enter the I , press MENU, then (.). The screen will say:

> I :ì LINE 1

LINE 2

LINE 3

LINE 4

The junk character ì is an example and indicates that the I has not been set.

Use the < and > keys to choose A, B, C or . The LINE entries on the screen illustrate the order of the

four text lines as determined by the I . They should read 1, 2, 3, 4 in order. With the correct I

entered and the lines in correct order, press (!) to save the I , or CANCEL to abort the operation.

Change in firmware of 3 August 2011

Fix:

For series 09 Realisers without HDMI (I =C), prevents analogue audio input shutoff after pressing

MENU-MO E. (MENU-MO E accesses the input selector menu, which is not a valid key sequence for

Realisers without HDMI.)

Features and changes in firmware of 21 uly 2011

The following are the most significant changes. Not all refinements are listed.

New features:

1. HDMI support.

2. Dual-user mode with independent RIR, H EQ, and head tracking.

3. reset saving to SD card.

4. Automatic backup of all files to SD card.

5. Linear taper can be applied to RIR with user-definable start and end points.

6. Microphone calibration and test procedure.

7. Optional password protection.

8. Headphone limiter threshold and release controls.

9. For optional meter bridge, phase meter adaptation rate control.

Changes:

1. For presets, RIR and H EQ files are automatically saved to non-volatile memory when loaded,

and preset erasures are also non-volatile. arameters remain volatile until a preset is saved.

2. The toggle (on/off with same button) functions of the MIX and PASS keys have been dropped to

prevent inadvertent re-switching by holding the key too long. The SVS key cancels MIX or PASS, as

before.

3. In the ALL mode, a virtual centre speaker is generated automatically not only when only L and R

speakers are selected for measurement, but also when any number of speakers is selected (omitting C).

4. When head tracking is disabled (T ), the head angle is set to the RIR look-centre angle.

5. The channel 7 and 8 outputs are driven when the tactile output is disabled.

6. Rev. 2.0 file format ( RIR20XX.SVS, H EQ20XX.SVS), enabling future enhancements.

7. For the ONE mode, speaker delays all conform to the delay measured during the first sweep.

8. For the LsRs and LbRb modes, the fixed speaker delays are reduced to 8 ms (384 samples).

Fix:

Hardware ID menu fixes occasional display line transposition and power up/down thumps in early

Realisers.

Features and changes in firmware of 7 une 2010

The following are the most significant changes. Not all refinements are listed.

1. The ALL speaker measurement procedure now allows measurements of a speaker or speakers to be

made separately in stages. This provides a completely flexible way to create multiple virtual speakers

in different locations and with different channel assignments from lesser numbers of real speakers. As

a result, a channel on/off screen appears at the end of every measurement sequence to specify which

channels are to be saved. For the typical ALL procedure, the channels will be set the same as when the

measurement sequence began, in which case one additional OK keystroke is required.

2. Direct mixing of bass (LFE and/or redirected bass) into the headphones is now possible. This is for

situations where there is no real subwoofer to be measured, or where there is only an inferior

subwoofer, or where the room has modes that make low frequency performance problematic.

3. The ONE, LsRs and LbRb speaker measurement procedures now allow subwoofer (or other)

measurements to be added, so 5.1 and 7.1 are now possible in addition to 5.0 and 7.0, etc.

4. The ONE, LsRs and LbRb speaker measurement procedures now use the default channel

assignments.

5. Virtual loudspeaker arrays assigned to the same channel can now be created from a single real

speaker by using an option in the AVG LOOK C menu which allows multiple sweeps to run with

pauses between sweeps. During the pauses, a speaker can be moved to different locations. The typical

application is to generate multiple virtual subwoofers from a single real subwoofer.

6. Measurement processing has been refined to improve the capture of multiple speaker arrays.

7. The TE screen is no longer momentary; it remains until CANCEL is pressed.

8. Manual EQ now uses thirty-one uniform 500 Hz filter bands (except for the last band).

9. A CONTROL MENU has been added, allowing enable/disable of UART and USB wired remote

controllers in addition to the IR remote.

10. The TE menu has been modified to accommodate wired head trackers.

11. For look angle adjustment of “looking centre” after measurement, the left and right speakers’

phantom centre image is now used instead of the centre speaker. Thus stereo and other RIRs which

contain no virtual centre speaker can be adjusted; and perceptual sensitivity is increased.

12. The H EQ inverse EQ compression factor (XFACT) bands are now 0-5 kHz, 5-10 kHz, and

10-24 kHz.

13. The head tracker SCOPE default is now HOL .

14. Channel assignment options now appear in SM TE/default order, and the C, LsRs and LbRb

measurement procedures use SM TE/default channel assignments.

FIRST LOOK AND INITIAL STEPS

UNPACKING

The Realiser A8 package includes all of the items below.

Realiser A8 processor

ower supply, 100-240 V AC, 50/60 Hz*

Remote control

Head-top head tracker

Clip for head-top

Set-top head tracking reference unit

Set-top head tracking reference unit base

Y-junction

In-ear microphones (2)

Foam earplugs for microphones, small, medium, and large

Cable, 3.5 mm plug to 3.5 mm plug, 4-conductor

Extension cable, 3.5 mm jack to 3.5 mm plug, 4-conductor

Lanyard (orange neck strap)

Stax SRS-2050 II headphone set (includes SR-202 headphones and SRM-252 II drive unit)

*The power supply works with any mains voltage and frequency and is provided with the mains plug

appropriate for the market to which the Realiser is shipped.

IMPORTANT: The Realiser and Stax power supplies have opposite polarity! Never plug the Realiser

power cord into the Stax drive unit, or the Stax power cord into the Realiser! Doing so will damage

the Stax amplifier and/or the Realiser!

PARTS ASSEMBLY

The head tracking system consists of two units: the head tracker itself, which sits atop the listener’s

head, and the head tracking reference, which is placed in front of the listener. For simplicity and

clarity, we will refer to these units as “head-top” and “set-top” respectively. The “set-top” may well be

placed atop a television “set” or display screen, or may not, but will always be centred in front of the

listener.

Clip for head-top

On the Stax headphones, identify the front vs. the back; to do this, look for the L and R markings at

each end of the headband. Snap the head-top clip onto the top of the headband so that the rectangular

socket is on the front of the headband.

Although the clip is designed to fit the Stax headband, it can be used with almost any headphones. To

attach to a headphone other than the Stax, turn the clip upside-down, place it on the top of the

headband, and secure it with a rubber band. The socket should be on the forward side of the headband.

The clip on the Stax headband.

The clip on another headband.

(Shown: Beyer DT 770.)

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