Genelec GLM 4 User manual

1 REGISTER YOUR PRODUCT
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learn more about warranty. By joining the Genelec Community, you’ll be able to
use all GLM Cloud features, ask questions, share experiences and participate in
discussions with Genelec users globally. More information about service and
technical support is available at www.genelec.com/customer-service.
2 PACKAGE CONTENT
3 GETTING STARTED
To take full advantage of your Smart Active Monitoring (SAM) system it is
important to become familiar with all the components in the system. More
detailed information can be found from the GLM 4, monitor and subwoofer
operation manuals.
To set up a monitoring system you will need monitors and subwoofers, audio
signal cables, GLM control network cables, GLM network adapter, GLM
measurement microphone, and computer with GLM 4 software.
To set up a Genelec SAM system,
•Check dip controls of the SAM subwoofers and monitors. Stored -
switch need to be turned ON if storing the settings to the SAM
subwoofers and monitors for the standalone use.
•Place SAM subwoofers and monitors in the monitoring room
•Run audio cables to the SAM subwoofers and monitors

•Run GLM network cables from the GLM adapter to all SAM subwoofers
and monitors
•Download and install the GLM computer software
•Create a system setup in the GLM software
Placing SAM monitors and subwoofers in the monitoring room
Try to place monitors and subwoofers in optimum locations in relation to surfaces
reflecting audio. Aim each SAM monitor towards the listening position. This
becomes your System Layout. More info about the correct monitor placement
available at https://www.genelec.com/monitor-placement
1. Select listening position so that distances from side walls (B) are equal.
2. Place monitors so that distances to the listening position are equal, and
distances to the monitors are equal from side walls (A).
3. Place a subwoofer at the front wall and a slightly left or right from the
room centre axis.
4. Aim monitors towards the listening position.

Figure 1. Place monitors symmetrically relative to the walls. Point the acoustical
axes towards the listening position.
Analog Stereo with a Subwoofer Example
Before cabling, turn off the power in all monitors and subwoofers.
•Connect (Left) audio cable from the source to the subwoofer connector
ANALOG IN 1.
•Connect a cable from subwoofer ANALOG OUT 1 to left monitor
ANALOG IN.
•Connect (Right) audio cable from audio source to subwoofer ANALOG IN
2.
•Connect (Right) audio cable from Subwoofer ANALOG OUT 2 to right
monitor ANALOG IN

Figure 2. Analog stereo cabling with a subwoofer
Cabling of the Control Network
The GLM control network cabling is very easy. Connect the GLM adapter to the
computer USB port using the supplied USB cable. Connect the GLM adapter to
all SAM monitors and subwoofers in daisy-chain fashion (Figure 3) using the
network cables supplied with each monitor and subwoofer. You can connect in
any order. Just be sure to connect all monitors and subwoofers.
Table 1. Connections on the GLM adapter (from left to right)
Connector
Use
USB (type B)
Connects the GLM adapter to a computer USB interface or
USB power supply (stand-alone volume control)
Volume (3.5 mm jack)
Connection for Genelec volume controller
Microphone (3.5 mm jack)
Connection for Genelec calibration microphone
GLM Net (RJ45)
GLM control network connection
Terminator (RJ45)
Return termination for the GLM control network from the
last monitor, in case of network cabling being greater than
100 meters.

Figure 3. Connections of GLM control network, measurement microphone, and
computer

Downloading and Installing GLM Software
The GLM software calibrates and controls Genelec SAM systems. The software
can be downloaded at www.genelec.com/glm.
You must have sufficient rights to install the software in your computer. Install the
software following the instruction given by the software during the installation
process. We recommend you install the software on the local hard drive. There is
no need to make any special destination folders, GLM creates these
automatically.
Figure 4. GLM software download
Creating a System Layout and Calibrating a System
Before launching the GLM software after installation, stop or mute the audio
source, ensure that all monitors and subwoofers are connected to the GLM
network and are powered on.
The steps to create a GLM System Setup with a system layout and calibration
are
1. Create a SAM monitoring system layout
2. Define SAM monitoring group preset
3. Run GLM AutoCal automatic calibration
4. Run GLM AutoPhase automatic phase calibration for subwoofers
(AutoPhase is only available when a subwoofer is included in a group)
5. Run GLM WooferCal automatic calibration for woofer system (WooferCal
is only available when an adaptive woofer system is included in a group)
For additional groups, repeat steps 2 - 5.

Creating a SAM Monitor Layout
To create a layout all monitors, subwoofers and woofer systems must be
powered and GLM network connections be made.
A layout defines your monitors and their locations in the room. An example in
Figure 5 shows a stereo system with a subwoofer.
A new system layout is created when the GLM user interface starts the first time.
You can always create a new layout by selecting the ‘File | New’ menu item.
When the creation of a new layout starts, initially all monitors, subwoofers and
woofer systems are stacked on the left side of the page.
1. The layout style selection –shows example positions for each system
(example positions can be skipped e.g. subwoofer can be placed
between Left and Right monitors).
2. The devices –The unplaced device cell on the right and the Not Used
device cell on the left. Start drag the device icon from the unplaced device
cell and the device will play the ID tone. Place the device icon to the
Layout grid (3) to the position that match its placement in your monitoring
system layout.
3. The Not Used device cell. This will be used e.g. with the SE System
where unused channels need to be told to GLM.
4. The layout grid –The monitoring system layout style with the Stereo with
subwoofer system. The center cell is the listening position (will be placed
with VOC monitor in Auro3D system). The top cells of the grid are the
front monitors and The bottom cells are the rear monitors.
5. The monitor already placed to the layout grid.
6. The layout confirmation button –Click to proceed after the layout matches
the actual monitoring system layout.
7. The setup process indicator –AutoPhase will be skipped if there is no any
subwoofers in use and WooferCal will be skipped if there is no any
Woofer systems in use.

Figure 5. Drag and drop the monitor icons onto the layout grid to build a system
layout.
Creating a Group Preset
A group preset is a set of monitors and subwoofers that reproduce audio
together. A group preset contains input and acoustic settings to optimize all
monitors and subwoofers active within the group. More group presets can be
created to full fill any need e.g. calibrate system to the another listening position.
To define a monitoring group:
1. Give the group a name that describes it (e.g. Analog Stereo)
2. Optionally you can set the System delay. It will be applied to all monitors
in the group.
3. Select the used bass management crossover frequency. This setting can
be a global when all monitors will follow the crossover selection from the
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crossover selection below. If the setting is an individual, then crossover
selections will be done individually for each monitors via a settings popup
4. Settings popup will popup when the monitor icon is clicked.
5. Name the monitor.
6. Make a monitor active or inactive within the group.
7. Select an input to be used (mixing the analog and digital inputs within the
group is not recommended)
8. Light icon indicates inactive within the group state (inactive monitors will
be hidden in other pages).
9. Normal icon indicates active within the group state.
10. Confirm the group settings by clicking on the ‘Confirm Group’ button.
•click on each monitor and subwoofer, making active or inactive within the
group by double clicking. Monitors with a green halo are part of the group,
monitors with yellow halo are not part of the group
•Individual monitor settings can be edited/checked on the left hand side (3)
(for more information, see the GLM Advanced Settings);
•confirm the group settings by clicking on the ‘Confirm Group’ button (4)
For more detailed information on using and setting up Groups, see the section
‘GLM Advanced Use’.

Figure 6. Steps in running the AutoCal automatic system calibration process
Automatic Calibration Using GLM AutoCal
GLM AutoCal is a powerful monitoring system calibration algorithm running in the
Genelec Cloud. Sweeps are generated by each monitor in a group. Responses
are recorded with the GLM measurement microphone into your computer.
NOTE: Adaptive Woofer Systems will be calibrated in WooferCal page after
Autocal and Autophase.
The algorithm analyzes the sweeps and calculates the frequency responses for
all monitors and subwoofers, then optimizes level and delay to compensate for
differences between monitors, and sets equalization for the individual room
responses to remove colorations caused by the room and the location where the
monitors have been installed. The end result is to have sound from all monitors
arriving at the listening position at the same time, same level, and compensated
for the effects of the room acoustics, resulting in very accurate imaging and
reliable monitoring.
Each monitor group has its own acoustic settings. This is one of the important
features of GLM.
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Each setup file can contain several monitoring group preset definitions each with
different AutoCal calibration settings.
Even with the same set of monitors you can determine several listening positions
by applying calibration in several locations and defining each location as a new
group preset. For example, one group can be ‘Engineer Position’ and another
‘Producer Position’. Each can have its own calibration. Then, selecting the group
in the GLM software quickly loads all acoustic settings specific for each
microphone position.
To calibrate a monitoring group
1. Check the serial number of the measurement microphone (each specific
measurement microphone calibration file is stored in the software)
2. Select the calibration mode; either a single location measurement
(SinglePoint) or measurements of multiple measurement positions
(MultiPoint)
1. Connect the measurement microphone to the GLM network adapter,
place the microphone at the listening position, at ear height, and Click on
the ‘Start Calibration’ button to start the measurement and follow the
dialog instructions.
- All monitors and subwoofers will be measured, if MultiPoint selected
then next position(s) will be measured.
- Optimization starts.
- Wait until optimization finished.
- The calibration results can be viewed by clicking any loudspeaker icon.
3. Click ‘Confirm Calibration’ button to accept and save the settings to the
setup file.
If there is a subwoofer in the group, the next step of the process is the automatic
adjustment of the phase (AutoPhase)

Figure 7. Steps in running the AutoCal automatic system calibration process
Aligning Subwoofer Phase with GLM AutoPhase
The purpose of GLM AutoPhase is to set the subwoofer phase at the crossover
frequency in relation to a selected monitor so that the combined response of the
subwoofer-monitor system is flat across the crossover region.
The steps to run AutoPhase automatic subwoofer phase calibration include
1. Define the monitor to be aligned with the subwoofer by single clicking on
the subwoofer icon first and then the monitor icon; this is done for each
subwoofer in the group; if there are several subwoofers in the group,
associate every subwoofer with a monitor before proceeding to the
AutoPhase calibration. The ‘Pair’ text with number will show the paired
subwoofer and monitor.
2. Connect the calibration microphone to the GLM adapter, place the
microphone at the listening position, at ear height, and start the
AutoPhase measurement process by clicking on the ‘Start Calibration’
button. Wait until the AutoPhase calibration is completed.
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3. Click ‘Confirm Calibration’ button to accept and save the calibration to the
setup file.
If there are several subwoofers in the group, the AutoPhase will move to the next
subwoofer automatically.
Figure 8. Steps in running the AutoPhase automatic phase calibration process
Basic Use of GLM
The main page of the GLM software offers the basic monitoring system controls
(Figure 9)
1. System level
2. Selection and activation of group presets
3. Mute, mute all.
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4. Dim (-20dB).
5. Standard loudness SPL level (calibration from ‘Group Preset : Standard
Loudness SPL Calibration’ menu)
6. Level preset selections (to set adjust the system level at desired level and
click ‘Group Preset : Set Preset Levels : Set Current Level to Preset1 )
7. Bypass BM, will bypass the Bass Management crossover filter.
Subwoofers will mute and monitors will play at the full band.
8. Loudspeaker click mode. Select what happens when the loudspeaker
icon (10) is clicked in the main page.
Solo –Clicked loudspeaker will be soloed and others will be mute.
Clicking a muted loudspeaker, it will be also soloed. Clicking a
loudspeaker multiple time will its toggle state. To clear solo state, click the
empty cell or use right click and select ‘Play all’.
Mute –Clicked loudspeaker will be muted.
Info –Clicked loudspeaker information popup will be shown.
Edit –Clicked loudspeaker acoustic editor will be shown.
9. The microphone SPL level, shown if the microphone connected.
10. The SAM subwoofer and monitor icon. Use the loudspeaker click mode
(8) to select what happen when loudspeaker is clicked.
11. ‘Play all’ when clicked when solo/mute state active.
12. The currently loaded system setup file and network status.

Figure 9. GLM software main page.
Importing GLM3 Setup
GLM3 Setup file can be imported to GLM4. Import function will import selected
GLM3 setup file. GLM3 setup file remains untouched and can be used with
GLM3.
NOTE: GLM4 setup file cannot be opened with GLM3.
Follow these steps:
1. Open GLM4 main page (at least one setup with GLM4 must be created)
2. Click ‘File : Import GLM3 Setup…’ menu.
Figure 10. Import GLM3 Setup -menu.
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3. Select a GLM3 setup file to be imported and click ‘Open’.The imported
setup will be stored with same name to the GLM4.
Figure 11. Selecting a setup to be imported from the GLM3 setup folder.
4. The GLM3 is now imported to the GLM4. All other settings than the layout
are kept same, acoustic settings, groups etc. If there is a need to edit the
layout, it can be done by clicking ‘Setup : Edit Layout’ menu.
Standard Loudness SPL Calibration
The new Standard Loudness SPL feature allows calibration of the listening level
in accordance with digital loudness standards such as ATSC A/85 and EBU
R128. Calibrated listening level is important to judge e.g. speech intelligibility,
spectral balance, platform compatibility etc.
The in-situ frequency response compensation and system alignment should be
followed by the absolute SPL listening level calibration. Note: Digital monitor
interfacing should be used to reduce uncertainty and tolerances.
•Before SPL calibration, first perform the other calibration functions to
compensate frequency response, time of flight, level difference between
channels and sub phase. You would typically do this by creating a new
“Group”, using the Add Group command; or by editing an existing
“Group”, using the Edit Group command.
•If you require a frequency response different than flat, for instance a HF
roll-off such as x-curve, now make those adjustments. To edit all
channels at once, consider using the Sound Character Profiler. Per
channel, select and edit individual monitors.
•SPL calibration should be the final item: Click the ‘Group Preset :
Standard SPL Calibration’ menu on the main page. The Standard
Loudness SPL Calibration window opens.

Figure 12. Entering to the Standard Loudness SPL Calibration page.
•Select level calibration standard from the dropdown list.
•Place the Genelec calibration microphone at the listening position.
•Click the ‘Start Calibration’ to start the calibration process. Note that the
test signal may be loud. If the background noise in the room is more than
65 dB SPL, the loudness preset cannot be calibrated. Reduce the noise
and calibrate again.
Figure 13.The standard loudness SPL calibration.
•After calibration, click the ‘Confirm’ key to save the results and return to
the main page.

After SPL calibration, the main page shows the preset levels in dB SPL units,
and the Level Preset 1 is set at the standard level, e.g. 73 dBSPL for EBU R128.
(Notice the graphical link-line between the Cal. Level and Level Preset 1 keys).
To remove the Standard SPL calibration open the calibration page and select
‘Remove Calibration’ from the Standard list and click ‘Confirm’ button.
Sound Character Profiler tool
If you feel the overall spectral balance of your system needs adjustment, i.e.
making it generally darker or brighter, the Sound Character Profiler found in the
Group Preset menu is a quick place to start. There are Profiler Presets including
the Manual option, influence all SAM monitors in a Group and their effect can be
seen on the shelving filters for each monitor in the selected Group.
The Sound Character Profiler tool (SCP) can be accessed via the ‘Group Presets
| Sound Character Profiler’ menu.
Figure 14. Sound Character Profiler tool
Storing values permanently in monitors and subwoofers
SAM monitors and subwoofers are set up and calibrated using GLM control
network and GLM user interface software.

After setup, monitors, subwoofers and the GLM adapter can also operate without
having a computer connected to the GLM adapter. This is called stand-alone
operation.
SAM monitors and subwoofers retain their settings after storing the settings
inside the monitors and subwoofers. In some models the ‘Stored Controls’
switch need to be turned ON to make monitor to use stored settings in
stand-alone mode. The ‘Stored Controls’ switch status can be seen in the Store
Groups Settings page under each monitor (N/A = monitor has no dips).
Storing is done with the ‘Group Preset: Store to Loudspeakers’ menu command.
Settings that are stored; The Current Group Acoustic Settings, Startup Level, ISS
Power Saving settings, LED Disable and Input Mode.
Figure 15. Store Group Settings page
ISS support is not available for the
following products:
7260A, 7261A, 7270A, 7271A, 8240A, 8250A,
8260A, 1238CF
LED Disable and Input Mode
support are not available for the
following products:
7260A, 7261A, 7270A, 7271A, 8240A, 8250A,
8260A, 8351A, 1238CF, 1237A, 1238A, 1238AC,
1238DF, 1234A, 1234AC, 1236A