OpusFSI Flight Simulator Interface for and
Flight Simulator Interface for FSX & Prepar3D
ButtKicker must be wired into the audio. We recommend using a Sound
Blaster X-Fi Go PRO USB sound card for the ButtKicker control to
separate the BK audio control signals from the simulator's sound.
should configure your normal (FSX/P3D) sound device, which normally has
the speakers attached, as the Windows Default sound device in Control
Panel. Then you assign FSX/P3D to the default sound device.
you have a separate sound card for the ButtKicker then configure it to
its assigned USB device which is NOT assigned as the default and is
totally separate to your FSX and speaker sounds. Ensure 3rd party addon
sound packages do not use this separate sound card, they should
use the default speakers instead.
If you use choose to use a shared audio card then you will most likely be able to hear the BK audio since the human ear is sensitive throughout the entire BK frequency range. In this case without a separate sound card for the ButtKicker, you should disable 3rd party addon sound packages since they will conflict with OpusFSI.
have been known to overheat in the past so please take care in adjusting
the ButtKicker control options and volume levels. We recommend to keep
the volume levels adjusted to give a slight trembling effect with just a
subtle hint of motion or vibration even at the maximum volume level
in use always monitor the power amplifier to make sure the unit is not
Opus Software Limited assumes no responsibility or liability for
any injury, loss or damage incurred as a result of use of the ButtKicker
device or the Opus ButtKicker audio control software.
current software includes audio control during taxiing, engine
vibration, flaps movement, general turbulent motions, turbulent bump or
jolt effects, spoiler or speed brake movement, landing gear movement,
landing, roll out after landing and reverse thrust. This version also includes
frequency mixing to allow the audio signals for up to three effects to
be modulated together.
upgrading from previous beta, you may need to re-specify your Master
Volume and reassign all defaults to all the effect options via the
individual Default buttons. See our SimForum Announcements or
\OpusFSI_v5\OpusFSI_Release_Notes.txt for details.
ButtKicker Audio Control is dependent on the OpusFSI
DHM for its parameters and the OpusFSI DHM must be active or enabled
when the FSI SERVER program starts in order to get any ButtKicker audio
control output. The ButtKicker audio test will be conducted as normal
but you will NOT get any ButtKicker control without the DHM parameters
you are not using Live Camera with DHM enabled in its camera views, then
you must enable the General DHM, usually the VC views option. If you
enable General DHM you MUST also restart the FSI SERVER program and let
the ButtKicker complete its three part test (watch the Spy window) before
the ButtKicker control will be active.
enable option is configured via the OpusFSI
dialog, accessed via the Configure
button on the server's main form.
Two separate ButtKicker audio control programs are provided. The FSXBKCTRL.EXE program is used on FSX and FSX-SE (dotNet 2) systems, and the P3DBKCTRL.EXE program is used on Prepar3D (dotNet 4) systems. These control programs are activated automatically by the OpusFSI server. This removes from OpusFSI the burden of audio control.
The state, options, size, and position of the control Spy window is saved on program exit and restored on restart. Different coloured text is used to differentiate between the various control actions and audio channels. The Spy buffer is cleared automatically after 30 minutes.
This dialog is used to enable the ButtKicker
devices, associate a DHM xyz axis to the device, and assign an audio
output to the device.
There is a known bug in DirectX where the
audio device order can be wrong, so if the obvious device selection does
not work then try a different listed output. You can use the Windows
Sound monitor (the dialog you use to adjust master volume it also allows
you to select audio devices) to see the BK audio output on the desktop.
After enabling a ButtKicker device and
assigning an audio output the Test
Audio button should be used to test the selected audio output. For
this you may need to plug in speakers, a headset, or the actual
After testing the audio output (which is
audible) the Options button
should be used to tweak the frequency options and set the required
Master Volume level and if necessary tweak the individual effect volume
Audio Test Dialog
This dialog can be used to test the audio
output for the selected audio device. The synthesized low frequency
signals can range from 10Hz to 110Hz, these sounds are audible with the
correct volume adjustment in both speakers and headphones.
Use the sliders to adjust the frequency and
volume output of the signal. Press the Play
button to output the audio signal, press the Stop
button to stop the audio output. The Bump
option can be used to simulate a Bump signal using the Bump parameters
configured in the ButtKicker Options dialog.
This dialog will be found useful when testing the ButtKicker
response to certain single frequency audio outputs and volume levels.
This dialog is used to adjust the ButtKicker
options including the Master
The current ButtKicker
Warnings and Advise can be displayed using the question mark (?)
icon at the bottom of the dialog. The ButtKicker Warnings and Advice is
also automatically displayed the first time you click on the OK button
to ensure the ButtKicker Warnings are displayed including the Disclaimer statement from Opus Software Limited.
There is actually no real need to make great
changes to the default settings, just set your Master Volume and
use the Assign Default Volumes to adjust the default volume
levels as described below. The BK has a limited range and response so
there really isn't any great need to tweak very much at all, the default
frequencies should all be pretty close to their ideal settings.
Volume level can be specified as a percentage using the box
provided. We recommend that all ButtKicker volume levels and ranges are
set so that the ButtKicker Power Amplifier does not need to clip the
signal at any of the specified volume levels or ranges.
For all but the Turbulent Bump effects, we
recommend you set the volume levels to achieve a smooth rumble effect
or a smooth trembling of the seat or platform. The ButtKicker
effects should provide a subtle hint of motion or vibration rather than
sudden and violent jolts.
To aid this we have provided Default volume
settings, these can be set individually using the various Default
buttons, in which case both
the recommended frequency and volume levels are set. Alternatively,
after specifying a Master Volume,
all effect volume levels can be adjusted and assigned with appropriate
defaults using the Assign Default
Master Volume will be set to match the Device and Application Mixer
volume sliders displayed either using the Speakers icon on the taskbar
or by opening the Volume Mixer dialog in Windows.
All default volume levels and ranges have been
set for a typical direct feed from an installed 'internal' sound card
and assuming a Mixer Volume setting of 100%. Hence setting the Master
Volume to 100% will assign the lowest default volume levels
and ranges as it assumes your Window's Mixer Volume has been turned up
Setting a lower Master
Volume level and hitting the Assign
Default Volumes button will result in increased volume levels and
ranges being set. You can use this adjustment to match your own
preferences keeping in mind the overall goals and recommendations for
the ButtKicker effects.
If you are using a USB sound stick, such as
the recommended Creative Labs Sound Blaster X-Fi Go PRO USB sound card,
then even with the Window's Mixer Volume set to 100% you may need to
reduce the Master Volume setting to 70% or 80% to correct for the lower volume
output of the USB sound stick.
You can use either the Test
buttons to get an idea of the ButtKicker response to the settings.
Alternatively, use the Test Audio
dialog and Play option to get
an idea of the ButtKicker's response to a specific frequency and volume
At present the default Engine Vibration Power level for Light
Aircraft has be set at 5% so that a gentle vibration can be felt
providing feedback of the current throttle setting whilst flying light
piston aircraft. However, the default power level for Heavy (jet)
aircraft has been set at a higher level (currently 80%). This higher
power level setting is to ensure no vibration is felt at normal cruise
power (N1) settings and hence you will not have the ButtKicker device
permanently active on your medium and long haul flights. If you do fly
for extended periods in a light piston aircraft you may like to consider
increasing the power level setting to 80% for Light Aircraft , this
should achieve the same thing and only bring in the ButtKicker vibration
for the higher climb power settings.
The general turbulence threshold or cutoff point can be set by
adjusting the 'Cutoff' parameter in the Options dialog. A
setting of 0% will result in a threshold equal to the average turbulence
deflection for the specified DHM axis. A setting of 50% will set the
threshold to the midpoint between the average and maximum DHM
deflection. A setting of 100% will disable the general turbulence
A Shortcut command has been added to allow the
ButtKicker control to be toggled on and off. You can assign a key
sequence or joystick button to this command in the usual manner via the
Shortcuts dialog, accessed via the FSI SERVER program's main form.
If the Windows audio output suddenly stops for
an unknown reason you can use the toggle on/off to reset the interface.
A multi pass initialisation sequence has been added to help settle
the Windows audio out interface and also exercise the ButtKicker
Timed restarts of the audio output have had to be introduced to
overcome a looping problem within the Windows Audio Out functions which
results in secretly silencing the audio output (aborting the audio loop)
after short periods. This mostly happens after the program is first
These messages will indicate
the current mode, frequency, and volume of the BK audio and are
indicated with the following messages.
BK Initialising ...
BK Initialisation: Pass x of y
TST BK Initialisation: Complete
BKn.x Timed Restart:
BKn.a <ID> PlaySound:
freq Hz, vol
BKn.a <ID> Volume:
TST BKn.a Stopped
BKs Stopped All
Where 'n' indicates the ButtKicker device
(1..3), 'a' identifies the audio channel (0..2, or x), and <ID>
indicates the current mode or origin for the sound,
Ground taxiing or roll out after landing effects.
Engine vibration effects.
GEAR = Landing gear effects.
FLAPS = Flaps deployment effects.
SPOILERS = Spoilers or speed brake deployment effects.
The audio frequency, ranging from 10 to 110 Hz.
= The volume level,
ranging from 1 to 100%.