Yellowtec hush User manual

& Operations Manual
version 1

Content
2
Examples of Use26
03
04
05
08
10
10
24
13
Safety Instructions
First steps
Hardware – hush Front Panel
Hardware – hush Rear Panel
Hardware – hush Remote
Modes
Block Diagrams hush & hush+
Soware – hush Firmware
28 Declarations of Conformity
13 Soware – hush App

Examples of Use
Safety Instructions
First steps
Hardware – hush Front Panel
Hardware – hush Rear Panel
Hardware – hush Remote
Modes
Block Diagrams hush & hush+
Soware – hush Firmware
Declarations of Conformity
Soware – hush App
Safety Instructions
3
hush and hush+ OnAir Controllers
This manual contains plenty of useful information and detailed instructions that will help you to
get started with the control of your OnAir signaling with hush and hush+ and to operate it. Further
info can be found at www.yellowtec.com/hush. Both soware and rmware for your hush device
are under continuous development. So please check www.yellowtec.com/hush/downloads from
time to time. There you will always nd the latest versions and information.
hush is by far the easiest way to control your OnAir signaling professionally. Its plug‘n‘play concept
makes controlling the dual-color OnAir indicator of your m!ka Mic Arm eortlessly easy. In addition,
hush can also be used to control the LED signal of Yellowtec‘s litt Signaling Device.
Two versions of hush are available: hush and hush+. hush oers you extensive features for control-
ling your OnAir signaling. hush+ comes with additional control functions over your mic signal like a
mute function. With 12dB up to 75dB pre-amplication, hush+ ensures rst-class sound!
Whenever we speak of hush(+) in this manual, both models hush and hush+are being addressed.
Safety instructions!
Notes on proper use!
Read this manual carefully before using any hush device. Always observe the following instructions
in order to use and operate hush, hush+, and the hush Remote safely. Improper use may result in
the loss of warranty and guarantee claims.
The hush OnAir Controller is developed to control the OnAir indicator of any m!ka Mic Arm OnAir.
hush+ on top includes a microphone preamplier. The optional hush Remote can be used as a
control unit on both devices. The units can be powered via your computer‘s USB port or by USB
power supplies. It must be ensured that these also comply with the conformity regulations of your
respective country.
Safety Instructions!
• Don‘t open hush, hush+ and the hush Remote and don‘t perform any modications. Work on
the devices has to be carried out by qualied, authorized persons only!
• Don‘t bring hush, hush+ and the hush Remote into contact with liquids. Always position hush
and hush+ in a way that ensures heat dissipation.
• Use hush, hush+ and the hush Remote only with certied USB interfaces and in connection
with certied power supplies. Audio cables must be shielded. Failure to do so may result in
interference with other devices as well as interference with hush. This may result in damage.
• Make sure that the pin assignment of the XLR-5 connector on your microphone arm is
correct – especially if you install the connector yourself.

First steps
4
First steps
hush front panel
As soon as hush is powered, it is automatically turned on. For power supply, connect hush to your
computer with the included USB-C cable. Optionally, you can use the provided USB-C to USB-A
adapter. To use hush without your computer, use a certied 5V power supply.
When using hush for the rst time, connect it to your PC or Mac via USB-C and open the hush App.
It will prompt you to specify which type of m!ka OnAir Mic Arm you are using. Specify whether it is
an older model with a red OnAir indicator or the current model with a dual-color OnAir indicator
(red/white). Then set the mode to control hush and use the hush App to make other settings as
desired. Whenever you activate hush, it will automatically load the last set settings including your
choice of mode. See page 10.
Connect the XLR-5 adapter of your m!ka OnAir Mic Arm to the mic input on the front of your hush
device. Then attach your audio interface or mixing console to process your mic signal. Therefore,
use its XLR-3 cable and connect it to hush (Mic Out) or hush+ (Line Out). See page 5.

Hardware – Front Panel
5
Hardware
hush & hush+ front panel*
*The fronts of the hush and hush+ models dier in the logo print. Another dierence is that hush provides a Mic Out,
while hush+ is equipped with a Line Out.
Front panel details
5-pin XLR female
A m!ka OnAir Mic Arm, for example, can be connected to the 5-pin XLR. Its dual-color OnAir
indicator (red, white) is controlled according to the operation status RED, WHITE. The current
device status is displayed on the front panel (3) and in the hush App. See page 23.
Note!: Older m!ka models come with a single color OnAir indicator and only support RED.
Polarity is rotated between pin 4 and pin 5 to control the two colors, so only one color can be
displayed at a time. RED always has the highest priority, if both colors are active at the same time
(e.g. both GPIs on, RED is displayed).
Mic In (XLR-5)
Attach the XLR-5
connector at the
bottom end of your
m!ka Mic Arm OnAir
here. Find details
about pin assignments
at page 6.
Mic Out (hush) /
Line Out (hush+)
Connect an audio
device via XLR-3.
Depending on the
hush model you are
using, a Mic Out (hush)
or Line Out (hush+) is
available.
Ext. Power Supply
Connect hush to your
PC/Mac via USB-C
using this PWR/USB
port. Alternatively,
you can connect a 5V
power supply here to
use hush without a
computer.
Color Indicator
The white and red LEDs
show you the currently
active color of the dual-
color OnAir indicator
on your m!ka Mic Arm:
White or Red!
Mode Indicator
The green LED shows
you the mode that is
currently selected to
control hush. Change it
directly on the device
or in the hush App.
See page 10.
Mode Select
Use a pointed
object to change the
selected mode for
controlling your hush
device. Alternatively,
you can use the hush
App. See page 10.
1 2 3
4 5 6
1

In the hush App, the setting to select the OnAir indicator dual-color or single-color should be made
to guarantee for best usability. See page 23.
The 5pin XLR female connector has the following pinout:
1: Audio GND
2: Audio hot
3: Audio cold
4: m!ka LED
5: m!ka LED
Shield: Chassis
RED
4 (Yellow cable) = +12..24VDC
5 (Black cable)= GND
WHITE
4 (Yellow cable) = GND
5 (Black cable)= +12..24VDC
Find futher details in the m!ka Brieng Book available at www.yellowtec.com/mika/downloads.
3-pin XLR male
The 5pin XLR female connector has the following pinout:
1: Audio GND
2: Audio hot
3: Audio cold
With hush, the unchanged audio signal with microphone level is present here.
With hush+, on the other hand, a pre-amplied line signal is available here, which can also be mu-
ted (MUTE function). With hush+, the preamplication of +12..75dB, 48V phantom power and the
high-pass lter can be set via the hush App.
USB-C
The device is supplied with power via the USB-C port. The power can be supplied via a PC or MAC,
e.g. to congure the device or to use it via USB-MIDI or USB-HID. For applications where no PC or
MAC is needed, e.g. the use as a stand alone solution with remote control or control via GPIs or
MIDI-EXT, a USB power supply is suicient.
It is important to ensure a suicient voltage and current supply. If the USB port does not provide
enough power, an externally powered USB hub can do the job. hush and hush+ are designed for 5V,
450mA.
Hardware – Front Panel
6
2
2
1
3
4
5
2
3
1
4

Hardware – Front Panel
7
Mode Select
The Mode Select is used to set the operating mode. The Mode Select Switch on the front panel can
be operated with a paper clip or similar to adjust your selected mode to control hush directly on
the device. Alternatively, you can set the mode in the hush App available at:
www.yellowtec.com/hush/downloads.
Choose between ve modes to control hush: Remote, GPIs, USB-HID, USB-MIDI and MIDI-EXT.
Check the chapter “Modes“ for further information. See page 10.
Besides that, the mode select switch has two additional special functions:
1) Pressing and holding it when switching on puts the device into bootloader mode. This
can be used to force the update functionality in case of an error. See hush App.
2) Press for approx. 5 seconds during operation to restore the factory settings of the device.
5

Hardware – Rear Panel
8
hush & hush+ rear panel
Rear panel details
5-pin MIDI-IN
Connect a device compatible with MIDI here, e.g. a MIDI keyboard.
litt CONTROL
The litt CONTROL output is suitable for controlling a Yellowtec litt Signaling Device. For details
check www.yellowtec.com/litt.
When the function RED is active, no matter if triggered by GPI, MIDI event, hush App or hush
Remote, the CONTROL output switches to +12V. The current carrying capacity is limited to 60mA
maximum.
1
MIDI-EXT IN GPOsGPIs
EXT-MIDI In (DIN)
Connect hardware for MIDI
control via the external
MIDI input and use hush in
MIDI-EXT mode. Manage
your MIDI settings in the
hush App. See page 18.
Connector for hush Remote
Connect a hush Remote to
this USB-C slot to control
your hush via remote when
using remote mode. To do
so, use the supplied cable
and this connecting slot only!
Never connect any other
USB-devices here!
See page 10.
litt Control
A slot for the connection
of an external litt allows
you to control a LED color
segment of Yellowtec‘s
litt Signaling Device. Find
more info about litt at
www.yellowtec.com/litt.
GPI/Os
Use the GPI connectors to
control hush in GPI-Mode. The
red light status is available at
the GPO output in all modes. By
default the red signal is always
given priority over the white
signal if both are selected.
See page 9.
1 2
3 4
2

Remote Control Connector
Connect the hush Remote here. Do not connect any other USB-C device or port to this port.
This is only suitable for Yellowtec‘s hush Remote!
Control Ports
The control ports are divided into the groups inputs (GPIs) and outputs (GPOs).
GPIs
RED: A connection to the GND pin switches the RED function active.
WHITE: A connection to the GND pin switches the function WHITE active.
If WHITE and RED are connected to GND at the same time, RED gets priority and the RED function
becomes active.
MUTE : A connection to the GND pin mutes the audio signal of hush+. This input has no function on
the hush
GPOs
If the function RED is active, no matter if triggered by GPI, MIDI event, test button or remote control,
the GPO switches through to GND. This allows e.g. to use a relay to switch a lamp. The GPO is only
switched by the function RED.
Hardware – Rear Panel
9
4
3

Modes
To control hush you have a choice of ve modes. They allow you to easily integrate hush into com-
pletely dierent environments and cover many application areas. At any time you can change the
selected mode either directly on your hush device or in the hush App.
Choose from the ve Modes Remote, GPIs, USB-HID, USB-MIDI and MIDI-EXT.
hush Remote
As a standalone solution, the hush Remote provides extremely convenient control over hush. It
perfectly suits all users whose existing equipment does not support red light control. Optionally,
a wired remote control can be connected to the USB-C on the back of the hush(+). Then this mode
has to be set and the functions of the two buttons of the remote control are:
OnAir Button
In idle mode, the button is lit white and the audio of the hush+ is muted (MUTE).
For a hush (without preamp), the microphone signal is not muted.
In the active state, the button lights red and turns the m!ka OnAir indicator RED as well.
If the mute button is also pressed while in the active state, the OnAir button will ash red.
The button is latching and each press of the button changes from silent to active state.
Press the OnAir button on your hush Remote to indicate on your m!ka Mic Arm that you are OnAir.
As soon as you do so, the LED signal of your m!ka Mic Arm will light up red without any delay. If you
are using the hush+ version, this step will also activate your microphone signal. Press the OnAir
button again while the LED signal of your m!ka Mic Arm is red, to turn o the red shining OnAir
indicator. Using hush+, this also deactivates your mic signal.
Mute Button
In idle mode, the button lights up white. The button lights up yellow in active mode and the dual-
color m!ka OnAir LED indicator turns white. Only on the hush+, this mutes the audio. This button
has no eect on the mic signal on the hush (without preamp).
The mute button of the hush Remote is designed as a cough button. Since only the hush+model
with its preamp processes your audio signal, the mute function is only available with hush+. Press
and hold the mute button to mute your microphone signal. A white shining OnAir indicator on your
m!ka Mic Arm as well as a yellow Mute button and a red ashing OnAir button on the hush Remo-
te unmistakably indicate muting. Release the mute button to reactivate your microphone signal.
Doing so, the OnAir LED will light up red again and you are back OnAir.
Modes
10

Modes
11
GPIs
Using the GPI input of hush you can connect your hush unit to any standard open collector output
of your hardware. For example, control hush via a mixing console with the respective outputs.
GPIs:
RED: A connection to the GND pin switches the RED function active.
WHITE: A connection to the GND pin switches the function WHITE active.
If WHITE and RED are connected to GND at the same time, RED gets priority and the RED function
becomes active.
MUTE: A connection to the GND pin mutes the audio signal of the hush+. This input has no
function on the hush
GPOs: If the function RED is active, no matter if triggered by GPI, MIDI event, test button or remote
control, the GPO switches through to GND. This allows e.g. to use a relay to switch a lamp. The GPO
is only switched by the function RED.
USB-HID
The USB-HID mode allows to integrate the functionalities of your hush and hush+into your own
macOS or Windows scripts and soware. Therefore, we provide libraries and additional
documentation for Windows and Mac at www.yellowtec.com/hush/downloads.
In this mode, the RED / WHITE and (with the hush+) the MUTE function can be triggered via the
hush App for test purposes. This can be helpful to test the correct cabling of the m!ka OnAir Mic
Arm or to switch the functions from the PC or Mac. See page 18.
USB-MIDI
Select USB-MIDI to control your hush via DAW soware. This way, the OnAir indicator on your m!ka
Mic Arm is switched on whenever you start recording in your DAW interface. The hush(+) will then
appear in the PC or Mac as a MIDI Out device.
A MIDI preset can be selected via the hush App, this preset will remain in the device even aer pow-
er o. The MIDI preset contains a predened set of MIDI events which are assigned to the functions
RED / WHITE / MUTE (ON / OFF). If a corresponding MIDI event is sent to the hush(+) in the DAW
soware, the corresponding function is triggered.
The MIDI Notes preset is stored in the device by default, other presets are HUI and Mackie Control.
Additional predened presets can be loaded via the hush App. With the hush App you can also
create your own presets. More about this in the description of the hush App. See page 18.

MIDI-EXT
Connect MIDI hardware to control your hush via external MIDI. The hush App oers extensive
possibilities to congure your MIDI setup.
External MIDI controllers or keyboards can be connected via the 5-pin MIDI socket on the rear of the
hush(+). To be able to use these to control the functions RED / WHITE / MUTE, this mode must be
set.
In the factory setting the MIDI preset MIDI notes is preset: C3 = WHITE, D3 = RED, E3 = MUTE , MIDI
channel 1, NOTE ON/OFF, no velocity. If a dierent or own preset is needed, this can be set via hush
App. More about this in the description of the hush App. See page 18.
Modes
12

Software
13
Firmware
The hush Firmware is the soware that is installed in the device and runs there as soon as the
hush(+) is supplied with voltage. The rmware provides the basic functions of the device, as
described in the Hardware chapters. By updating the rmware, the range of functions can be
extended and possible errors can be corrected. The current rmware is oered for download on the
page www.yellowtec.com/hush/downloads.
A rmware le has the extension .y and an update can be done with the corresponding function
of the hush App. The current rmware version is displayed in the hush App > Maintenance > Info.
Depending on how the settings are made in the hush App, the hush App informs about available
rmware updates.
hush App
The hush App is a desktop application for Windows and macOS for setting, testing and updating a
hush(+) device. In the hush App you can choose your desired mode to control your hush or hush+
device. To determine the currently active Mode, please select the tab STATUS in the hush App.
See page 14.
Installation
The app is installed using the hush App Installer, which can be downloaded here:
www.yellowtec.com/hush/downloads.
The downloaded le is .zip packed and can be unpacked using the functions provided by the
operating system. For proper functioning of the installer, the le should be unzipped to a directory
on the hard disk to which the user has read-write access, e.g. /downloads. Do not start the installer
from the .zip folder, this may cause errors.
Double-click to open the installer, and you will be guided through the GUI-based installation.
Finally, an operating system restart under Windows is necessary, since all necessary drivers for the
device are installed in addition to the app.
First start
The rst time the hush App is started, the Settings dialog is called:
The Settings dialog is only called up once automatically when the app is started for the rst time.
You can access the dialog at any time via Maintenance > Settings to make changes. See page 21.

hush App – Main Window
The main window shows some general information and the tabs STATUS, MIDI SETUP and
MAINTENANCE. With the hush+ additionally PREAMP.
In the upper right corner there is a dark / light mode switch to change the display to day / night
mode. The last selected setting is saved when the hush App is closed and recalled when it is
opened again.
For as long as the hush App holds a connection to a device, 'connected' and a green dot is
displayed under the app's title. If more than one device is plugged into the PC or MAC, a selection
box will appear to select the device to which the app will establish a connection then. As soon as
the connection establishment is completed the current settings such as names, parameters and
the MIDI presets will be loaded from the device into the soware automatically.
The hush App can only be connected to one hush(+) device at a time. To manage multiple devices
at the same time, the hush App must be opened multiple times.
hush App
14

Footer Menu: le side
The version of the hush App is displayed at the bottom le. If an update is available and the info is
enabled in the settings, an update info icon is displayed next to the version.
Update info icon : u
Click on the update info icon and the info dialog is displayed. Here you can see for which soware
(app, rmware) there is an update available. The Info dialog can also be displayed at any time via
Maintenance > Info.
If an update is available, the download page can be accessed via the „update now“ link.
Footer Menu: right side
By clicking on the hush(+) symbol you get to the About page.
Here the most important information is summarized when it comes to contact details and licenses.
hush App
15

STATUS
The STATUS tab also gives you access to a quick check if your hush is wired correctly. Therefore,
please choose the mode „USB HID/Test“ on the le and have a look at the “Test“ section. Select the
desired signals on the right side and compare the status displayed in the app with the current sta-
tus that your m!ka Mic Arm‘s OnAir indicator is currently showing. If both signals match, the wiring
is done correctly.
The status tab is divided into three parts:
Mode Select
Here the operating mode of the hush(+) is set. These are the 5 operating modes described under
Hardware / Mode Select, which can be set both here in the soware and via the Mode Select
button.
States
Here the active LED color is displayed. Red has priority over white if both colors are activated at
the same time. In addition, an active microphone mute symbol is displayed for hush+, if the mute
function is active.
Test
In the USB HID / Test mode the so keys Red, White and (with hush+) Mute are enabled. With the
help of the buttons, the corresponding function can be triggered for test purposes, e.g. to check the
correct cabling of the device. The buttons are latching when pressed briey, and momentary when
pressed for longer.
hush App
16

PREAMP (hush+ only!)
In addition to red light control, the hush+ model also allows you to control your microphone signal.
Using hush+, you will nd several settings in the PREAMP tab of the hush App. Make use of them to
optimize your mic signal.
hush+ serves as a rst-class preamp for your microphone. Adjust the gain of your microphone sig-
nal with the hush App. Select your desired gain within the
extensive range from 12dB up to 75dB.
Depending on the needs of your mic, you can also switch the phantom power of your microphone
on or o in the app. Activate or deactivate the high-pass lter at the touch of a button to remove
unwanted rumble. This is how hush+ helps you to further optimize your microphone signal to
deliver high-quality sound!
hush App
17

hush App
18
MIDI SETUP
If you want to control hush via USB-MIDI or EXT-MIDI, you will nd various conguration options in
the hush App. To access them, select the tab MIDI SETUP. There you can add your own proles or
select one of the stored MIDI proles, e.g. the HUI protocol.
A hush App MIDI preset is a le with the extension .ymp.
In a MIDI setup, the 6 states Red(On/O) , White(On/O), Mute(On/O) are assigned individual MIDI
events. Three predened MIDI presets are included, the presets can be copied and edited as nee-
ded to customize the control of the hush(+).
The predened presets are
• MIDI Notes
• HUI
• Mackie Control
The factory default is the MIDI Notes preset.
The usage of the MIDI presets varies, a possible assignment is:
• External MIDI device: MODE = MIDI, PRESET = MIDI Notes
• DAW soware with HUI support: MODE = USB MIDI, PRESET = HUI
• DAW soware with MCU support: MODE = USB MIDI, PRESET = Mackie Control

The MIDI tab hast the following functions:
• SAVE: ,
• LOAD: 8
• EDIT: j
The active MIDI setup is displayed in the display name eld. The display name can be assigned
independently of the le name.
SAVE: ,
SAVE opens the dialog for saving the hush App MIDI preset in YMP format. Any storage location and
le name can be assigned. The name of the preset in the display eld is independent see below.
LOAD: 8
LOAD opens the dialog for loading a hush App MIDI preset in YMP format.
The three presets mentioned on page 18 are predened and included in the installation.
EDIT: j
To change the display name and other elds, the MIDI setup must be edited. To do this, switch on
the EDIT mode ( j).
In EDIT mode the display name can be changed. The name must be at least one character long and
may contain Unicode.
hush App
19

RED, WHITE, MUTE
For the functions RED ON | OFF, WHITE ON | OFF, (and hush+) MUTE ON | OFF there are additional
EDIT buttons, which open an extra input eld. In this input eld you will nd the current MIDI event
for the corresponding function.
EXAMPLE:
RED ON is the triggering MIDI event = 90 (Note ON, channel1) 3E (Note)
No velocity is used, therefore 2 values are suicient.
The input eld can be lled with up to 15 arbitrary values in hexadecimal notation. However, since
this function is linked to MIDI external and USB MIDI modes, only valid events from the MIDI proto-
col should be used:
• 8n Note OFF
• 9n Note ON
• An Polyphonic Aertouch
• Bn Control Change
• Cn Program Change
• Dn Monophonic Aertouch
• En Pitch Bending
• F0..7 System Exclusive
For more information see MIDI Specication
ACTIVE
The ACTIVE checkmark allows a MIDI event to switch the function in principle. Some MIDI setups
(HUI, MACKIE CONTROL) have only the RED and WHITE functions activated, because it does not
need a MUTE function to use them. Thus the ACTIVE check mark is not set there and it does not
matter what is entered in the MUTE ON | OFF elds. The MUTE column is ignored accordingly.
NOTE!: In the special case, if ACTIVE is switched on and at the same time nothing is entered in the
OFF MIDI event, the function is switched ON, but never switched o again via OFF.
hush App
20