Behringer UMA25S 用户手册

U-CONTROL UMA25S User Manual

What can I control with the UMA25S?
Basically, you can control any device that is MIDI compatible. Both hardware and 

software MIDI devices are controlled in exactly the same way. The only difference 

between them is the wiring.
Below are a couple of suggestions on how you can use your UMA25S:

Playing external sound generators (for example, MIDI sound modules, 

rack synthesizers and virtual instruments)

Editing sound parameters of (virtual) synthesizers, sound samplers and 

GM/GS/XG sound generators

Controlling parameters on effects equipment and software plug-ins, such as 

effects processors, compressors and digital equalizers

Remotely controlling software mixers (functions for volume, panorama, 

mute, etc.)

Remotely controlling transport functions (Play, Fast Forward, Stop, etc.) 

on sequencers, hard-disk recorders, drum machines, etc.

Live control of volume and sound parameters of sound modules on stage

Remotely controlling groove boxes, step sequencers, MIDI generators and 

other “live” software

Controlling program changes and volume level on sound generators

Suitable for band keyboardists, DJs, sound engineers, home and project 

studio owners, theater technicians, etc.

And how does it work?
Each control element of the UMA25S can be assigned to particular MIDI 

parameters. Assignments are carried out in Edit Mode (see Chapters 5.3 and 

5.4). Whenever one of these control elements is used, the UMA25S generates 

the control data assigned to this control element which are then transferred 

to external devices over a data link. For this reason, the VOLUME slider is set by 

default to send data that controls the volume level of a channel, for example.
The control data generated by the individual control elements are also referred 

to as MIDI messages. Generally, MIDI messages can be divided into three 

major groups:

Channel Messages: These messages are used to transmit channel-specific 

control information. An example of a channel message is the Note On 

message. As soon as a key is played on the UMA25S’ keyboard, the device 

generates a message which holds the information for pitch, channel number 

and velocity. This way the receiving sound generator recognizes which tone 

has to be played.

System Messages: These messages are not channel- specific, but affect 

the entire system to which they are sent. They are divided into three 

subcategories: System Exclusive Messages (for operating system backup, 

updates and management of memory contents); System Real-Time 

Messages (for remote control of other devices, etc.); System Common 

Messages (for synchronizing several devices, etc.).

Control Messages: These are also known as Control Changes or 

Controllers, abbreviated to “CC”. There are 128 controllers in total, 

numbered from 0 to 127 (refer to the table of controllers in the appendix). 

The controllers are channel-specific.

5.2.1  Changing the velocity curve
You can adjust the UMA25S’ sensitivity which has an effect on the velocity with 

which the keys are pressed and therefore also on the volume level. 
1.  Press the EDIT/EXIT push button.
2.  Turn the E9 rotary knob completely to the right. “crV” (which stands for 

Velocity Curve) appears on the display.

3.  Select the desired velocity curve with the E11 rotary knob. You can select one 

of the following options:
FIXED: The velocity curve is switched off (as is the case with an organ). 

The keyboard always sends the same velocity value. This value can be 

adjusted with the E12 rotary knob.
SOFT: The keyboard responds to the finest nuances. Applying different 

pressures to the keys can make a big difference in volume.
MEDIUM: The velocity curve is linear.
HARD: The velocity curve is non-sensitive. You have to hit the keys very hard 

in order to play loud.

4a.  Press the ENTER key to confirm.
4b.  Alternatively, press the EXIT push button to cancel any changes made.
These settings need not be saved.

5.2.2  The octave and transpose functions
The OCT </> push buttons can be used to shift the pitch in octave intervals. 

This is useful because the UMA25S consists only of 25 keys, whereas the MIDI 

specification includes 128 notes. In case you want to play a bass line, it can be 

useful to move the keyboard range downward.
Alternatively, the OCT </> push buttons can be used to tranpose notes in 

semitones so that you can play a piece in a key that works for you. In order to do 

so, you need to adjust the settings in Edit Mode.

Octave function:
Use the OCTAVE </> push buttons to shift the keyboard’s playing range up to 

4 octaves.

Press OCT> to play the keyboard an octave higher. The OCT> LED lights up.

Press OCT< to play the keyboard an octave lower. The OCT< LED lights up.

Press OCT< and OCT> at the same time to return to the default octave range.

Activating the Octave function (OCT ASSIGN):
When the Transpose function is active, you activate the Octave function 

as follows:

Press the EDIT/EXIT push button. The device switches to Edit Mode. The EDIT 

LED lights up.

Press the OCT +/– key to select the Octave function.

Press the ENTER key to confirm. The device switches back to Play Mode 

(EDIT LED goes out).