Evolution MK-149 

www.evolution.co.uk 

 

M U LT I D ISP L A Y

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MIDI KEYBOARD MANUAL 

 
 
1.  

POWER SUPPLY 

 
1-1  

DC Power - Batteries (not included) 

 

This unit is powered by 6 “C” (R-14) size batteries. Weak batteries will 

 

result in poor performance. Insert batteries as follows: 

 
 

1. Remove the battery compartment cover and take out the batteries. 

 

2. Insert new batteries making sure that the polarity is correct. 

 

3. It is advisable to replace all 6 batteries at the same time and never 

 

mix batteries. Use alkaline batteries for maximum performance. 

 
1-2 

AC Power 

 

You can also use an AC adapter with the following specification: 9-12V DC output, 250-300mA, centre positive. 

 
Note: Do not leave the adapter plugged in for long periods of time if the unit is not in use. 
 
2.  

Preparation 

 
2-1 Connect the unit with other MIDI equipment you may have: 
 

MIDI Sound Module

MIDI IN

MIDI IN

MIDI IN

MIDI OUT

Computer

MIDI Keyboard

 

 
2-2  

Turn on the POWER switch. 

2-3  

Turn all other equipment on. 

 
3. 

Setting the MIDI TRANSMIT Channel 

 
There are 16 MIDI transmit channels available. Once you have set the unit’s MIDI channel, the unit sends all MIDI messages 
on this MIDI channel. Be sure to match the channel with the RECEIVE channel of any connected equipment. 
 
3-1  

Press the CHANNEL switch. The LED shows the present TRANSMIT channel 

3-2  

Press one (or two) of the numeric keys to change the channel. The LED changes to the pressed number. 

3-3  

You can also use +/- switches to increase or decrease the value.