Specifications
1 
Quick Start 
Thanks for purchasing your Mopho x4 synthesizer! Listen to the sounds, twiddle 
some knobs, have some fun! 
Please Register! 
Please go to www.davesmithinstruments.com and register your synth. If you 
purchased directly from us, there is no need to register—we already have your 
contact information. 
Powering Up 
Plug in the power supply, connect (in stereo!) to your mixer/sound system, and 
start playing! 
Try applying keyboard pressure (aftertouch) and the mod wheel. Many sounds 
are fairly simple at first, then come alive when you use the controllers. With 
other sounds, you may need to hold the notes a while to let the sound unfold. 
Playing in different ways has a big effect on the programs. 
Selecting and Editing Programs and Global Settings 
You can use the increment and decrement (I
NC/YES and DEC/NO) switches to 
step through the programs. Use P
ARAM 1 to scroll quickly through the programs. 
P
ARAM 2 changes banks. There are eight banks of 128 programs: four banks of 
user programs (U1 through U4) and four banks of factory programs (F1 through 
F4). The user banks are initially copies of the factory banks. You can edit any of 
the programs, user or factory, but you can only save changes to the user banks. 
The factory banks are read only. 
To edit a program, just turn any knob. The new value will be displayed in the 
bottom line of the LCD (the top line displays the programmed value for handy 
reference). 
After turning knobs, just hit P
ROGRAM so the LCD goes back to the 
program/bank screen, allowing you to change programs again. 
Press and hold P
ROGRAM briefly to display the Global menu and change higher 
level parameters such as MIDI channel number, Transpose/Detune, and so on. 
The P
ARAM 1 knob changes the displayed page and PARAM 2 or increment and 
decrement change the values. These settings are remembered when the synth is 
turned off. 










