TM4-BK is the best basic model with unique patented function TOTTER MIDI GUITARIST® built on the left side of accordion.



  • for left hand side
  • control panel
  • 50 internal memory locations
  • dynamics adjustable for each track separately
  • electronic sensors of keys and bellows
  • possible to upgrade to advanced models
  • possible to upgrade the TOTTER MIDI microphone system
  • contains an interface board, control panel, sensor pack, connection cables, manual



TM4-BK is high-tech, best-selling bass midi. We recommend it in combination with the TOTTER MIDI microphone system.


It is the world’s only MIDI system with the patented TOTTER MIDI GUITARIST® (enables you to sound the chord by simply playing the bass) function.


With the grille mounted control panel, the use of the TM4-BK model is combined with the movement of your fingers when playing the accordion.


TM4-BK provides an excellent imitation of the trio (accordion, guitar and bass). You recall any settings quickly and easily from 50 internal memory programs. Full control of all instruments is in your hands. It is very suitable for learning bass figure and rhythmic playing.


To operate the TM4-BK model built into the accordion, you need a sound generator, for example, sound module (SONATTER TM4), synthesizer, keyboards, computer, … and active speaker.


Make sure on your own ears!


You can test all our products yourself!


DOWNLOAD brochure MIDI in pdf
DOWNLOAD brochure Base in pdf



Need more information? Please contact us.

Compare Basic Models


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